DESCRIPTION OF PROJECT/2000 FOR YANGTZE DYKE …...2.1 Project Background 2.1.1 Yangtze River and Flooding ... considering flood release and storage at the same time. Releasing ranks

E-291VOL. 2

DESCRIPTION OF PROJECT/2000

FOR

YANGTZE DYKE STRENGTHENING PROJECT

MARCH 2000

Research Institute for Yangtze Water Resources ProtectionWith assistance from:Hunan Water Conservancy & Hydropower Survey & Design InstituteHubei Water Conservancy & Hydropower Survey & Design Institute

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YBFCP/EIA FINAL REPORT CHAPTER 2: PROJECT DESCRIPTION

CHAPTER 2

PROJECT DESCRIPTION

TABLE OF CONTENTS:TEXT

2.1 Project Background2.1.1 Yangtze River and Flooding

2.1.2 Master Plan for Yangtze Basin Development2.1.3 Need for YBFCP

2.2 Project Components2.2.1 Dyke Rehabilitation2.2.2 Resettlement

2.3 Environmental Protection Measures2.4 Construction Program

2.4.1 Construction Layouts2.4.2 Construction Methods for Main Items2.4.3 Construction Schedule2.4.4 Summary of Construction Program

2.5 Comparison of Altematives2.5.1 Non-project Alternative2.5.2 Other Alternatives Considered

2-.6 Economic Analysis of Project2.6.1 Introduction2.6.2 Project Budget2.6.3 Benefit-Cost Analysis

2.7 Project Management2.7.1 Introduction2.7.2 Establishment of Institutions2.7.3 Project Management2.7.4 Technical Management2.7.5 Financial Management

2.8 Summary and Conclusions

FIGURES

Figure 2.2-1 Project AreaFigure 2.2-2 Sub-project in HubeiFigure 2.2-3 Sub-project in HunanFigure 2.2-4 Typical Resettlement Area in Hunan

Figure 2.4-1 Sketch-map of Typical Dyke SectionFigure 2.7-1 Sketch-map of Project Management System

TABLES

Table 2. 1-1 Condition of Dykes Involved in ProjectTable 2.2-1 Project Components and Protected AreaTable 2.2-2 Summaries of the Main Quantities of Work of ProjectTable 2.2-3 Sunmmary of Property Losses Result from Relocation

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Table 2.4-1 Construction ScheduleTable 2.6-1 Summary of Economic Analysis of ProjectTable 2.8-1 Sunmmaries of Project Characteristics

ANNEX A REFERENCES

Reference reports and documents101 "Report on Key Points of Comprehensive Utilization Planning for the Yangtze Basin",

CWRC, December, 1988

103 "Recommendation on Yangtze Main Dyke Rehabilitation in Hubei", Hubei Instituiefor Survey and Design of Water Conservancy and Electric Power Project, May, 1999

104 "Recommendation on Yangtze Main Dyke Rehabilitation in Hunan", Hunan Institutefor survey and design of water conservancy and electric power project, March, 1999

105 "Implementation Program of Yangtze Main Dyke Rehabilitation Project of HubeiProvince in Application for Loan from the World Bank (draft)", Hunan Institute forSurvey and Design of Water Conservancy and Electric Power Project, June, 1999

106 "Study Report on Feasibility of Rehabilitation of the Yangtze Main Dyke in Hunan"and its attachment, Hubei Institute for Survey and Design of Water Conservancy andElectric Power Project, May, 1999.

107 "Study Report on Feasibility of Rehabilitation of the Yangtze's Main Dyke in Jiangxi"and Its Attachment, "Drawings Book", Jiangxi Institute for Planning and Design ofWater Resource Project, May, 1999

111 "Study Report on Feasibility of Rehabilitation of the Yangtze's Jingnan Main Dyke inHubei", Changjiang Academy, CWRC, December, 1998

123 "Implementation Program for Resettlement of the Yangtze River Dyke RehabilitationSub-project in Hunan", Hunan Institute for Survey and Design of Water Conservancy andElectric Power Project, June, 1999

130 "Implementation Program of Yangtze Main Dyke Rehabilitation Project of HubeiProvince in Application for Loan from the World Bank", Hunan Institute for Survey andDesign of Water Conservancy and Electric Power Project, March, 2000

131 "Resettlement Action Plan of Yangtze Main Dyke Rehabilitation Project of HubeiProvince in Application for Loan from the World Bank", Hunan Institute for Survey andDesign of Water Conservancy and Electric Power Project, March, 2000

132 "Findings of benefit-cost analysis of project", Mr.Colin Green, the World Bankeconomic expert, March, 2000

412 "Cost Composition and Calculation Standard for Budget Estimation of WaterResources and Hydropower Development", Ministry of Water Resources of P.R.C.,January, 1998

4 13 "Ration for Costs Per working Day of Machines Used in Construction of Water

Resources and Hydroelectric Power Project", Ministry of Energy & Ministry of Water

Resources of P.R.C., 1991

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YBFCP/EIA DRAFT FINAL CHAPTER 2: PROJECT DESCRIPTION

2 PROJECT DESCRIPTION

2.1 Project Background

The Yangtze River, 6,300 km in length, with its basin covering 1.80 million km2 ofacreage, is the biggest river in China. It annually discharges 960 billion m3 of waterinto the East sea. The Yangtze basin covers the East, Central and Southwest China,with a favorable climate and rich resources. With gross output value of industry andagriculture accounting for about 40% of the Nation's total, the basin is one of the mosteconomically developed and most important regions of China.

Flooding is frequent in the Yangtze river basin. Flood disasters are usually widelydistributed in the basin. Especially, the 126,000 km2 of plains area in the middle andlower basins frequently suffer from serious flood and waterlog damages as the groundelevations there are commonly several to more than 10 meters lower than the floodwater levels. These flood disasters occur with the frequency of once in every ten years.These historical deluges have caused huge losses to people's property and lives,serious damages to the local ecology and environment, which seriously restricts thedevelopment of economy. For this reason, flood control has always been the first taskfor the basin improvement and development.

The characteristics of the Yangtze flooding phenomena are rather complicated. Themaximum flood peak discharge is not only related to the scope, intensity, movingdirection of the rainstorm, but also the timing and distribution of local floods invarious parts of the river systems. The regional composition of floods is quite differentin different years because of the variation of rainstorm distribution. There are mainlytwo types of floods that usually cause damages in the basin. Flood of the first typeoccurred in 1860, 1870 and 1935. These are caused by extra-high rainstorms in somereaches of the mainstream and some tributaries. This type of flood is usually huge indischarge and high in peak level. The second, such as occurred in 1931, 1954 and1998, is caused by basin-wide rainstorm where floods in the tributaries are similar tothat of the mainstream.

In order to solve the flood problem in the Yangtze middle and lower reaches,Changjiang (Yangtze) Water Resources Commission (CWRC) of the Ministry ofWater Resources of PRC compiled a report, "Summary Report on ComprehensiveUtilization Planning for the Yangtze Basin" [Ref.102], in 1990, which wassubsequently approved by the State Council. The Report points out that flood controlin the middle-and-lower reaches of the Yangtze should follow the principles ofconsidering flood release and storage at the same time. Releasing ranks first becausethis is beneficial to flood control both in the rivers and the lakes, both the banks, andboth the upstream and the downstream. These measures include: properly raising andrehabilitating the bodies of the dykes; hamessing the river channel; planning andconstructing diversion areas; and constructing reservoirs on the Yangtze mainstreamand its tributaries. In addition, the provinces along the Yangtze, mainly Hunan andJiangxi, have been carrying a special program for enlarging the diversion capabilitiesof the "flood storage lakes", such as Dongting Lake and Poyang Lake, and for

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alleviating flooding damages to some 900,000 "Embankment People", i.e., thosepeople living and farming in area in the Lakes and outside the dykes (between dykesand embankments), which are subject to serious flooding. This program includesprovisions for permanent resettlement of some of these peoples and for othertemporary resettlement at time of flooding with provision for them to continuefarming in the flood-hazard areas at times of no-flooding. After these measures aretaken, flood control for the middle and lower reaches can be properly solved, with theYangtze Three Gorges reservoir playing the role of the backbone, adding thereservoirs, diversion works, river channel improvement and non-engineering floodcontrol measures. In the overall system, dyke construction is one of the mostimportant measures to tackle the flood problem in the Yangtze middle and lowerreaches.

As shown in Figure 2.1-1, Hubei, and Hunan provinces are located in the Yangtzemiddle and lower basin. The Yangtze main-stem dykes in the two provinces haveexisted for thousands of years. For example, the Jingnan main dyke of the sub-projectof Hubei was originally constructed about 300 AD. However, these provisions forflood prevention has not been very adequate, although raising and rehabilitation oflevees have been implemented several times. Although flood emergency measureswere implemented during the 1998 deluge, heavy costs have also been paid. The 1988deluge revealed that there are many obvious and hidden defects in the bodies andbases of dykes, which need urgent treatment.

Just after the 1998 deluge, a series of policies were timely put forward in State Council for needsfor flood control improvements learned from the deluge, among which is this project. In order toimplement the policy, the State Commission of Planning has put this project into its executiveplan, including an application to the World Bank for a loan to support construction of the project.the Government and WB have agreed to reduce the scope of Bank financing. Themain changes in Bank financing are as follows:a. Jiangxi province is no longer included;b. Project underwater components, such as cut-off wall, bank protection works, are no

longer included because responsibility for these works has been shifted fromprovincial government to the CWRC (Changjiang Water Resources Commission);

c. More dyke sections in Wuhan have been included and some dyke sections in otherareas in Hubei province are no longer included, and

d. As a result of above changes, World Bank financing participation is reduced fromUS$300 million to US$ 235 million.

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YBFCPIEIA DRAFI FMNAL CHAPTER 2: PROJECT DESCRIPTION

2.2 Project Components

2.2.1 Dyke Rehabilitation

This project area is located in the hinterland of China, involving Hubei, and Hunanprovinces as shown in Figure 2.1-1. Totally 30 cities (or counties, townships,embankment areas) are involved. In Hubei sub-area, the involved and project-protected areas include 22 counties (or cities, townships) under the jurisdiction ofWuhan, Jingzhou, Xianning,Ezhou, and Huangshi cities respectively. In Hunan sub-area, the areas include 8 counties (or cities, districts, embankment areas) under thejurisdiction of Huarong, Junshan, Qianlianghu, Yunxi, Linxiang, Yueyang City,Yueyang County, Huanggaihu, respectively. See Table 2.2-1.

According to the proposal report and the feasibility reports for the Project, the Projectis composed of 5 separate dyke sections on the both banks. The main constructionitems of the project components are briefly described in Sections 2.2.1.1 and 2.2.1.2 .

2.2.1.1 Sub-project in Hubei (See Figure 2.2-2)

This sub-project is composed of following main-stem dyke sections: Jingnan, Wuhan,Huanggang, and Ezhou Bapu. Among these dykes, Jingnan, Wuhan (WuchangSection), and Bapu are on the south bank, while the rests are on the north bank. Thissub-project will involve rehabilitation of 24 segments. The main construction itemsinclude bank raising and strengthening, dyke body grouting by prick exploration,seepage interception by concrete wall, filling-up the platforms inside and outside,filling-up ponds to rehabilitate the dyke basis, revetrnent, rehabilitation andreformation of culverts in the dyke body, dyke-top-road pavement, planting for bankslop protection.

The dykes to be improved are approximately 280km in length and 49 culverts andpump stations will be reconstructed or strengthened. The work quantities are: earth55.82 million mi3 ; concrete of 503thousand mi3 ; steel bar and rolled steel of 3092 t.

2.2.1.2 Sub-project in Hunan (See Figure 2.2-3)

This sub-project involves the dykes of 8 embankment areas of Yueyang City. Themain construction items include: bank raising and widening; dyke body grouting bysplitting and prick exploration; dyke basis treatment, filling-up pond to consolidate thedyke basis, maintaining and prolonging of buildings in the dyke body, construction ofdyke management facilities, equipment and resettlement.

The dyke to be rehabilitated is 136 km in length. 1.4 km flood prevention wall and4.21 km earth dyke will be newly constructed. Some 65 structures (culverts) throughthe dyke will be rehabilitated or strengthened. 62 sinks and nets will be built for snailcontrol (nets will be placed at the outlets of diversion culverts or gates to collectsnails; sinks will be built under the nets to make escaped snails settle). The workquantities are: earth 20.14 million m3; building rock 367 thousand m3; concrete andsteel bar reinforced concrete 172 thousand m 3; steel bar and rolled steel 2,353 t.

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2.2.2 Resettlement

It is proposed to resettle a total of estimated 36,256 people; 1,770,770 m2 houses needto be relocated;3 1404 mu land occupied, of which 1 6050mu are farmland. In Hunanprovince this involves 52 villages, with a total of approximately 4,460 families and19,200 resettlers. Majority of the people to be resettled are rural and earn theirlivelihoods from farm/agricultural incomes.

The Resettlement program of the project has been prepared to take into account allsocio-economic and environmental impacts to both the resettled population and thehost communities. Detailed compensation provisions have been worked out for landacquisition, loss of income form change of livelihood, loss of income duringtransition, budget provision for resettling people in both agricultural and non-agricultural modes of production as well as encouraging new livelihoods in secondaryand tertiary industries. Provisions have been made for providing the resettlers withfarm subsidies, tax incentives and other financial and support measures that will allowboth the resettlers and the host population to reap benefits from the program. Ii Hunanprovince, for instance, on completion of resettlement period (2001), there will be anestimated increase of 53% in total net income from land resources and 57% fromother secondary and tertiary industries.

The resettlement villages will be equipped with adequate housing types and spaces),yard, amenities including water supply, excreta and solid waste management,drainage, power supply, telecommunications, schools and clinics. All resettlement willbe carrned out according to the national policies, laws and regulations withcooperation from local authorities. In brief the following measures are to be taken.

(a) Compensation will be made in advance to the people to ensure smooth progress ofthe resettlement program, so the resettlers will be able to adapt as soon as possible toregain their former condition of production and living, and Resettlementvillages/townships can be constructed and completed according to the constructionschedule.

(b) The Local Governments will cooperate for processing programs to assist theresettlers with tax privileges, loans and credit.

(c) Resettlement of non-rural people: For resettlement of the non-rural people, thelocal governments will designate land in the same cities or towns for them to buildtheir new houses. The original facilities for water and electricity supplies andcommunication will be relocated to the new residential areas by the local relevantdepartments. Some new facilities will be built. Conveniences for medical care systemand schools will also be provided. Livelihood will be re-arranged for those whoseincome sources of life are affected and some economic compensation be made tothem, so they will not lose financially because of their resettlement, including loss ofincome during the transition period.

(d) Resettlement of rural people: The project will occupy rural land includingfarmland, vegetable land, and forestland, fishing ponds and residential land. Forpeople whose houses need to be relocated, new housing areas will be delineated forthem in locations as close as possible to their original areas. For people whose

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production lands are occupied, land allocation will be made in their village to providethem with proper areas of production land, and economic compensation will be madefor them. Economic compensation, privilege credit and technical training will beprovided for the resettlers so that they can pursue other production activities, such astertiary industry or other agricultural and sideline occupation when land resources arelimited.

(e) Compensation and budget allocation has also been made for rehabilitating thesocially and economically weaker sections of the resettled population.

Figure 2.2-4shows typical resettlement areas in Hunan Province. Table 2.2-3 givessummary of substance losses incurred from relocation.

2.3 Environmental Protection Measures

Aiming at flood control, this project itself is an environmental protection project. Itwill markedly improve economics and quality of life in the protected area by greatlyreducing flooding episodes. Besides the direct environmental benefits, the project willalso gain the following additional environmental protection benefits:

(a) Water and soil conservation: Forest and turf planting have been included in theproject plan. Once the engineering work is finished, planting will begin. More than500,000 m2 of wave-break forest and 13,300,000 m2 of turf will be planted. The totalcosts are more than 2million and 45 million yuan, respectively. This will not onlybenefit dyke protection, but also beautify the landscape and conserve water and soil.

(b) Control of snails and schistosomiasis: Killing snail is an effective measure forschistosomiasis control as the snail is the necessary interim host of schistosomiasis.Snail control has been included in the construction program. For example, the sub-project in Hunan has planned to set up sinks and nets at 62 sites for snail control.

(c) Improving the production and living conditions of the resettles: Dyke rehabilitationneeds to relocate some local residents. A special resettlement program has been madeto deal with the resettlement. Refer to literature reference [Ref.123, 124, 125] fordetails. According to resettlement program, some 30000 people are to be properlyresettled.

See Chapter 4 for details of other environmental protection measures.

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YBFCP/EIA DRAFr FINAL CHAPTER 2: PROJECT DESCRIPTION

2.4 Construction Program

2.4.1 Construction Layouts

Construction of the Project will be characterized by the following points: constructioncan only be carried out in dry season before the flood period; there are manyconstruction items which are scattered in areas along the dykes, and a wide region willbe involved. The construction layouts will be made according to the local conditionsand the principles of beneficial to production, convenient for living, easy formanagement, safe and reliable, economic and reasonable" [Ref. 107]. The constructionsites will include a main work construction area, construction material exploitationarea, and management center.

The construction accesses will include waterways and highways. Waterways in theYangtze River, Dongting Lake and many types of docks along them can be used.Existing highways, village highways and rural tractor roads can be used for landtransportation. Some temporary roads will also be built to connect the constructionmaterial grounds and other highways, roads and main construction area.

Sand and rock processing systems will be located near the construction materialgrounds. Electric power supply will be obtained from nearby power networks. Watersupply for production will come from the Yangtze, lakes and ponds; while drinkingwater will be drawn from treated tap water, or groundwater will be used followingtreatment.

Total quantity of excavation is about 4.16 million m3, and that of filling is 44.17million m3, thus a great quantity of fillings is needed for dyke body and dyke basisraising and strengthening. Needed rock materials will be purchased from specialquarries. Earth materials mainly come from construction excavation sites on the dykesand from selected borrow grounds on the river beaches or on hills of the dyke-protected areas. Farmlands have been avoided as borrow grounds as much as possible.Construction spoils have been planned to be used as filling materials for rehabilitatingthe dykes and filling the borrow pits. For few borrow pits without enough fillingmaterials to fill, they are to be reformed into fishing ponds at the request or agreementof farmers. In a word, there is no construction spoil needing special treatment for thisproject.

Figure 2.4-1 shows a typical dyke cross-section and explains typical dyke stabilityproblems.

2.4.2 Construction Methods for Main Items

(a) Dyke raising

This item will include base clearing, slope cutting, filling, concrete grouting, rockscattering, and planting turf and wave-break forest.

Base clearing and slope cutting will be carried out by artificial methods. But auto-machines such as excavator and self-unload truck will be used to replace of manpowerwhere the construction is intensive. Construction spoils will be transported by

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manpower to dyke filling sites.

Filling and construction will be carried out jointly by bulldozer, excavator, self-unloading automobile and compactors.

Mixers will be used for concrete and reinforced concrete production; man-drivenrubber-wheel carts used for transporting the concrete into the bar; shaking machinesused for compacting. Aggregate will be produced in the rock exploitation grounds andsand produced in sand exploitation grounds.

Rock laying construction includes masonry and dry-laid rock construction. The rockmaterials will be purchased from nearby exploitation grounds.

The original need-to-be-removed masonry will be directly cleared with excavator andtransported to filling sites with self-unloading trucks.

Turf pavement and wave-break forest plantation will be planted artificially. Turf willbe dug out nearby and plant seeds will be purchased. Self-unloading automobiles areto be used for transportation.

(b) Treatment of the hidden defects in dyke body

Grouting for the dyke body: Mainly hole grouting will be adopted. The holes will bearranged according to design, and the diameter of each hole will be plainly marked.After grouting, each hole will be filled with mud and compacted.

Grouting for the dyke basis: Triple-tube spray method will generally be applied.Before construction, tests should be made in lab and on the spot. Ratio of all materialsis to be tested in lab, and technical parameters of construction are to be determined inthe on-the-spot tests. Fixed drillers will be used for drilling the holes.

Seepage interception wall: Cement-soil seepage interception wall and flexible-concrete seepage interception wall will be used in the Project construction. The formerwill be mainly used for dykes of rural areas, for example, the Jingnan Dyke [Ref. 1 11];while the latter for urban dykes such as the Jiujiang Dyke [Ref.107].

(c) Revetment

Revetment aims at rehabilitating the banks where there exists serious erosion due toriver flow scouring. Measures include scattering rocks, slope paring, rock-laying andaggregate paving for basis. For scattering rocks, underwater laying method will beadopted, i.e. rock will be transported by trucks from exploitation ground to the site,then orientation boats are used for locating, after that, open-body boats will be usedfor direct laying, or deck boat, or man-power is used for laying.

Paring slopel: Slope paring will be done by men-power or by reverse excavators. Thepaved materials will be transported with self-unloading trucks to spoil grounds or tothe inner platform for filling.

' Pare a cetain layer of earth away from the original dyke slope to meet requirement of the newly designed dykeslope.

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YBFCPIEIA DRAFT FINAL CHAPTER 2: PROJECT DESCRIPTION

Rock-casting Rock-casting construction includes loose stone and masonry laying.Rock mainly comes from the nearby exploitation ground. Before laying, the basesmust be treated with gravel.

Crossing-dyke structures: Construction for crossing-dyke structures will involveremoving wasted old and risky gates, prolonging and rehabilitating existing culvertsand gates, as well as building some new culverts and gates. Construction activitieswill include earthwork excavation, deep-layer mixing piles of the gate base, concreteremoval, masonry removal, concrete placement, paving of loose stone and earthrefilling.

(d) Construction of dyke-top roads

After the dyke body is raised to design elevation, sand and aggregate will be pavedand compacted with rollers, then concrete is placed for the road surface, after that, theroad shoulders are paved to the concrete surface level. See Figure 2.4-1.

(e) Illustration

Seepage interception walls in (b) and scattered rocks in (c) are to be built according toformer layout, but they will be implemented with domestic fund not with WB fund.

2.4.3 Construction Schedule

According to the project proposal reports of the three provinces, the overallconstruction period lasts for 3 years, in which, 3 years (1998.10-2001.6) for Hunansub-project and 3 years (2000.8-2003.6) for Hubei sub-project. For Hubei, Jingnandyke, Huanggang dyke and Wuhan dikes need 3 years to be completed and Bapu Dykeneeds 2 years.

Most of the project construction items can be carried out only from October to Marchexcept for a few items due to flood influence. Therefore, the construction of theProject reflects seasonal characteristics.

Scheduling for each dyke should be made in consideration of its importance anddegree of risk. Key dykes and dykes of highest risks will be given priority attention.

2.4.4 Summary of Construction Program

Construction of the project is characterized with seasonal performance, extensiveinvolvement, and high degree of mechanization. The construction will be laid outaccording to the following principles: keeping in coincidence with the local condition,being beneficial to construction, convenient to living of the constructor, easymanagement, safe and reliable, economical and reasonable [Ref.107]. Constructionmethods to be adopted are the commonly used ones in China for rehabilitation ofdyke. The overall schedule is shown as Table 2.4-1.

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2.5 Comparison of Alternatives

In the feasibility study stage, several alternatives have been studied. Their main pointsare discussed below:

2.5.1 Non-project Alternative

Because the dykes have existed for a lonig time, although maintenance of the dykeshas been carried out quite often, they still fail to reach the design standards [Ref. 103,104, 106, 107, 111,130]. Main problems of these dykes are as follows:

(a) Because the dykes were built many years ago, the soil texture is complicated, andthe dyke body is often not of good quality. There exist conumon leaking phenomena.As the dykes are thin and low, sub-dykes often need to be built temporarily in a hurrywhen deluge comes, which usually consumes a large quantity of man-power andmaterials, and seriously affects the industrial and agricultural production in the areas.In addition, damage by termites, by making their homes in the dyke-body, is Veryserious in many dyke sections and is often the main cause for bank-burst risk.

(b) Geological condition of the dyke basis is rather poor, being usually of dualstructure. The upper layer is usually thin and impermeable, while the lower layer isthick and highly permeable with the composition of silt sand and cobblestone.Besides, there are a lot of ponds that usually have close contact with the outside river.For these reasons, piping can often be seen during flood season.

(c) River channels of some local sections, such as the Jingjiang section of the Jingnandyke, are not stable. When deluge comes, flood flow usually erodes the bank andcauses serious collapse. As a result, the beaches become narrower and narrower, andeven disappear, which hides many dangers and seriously threaten the safety of thedykes.

(d) There are many culverts of various sizes and gates in the dykes, most of whichwere built from 1950s to 1970s. Metal structures of many culverts and gates becomeeroded, the open and close facilities are aged. Besides, the bodies of gates are caved into different degrees, and there exist many hidden defects such as decline, cracking,and culvert pipes not properly joined because of contraction and expansion.

The above-mentioned problems show that if the dykes are kept in the presentcondition, they will not be able to defend against the 1954 or 1998-type floods. Whenthe floods occur again, much higher cost will have to be paid. In the light of 1998price levels, the annual loss incurred by flood is estimated to be higher than 100billion yuan with this project not implemented.

It is concluded, therefore, that rehabilitation of the dykes is urgently necessary in orderto protect the local people's lives and properties, and improve the regional ecologyand environment. The dykes are of primary importance in the overall flood controlprogram as noted in Table 2.1-1.

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2.5.2 Other Alternatives Considered

(a) Diversion and Storage Project

The Yangtze flood is usually high in flood peak level, huge in volume, but the riverchannels in middle and lower reaches are limited in discharge capacity. Diverting andstoring the extra floodwater is an effective measure to protect important areas.However, it is difficult for diversion and storage projects to solve the flood problem inthe middle and lower basin alone. The planned diversion and storage projects, with atotal storage capacity of 50 billion m3 [Ref£101], depend on dykes and the upper basinreservoirs to play their roles, or they cannot be used to hold the extra flood water ofthe 1 954-type. In addition, most of the diversion and storage projects constructed after1954 have never been used for diversion, and industrial and agricultural productionhave been developed in the project areas. Moreover, the population has increasedrapidly; the huge population will be difficult to be transferred and economic loss willbe great once these projects are put into use.

(b) Raising the dykes higher than the design standards

Dykes are the basic facilities for flood control in the Yangtze middle and lower basins.Raising the dykes by standards higher than the design standards means furtherincrease of the designed dyke-top elevation to a height that can prevent the 1954-typeflood. However, this would bring forth a series of problems. This is because themaximum flood peak level will be 2-3 m higher than the actual level under conditionsof non-diversion and non-bank bursting. If the dykes are to be raised by 2-3 meters, itis preliminarily estimated that 7.6 billion m3 of earth will be needed, more than 1.60million mu farmland will be occupied, and about 1 million people will be resettled.Besides, hundreds of thousands of culverts pump stations and bridges need to bereconstructed. Obviously, this would be very difficult to implement. Furthermore, asthe geological conditions of the dyke bases are not good, the dykes are easy to burstunder the condition of high water level, which will incur with very high flood flows.For these reasons, the dykes cannot be further increased in height.

(c) Non-physical flood control measures

Non-physical flood control measures are the important components of flood controlsystem. These measures mainly include: Establishing flood pre-warning system;improving the command system for flood prevention; planting water conservationforest; setting up public insurance system for flood risk; and training associated stafffor flood control. However, it should be pointed out that these non-physical floodcontrol measures alone would be ineffective.

From the above analysis, the following can be concluded: Scheme (a) is ivory-towered; Scheme (b) is excessively costly in needs for man-power and materials withreturn of even greater risk, therefore, it is not reasonable. The two schemes cannot beindividually applied or should not be replaced by each other. To sum up, the proposedproject is the only feasible alternative.

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YBFCP/E1A DRAFr FINAL CHAPTER 2: PROJECT DESCRIPTION

2.6 Project Economic Analysis

2.6.1 Introduction

Economic analysis of the Project is based on information from literature references[Ref.104, 106]. The national economic assessment for each sub-project is mainlybased on provisions stipulated in "Norm for Economic Assessment of WaterResources Project (SL72-94)" [Ref. 407], present financial and tax systems, andassociated policies of China. Shadow prices are applied for calculating costs andbenefits of project. The basis and method used for the economic assessment are inaccordance with China's associated provisions. But in benefit-cost analysis of projectcarried out by Mr. Colin Green, the World Bank's economic expert, the role of TGP inflood control, employment of diversion works and effect of dyke rehabilitation havebeen taken into consideration, which makes the achievement more reasonable (Ref.129). Therefore, Mr. Colin Green's achievement is referred to in Section 2.6.3.

2.6.2 Project Budget

The project budget is estimated on the bases of the designed quantity of work and theconstruction scheme. Reference has also been made to "Water-Construction [1998]/No.15, Cost Composition and Calculation Standard for Budget Estimation of WaterResources and Hydropower Development" issued by MWR [Ref. 412], "Ration forCosts Per working Day of Machines Used in Construction of Water Resources andHydroelectric Power Project" [Ref.413], and associated documents of the threeprovinces. The price level at end of 1998 is adopted, and the exchange rate of U.S.dollar to RMB(Y) is 1:8.3. The total investment of the project is estimated to be about4 billion yuan (inner capital 2 billion yuan, plus foreign capital 235 million U.S.dollars).

2.6.3 Benefit-Cost Analysis

The benefit-cost analysis was complex with a number of benefit streams to beconsidered and a number of conditions to be considered. The following benefitstreams were considered:(i) Reductions in flood losses arising as a result (a) of the dike raising and (b)reductions in the probability of the dike breaching as a result of dike strengthening;(ii) Reductions in flood fighting costs;(iii) Reductions, in some instances, in the costs resulting from the use of the detentionbasins (i.e. the costs of evacuating the population as well as the resulting flood lossesto activities within the detention basins); and(iv) Reductions in 0 & M costs.In addition, the project will be completed before the Three Gorges Project becomesoperational. Therefore, two baseline conditions had to be considered: with andwithout TGP, and the project benefits against those two baseline conditions had to beintegrated.Flood losses: China has perhaps the best information on past flood losses of anycountry in the world; the national code requires that sample surveys be undertakenafter any flood to determine the losses experienced by different types of land use.Therefore, the existing loss data were used in the analysis.Loss probability curves: However, very limited data was available as to flood extents

2-11


and depths as a function of the return period of the event. Therefore, growth curvesfor the magnitude of the flood loss as a function of the return period of the event hadto be synthesized based on some limited data. Sensitivity analysis was then used totest the effect of changing the form of this curve.

Summary results: The estimates of project's benefits in each of the two provinces aregiven in Table 2.6-1.

These results were prepared using conservative assumptions, notably concerning thetiming and extent of the effects of the Three Gorges Project. Where TGP has aninfluence on the flood losses then the effect is a dramatic reduction in project benefits.The differences in results between the three provinces are principally a consequence ofdifferences in the predicted affect of TGP at different points downstream. A secondcontributory factor is the differences in the different benefit streams it was possible toevaluate in each of the three provinces. The above results should not be used tocompare the project/s impact on the three Provinces for this reason.

Sensitivity analyses, undertaken by varying the key parameters that affect themagnitude of the benefits, demonstrated that the b/c ratio is much greater than one ineach province.

2-12

YBFCP/EIA DRAFI FINAL CHAPTER 2: PROJECT DESCRIPTION

2.7 Project Management

2.7.1 Introduction

The Project involves a large area and the construction area is in the shape of long beltsalong the Yangtze River [Ref.104, 106, 107], therefore, project management is veryimportant. Institutions for project management will be established and staffed to beresponsible for project management and operation.

2.7.2 Establishment of Institutions

Because this project involves use of foreign capital, the administrative requirements ofthe foreign agencies for such loans will need to be accommodated. A lead group and aproject management office are to be set up in each of the three provinces formanagement of its component of the project. A coordinator will be responsible forcoordination of project management and environmental management among the threeprovinces. A lead group and a project management office will also correspondingly beset up at each level of prefecture and county. The lead group is composed of theprincipals of government, commission of planning, departments of water resources,finance and environmental protection of the corresponding levels. The projectmanagement office comprises engineers, economists, accountants, lawyers andenvironmentalists with adequate experience. The office will include an integrationgroup, an engineering group, a financial group and a consultant group, responsible fororganization of implementation, coordination, money raising and spending, invitingpublic biding and purchasing materials, and an EMO for implementing all EPMsspecified in the EIA. Institutions of lower levels have the responsibility for reportingtheir work to upper levels. Water resources departments of the associated provinces,cities and counties are responsible for designing, supervising, checking and acceptingthe project items; financial departments in charge of financial evaluation, giving outand returning the money as the intermediators. All the project management institutionswill follow the guidance of the International Expert Panels that are composed ofdomestic and overseas experts. Figure 2.7-1 shows the framework of the projectmanagement system.

2.7.3 Project Management

Management of this project will follow the system that the owner is responsible for allaspects of the project. In addition, systems, such as construction supervision,environmental monitoring, inviting public biding for purchase, contracting, will alsobe set up. Each project management institution is responsible for the construction andoperation of the project items in its territory. This includes the EMO responsible forenvironmental protection. Computers will be used for management of all theinformation of the project.

2.7.4 Technical Management

(a) Technical management: In order to enhance their performance, the projectmanagement personnel, technical personnel, and environmental protection personnelwill be trained according to a plan. These personnel include women.

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(b) Technical consulting: The government, together with the World Bank, willestablish International Expert Panels, comprising Chinese and outside experts, whichwill meet periodically (say every 6 months) to review Project performance to ensurecompliance with the Loan Agreements. For environmental purposes, these Panelsinclude an International Expert Panel on Environment and an International ExpertPanel on Resettlement. The panels will assist the Project Management Office incarrying out the various tasks as shown in Figure 2.7-1. The number of Panels to beset up, in addition to the Panels for Enviromnent and RS, will be decided by theGovernment together with the Bank. The Panels will be administered by theGovernment on behalf of the Government and Bank, but the Panels will report to boththe Government and the Bank.

2.7.5 Financial Management

Local corresponding departments of finance and the financial group of each office willbe responsible for money raising, yearly plan making, money giving out and gettingback, financial balancing, setting up and completing account books. Financial auditingand supervision will be carried out for each item of the project. All the required fundsof the project construction and environmental protection must be properly managed.

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2.8 Summary and Conclusions

Chapter 2 presents a brief description of the overall Project, including its sub-projectsin the two provinces involved in the project area, as shown in Figure 2.2-1. Moredetailed drawings are prepared for each of the two sub-projects.

Project Components

The overall YBFCP Project is actually an environmental protection project whichincludes (i) the civil works for rehabilitation of the dykes; (ii) the Project jEresettlement program; (iii) environmental protection components, and (iv) the non-physical project components including institutional systems for flood hazard warningand for actual flooding assistance operations.

Civil Works

The total length of the dikes to be rehabilitated is about 416km (Hubei: 280km,Hunan: 136 km). The civil works of the project mainly include dike raising andwidening, dyke body grouting, dyke foundation treatment, near dike pond filling toconsolidate the dyke basis, and strengthening and prolonging cross-dike structures.The sub-projects in two provinces are all designed in consistence with the YangtzeBasin Flood Control Master Plan prepared by the Changjiang Water ResourcesCommission.

Environmental Protection Components

The environmental protection components which have been incorporated into theProject include the following:(a) Forest and grass planting: Some 500,000 m2 of wave-break forest and 13,300,000m2of erosion prevention grass will be planted on the dike slopes with a total cost ofabout 47 million yuan;(b) Borrow area resurfacing after borrow activities completed; and(c) Schistosomiasis control measures including borrow pits filling, snail sinks, andsnail nets;

In addition, environmental protection measures included in the contracts of civilworks contractors are i) water, air, noise, and solid waste pollution control, ii)protection of worker's health, iii) prevention of soil erosion, iv) protection of aquaticecology and migration birds, v) protection of cultural relics, and vi) control of landuse.

Project Alternatives

The possible alternatives considered for the project mainly include:(a) Non-project (doing nothing ) alternative;(b) Flood diversion and storage projectto enlarge flood diversion areas and increase flood storage capacities, and (c) Highdyke alternative;

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Non-project AlternativeDetailed analysis showed that many reaches of the present dikes with a history ofhundreds years, now have many defects, weak and dangerous sections, poor andperneable foundations, and aged cross-dike structures. If the dykes are kept in thepresent conditions (doing-nothing alternative), dike failures could occur in manyplaces resulting serious flood disasters with thousands even hundreds of thousandspeople killed and over 100 billion yuan economic loss if 1954 or 1998 type floodsoccurred.

Increasing Diversion and Storage Capacities

The proposed diversion and storage projects, with a total storage capacity of 50 billionmi3, depend on present dykes and the upper basin reservoirs to play their roles, or theycannot be used to hold the extra flood water of the 1954-type. In addition, most of thediversion and storage projects constructed after 1954 have never been used fordiversion, and industries and agriculture have been rapidly developed in the planneddetention and storage areas. Moreover, the population in the area has increasedrapidly; the huge population will be difficult to be transferred and economic loss willbe great once these projects are put into use. Therefore, the alternative (b) is notpracticable.

High Dike AlternativeAnalysis shows that the maximum flood peak level would be 2-3 m higher than theactual water level of the floods of 1954 or 1998. If the dykes are to be raised by 2-3meters, it is estimated that 7.6 billion m3 of earth will be needed, more than 1.60million mu farmland will be occupied, and about 1.0 million people need to beresettled. Besides, hundreds of thousands of culverts, pump stations, and bridges needto be reconstructed. Furtherrnore, as the geological conditions of the dyke bases arenot good, the dykes are easy to burst under the condition of high water level, whichwill cause much great disasters. Therefore, alternative (c) is too costly to beimplemented with even greater dyke failure risks.

It is concluded that the present project, as a key component of the overall YangtzeFlood Control Master Plan, is absolutely necessary and is the only feasible alternative.

Chapter 2 also includes brief review of (i) the Project's construction program; (ii)Project econornic analysis, including costs and benefits, and (iii) the Project'sinstitutional system for managing project planning and implementation.

Table 2.4-1 summarizes the construction schedule for the project.

Table 2.8-1 is a summary of the salient- characteristics of the overall Project.

2-16

figure 2.2-1 1 4 * t -tt I W- J Dike Sections Involving World Bank Financing in Project

'0 0000., 0 1 020 304050 60 70h' . --

N

J ~ ~ ~ ~ \. ~ ~ ~ ~ ~ a. ..~~~~~~~ o,~~~~~. Jun xl Pi-ovin~~~~~~AnulPrvi

i ~~~flhII~~~~~1~~TOVIflCC /A *. - ~~~~~~~~~~~ N ~~~~ 0 3 N ~~~~~

Source: ETA Team / 1)) '~~~~~~ V>0

- " "'' '' Hubd" oinceb6~~ O

Figure 2.2-2 , it : A R 1A; ;t mlLocation Map of Dike Se lions in Hubei Province

10000m 0 10 20 30 40 50 60 70km

JI F--1--, t a wu J J

Un Province~~~~~~~~~~~~~~~~~~~~~~~~~~nV-Ij W fi </7 1 vk^A*njjzimJT t=me unisluidinTlislinct~~~~~~~~~~M L iou>/T<:^ut= ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~"jw. H g*, e R = D, f -,(

N

Figure 2.2-3 -,M r fX T ^ ; Location Map of Dike Section in Hunan Provincc

// /d\ /Ft(

| Jj¢ i*Lt4 3 t g <,1 Legitn dHubei Province

SamhouliaA~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~Cll E,sl = y ' irerntk

__ _ _ .__.___. .. __ __ __ __--

RI/1~~~~~~~~~~~~~~~~ / ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~~~l,IteblWiri mc

'J-~~~~~~~~~~- /~~~~~~

Hlunan Province o .,I, 1oni Budre

culn t ((e Re, Lake

Figtirc 2.2-4 A j W 1-6 V% ; 5 ! 1 3;( -Ar -C) It ffi1

Typical Rk -ctllement Area Location in Hunan Province

N

25.

=Hubei Province

2 r

~~~~~~~~ ~~~~~~~~~~~~~*INI* Pesidiencc of RcseNtl--

t - a # > mA ;*p't ,''/'z 0

71 t t \t/-*4^ 4 )>LegendK 0~~~~~~~~~~~~~~~~~~~~~~~~~~~~i CJ, '; 1ri _) s t 8 \ / to 9C'.CX'IAt | I Current Localgon of PCo.ple PoviniMa Boundaries

\JI\ ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~Rive's I Lake%

Blridges Lc.e e, nH ,, b

Flood Diversion Gate% Mabr t aMajor Road

\lE- Safi, Platforn Counties Cihes)3tyA 1 l Y,.ejang Boundaries

/ | m jiAr AN, ________ M u

Note: Cuirrently people rcside ut1 various locations along the Dykc Culvert Gates Planning Road

2.4-1 g-R |ti jlhot1 mT T,'

FIGURE 2.4-1 SCHEMATIC DRAWING OF TYPICAL DIKE SECTION

Fhk Wave-brcak wall

0I' Cutoff wall FM I RoadV34.47m UirlnlfirJii Designed dyke section

Designed flood level :3.0 t roof by pressed and dipped

vi_iti4LA t. 32.47m 1:3.0

il- I Q§J8 1:3. M / \ 7su ~ t :3.0 Jiffiil Ground

Original slope surface to be pareoJ- Original dyke section A/-__?

Designed low water leveT \ / - "sX1A)JVik Pondstobefilled

V ittiA~ ~ix 20.$1 $ PJR Slope protection with prefabric co crect'rc tCi11 Original ground line

f iT IitsiM ]aggregate pavingsi4tJ'PJ)t Slope protcction with grecnsward

\ #XiY'';t Bank protection with jacked stone

tI¶t i IsftJ ŽThJ#§ 'b, w 1 'i ii!t;-;f ffzl IAtl§WlF f-R7(JlTh il i4Wi# J~j2{ I.II.}-)I -tjtt

Note: Besides slope protection with prefabricate concrete, masonry and loose stone laying, ttirf paving and wave-break forest plantation

will be done on the bank slope. Grouting of termite forinicaries is considered in construction of intercept wall. TFlercinlto intercept wall and

jackstone project will still be constructed according to former layout with domestic funds but not withi Wil loan.


Figure 2.7-1 Sketch-map of the Project Management System

Project Management Director

Project Management Offices

onstruction inancial onsul tivedepartment RS Office EMO epartment epartnient

Engineer ECIs (including environmentalSupervisor supervisor)

csE

Table 2.1-1 Condition of Dykes Involved in ProjectStarting and ending D)yke Crest lheighit Crest

No. Subitenits Location points length (m) width Slope ratio Dyke hazards_________________ ~~~~~~ ~ ~~~~ ~~(kini) __ _ _ _ _ _M__ _ __ _ __ _ _ _ _ _

Songzi dyke Zlwt'fi-igiawa 2.24 0.4-1.14intnoberaisd 5-7 ) : 251-: 2.87 1: 2.7-1: 2.8 Piping, scattered seepage, wave scouring, outer bankJingnan truck _________failure, etc.

1 dyke of the ruk ngAlo IU de OMgia~WnPiaEti 1026 0.4-1.4mtobe raised 5-7 1 2.8-1 309 1: 3.09,1: 3 22Yangtze River GCgxantnrkdyke W iaiXint 96.00 0.5- i 29m to be raised 4-6 1: 2.66-1 3-36 1: 2.5-1: 366

Shishou dyke XinLCkipu' mtw 80.82 0.7-1.93mtoberaised 5-6 1 2.1-1 3.8 1: 2.97-1: 3.44Siyonggong dyke . 17.19 29.56-31.18 4-10 1:3 1.3

Wuli dyke 3' l|W ta 4.6 29.57~30.53 3-7 1:3 1:3

Wujin dyke Jinrd Wutaiilia 29. 067 28.92-29.93 . Piping, wide seepage, leakage hole of clean water and mudWujin____dyke__ YgotYAaa 2907 292993water, softened inner dike foot, bank failure

Cantonal dyke WiVaiAia-Xiadnhe 21. 08 29.62-30.12

Wuhui dyke lf =hnini 24.62 28.3-30.42 6-8 1:3 1:3Junshan dyke Xiwjtx al*nst 6. 8 29.09-30.24 6-8.5 1:2,5 13

Wuhan trutik Shaniao dyke h 1. 7 29.09-30.63 6-7 1:3 1:32 dyke of the Zhulinhu dyke H=WindQiawan 1.85 28.83-30.63 5-6.5 1:3 1:2.5

Yangtze River Lanlihu dyke Xa Hu h 6. 5 30.07-30.37Jiangyong dyke Thichuk-Xujiabo 3. 72 30.07-30.57

Yingwu dyke Tatchu;"u-9w ai 6.93 28.92-29.92Yanjiang dyke !Iii in Dijia 12. 99 28.94-29.65Chenjiaji dyke DitiK-lxluoxku 5. 7

Wuhu dyke X liui 18.765 28.156-28.67 6-15 1:2.5-1:3 1:2.5-1:3Chaibohu dyke VtUnXiagdushan 5.04 28.542-28.708 8 1:3 1.:3Dulong dyke l lha 29.25 27.509-28.402 8 1:3 1:3

E'zhou trunk Piping, wide seepage, wave scouring, cracks, slope flake,3 dyke ofthe 13apu dyke MuagltetoYangm(ikte 43.60 26.0-28.0 8-12 1: 3 1: 3 bank failure

Yangtze River__ ___ _ _ _ _ _ _ _ _ _ _ _ __ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _

_ ruaggngTrn;Chanigchejig dyke 30.775 28.21-30.20Hluaniggang Trunk Caghn ye___

4 dyke of the Xujialiu gate- 6-8 1: 3 1: 3 Leakage of dike base, shallow covering layer, piping, leakagYangtze River Dulong dyke Liuifangwan 15.541 28.3 -34 of clean water

Upper sector of Huiar I : 4.0-1: 5.5 wave scouring, piping, landslide, slope flake, ternite hole ulunan trunk dyke tnnk dyke Wuthlxp 76.02 35-36..5 7-8 (inside and outside total slope) d ykes

5 of the Yangtze .River LoversectorofJiangxtdi lIt1IOi5le 1Ztfl .61.024 34-35 5-7 1: 2.0-1 : 2.5 1: 1.5--i: 2.5

tead traink dykeNote: This table is prepared accordinig to reference litelauaTetRel. 103,104,106,1071

YBFCP / ELA FINAL REPORT CHAPTER 2: PROJECT DISCRIPTION

Table 2.2-1 Project Components and Protected Area

Province Sub-project Involved and Protected Area

Jingnan Dyke Jingzhou city: Songzi county, Jingzhou district,

GongAn county, Shishou city

Wuhan city: Wuhan city, Hanchuan county,Wuhan Dyke.

Hubei W Xiantao city, Qianjiang cityV

Huanggang city: Tuanfeng county, HuangzbouHuanggang Dyke district, Xishui county, Qichun county, Wuxue county

Ezhou Bapu Dyke Ezhou city and Wuhan city, Huangshi city, partof Xianning city

Yueyang city: Huarong county, Junshan district, Qianlianghu

Hunan Improving Yangtze embankment area, Yunxi district, Linxiang city, downtown area ofDyke

Yueyang city, Yueyang county, Huanggaihu embankment areaNote: This table is prepared according to reference literature [Ref.103, 104, 106, 130].

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Table 2.2-2 Summaries of Main Quantities of Work of Project

Excavation Fill-U3P Masonry Concrete Gravel Grouting Reinforced Wave Break Turf revetment High pressureProvince No. Sub-project (104m3) (10 m ) (104

m3 ) (104mn) (104m3) (km) Steel (t) Forest (10) (104M2) Spray (m

2 )

I Jingnan Dyke 88.11 633.01 4.42 1.62 6.01 8.00 146.47 66.25 84.29

2 Wuhan Dyke 152.26 1468.07 22.02 53.19 5.08 112.6 1648.7 30.05 623.21Hubei

3 Ezhou Dyke 0.28 169.45 2.21 0.06 4.99 43.60 46.99 15.36 33.65

4 Huanggang Dyke 42.33 319.19 8.50 2.41 6.25 24.00 1250.20 120.78

Hunan 5 Yangtze dyke in 132.82 1881.43 36.73 17.19 19.90 2353.00 469.97 88800Hunan Province

Total 415.8 4471.15 73.88 74.47 42.23 188.2 5445.36 111.66 1331.9 88800

Note: This table is prepared according to reference literature [Ref.103, 104, 106,130].

N'BFCP/EIA FINAL REPORT CHAPTER 2: PROJECT DISCRIPTION

Table 2.2-3 Summary of Propertv Losses Result from Relocation

Item Unit Hubei | Hunan Total

Quantity Quantity

1. Relocation

a) household 4011 4,644 8.655

b) resettler Person 17043 19.213 36.256

c) removed house M2 741.770 1.029,000 1.770,770

2. Land occupation Mu 12.827 18,577 31,404

a) Farmland Mu 5,911 10,139 16.050

b) Fish pond Mu 2.841 1,213 4,054

c) Forestland Mu 3,504 2,443 5,947

d) Others Mu 3,825 4,781 8,606

3. Infrastructure

a) Hig voltage km 128.71 49.60 178.31transmission line

b) communication and km 455.7 133.27 588.97broadcasting line

4. Others

a) Fence wall m2 127,971 87,386 215,357

b) Bleachery m2 303,900 160,031 463,931

c) Well Pcs 143 1,240 1,383

d) Scattered tree Individual 66,638 143,903 210,541

Note: This Table is prepared teferring to Ref 123, 124, and 125.

2-20

Table 2.4-1 Construction Schedule

Province Major Year 1998 Year 1999 Year 2000 Year 2001 Year 2002 Year 2003

Items 8 9 101 12 1 2 3 _ 5 6 7 8 _ 101 12 _ 1 21 3 4 5_ 6 7 81 910 11|12 121 3 4 5 6 7 8 19 t 11 12 1 2 31 4 5| 6 7 8 9 10 11 12 1 21 314 56

Construction

PreparationHubei Dyke body

Dyke base

Crossing-dykestructure

Dyke body _Hunan Dyke base

Crossing-dyke

structile is -aNote: This table is prapared accordiong to reference literature[REF. 105,106,1301.

YBFCP / EIA FINAL REPORT CHAPTE R 2: PROJECT DISCRJFTION

Table 2.6-1 Summary of Economic Analysis of Project

Net Present ValueProvince Benifit-Cost Ratio Internal Rate of

(10.000 vuan) Return (%)

Hunan 290,018 2.7 35

Hubei 978,263 5.0 55

2-22

Table 2.8-1 Summaries of Project Characteristics

No Items Unit Quantity Remarks

I Design flood Jingjiang reach can fight 100-year-recurrence flood at Zhicheng, the reach below Chenglingi canfight flood of 1954-type.control standard

2 Designfloodlevel M Shashi 45.0, Shishou 40.08, Jianli 37.23, Chenglingji 34.4, Ltuoshan 31.63, Xintankou 31.44,Wuhan city 29.73,Huangzhou 28.20, ITuangshi 27.50, Wuxue 24.50, Xiaochi 23.25, llukou 22.50,(Wusong elevation)

3 Benefits from flood control

(a) Total area kM2 14834.78

(b) Farmiand area 106 mu 926.47

(c) People protected 106 person 1254.62

4 Main structures

(a) Earth dyke

Property of the dyke Duality structure

Maximum height of the dyke M 13

Width of the dyke-top M 8- 10

Ratio of inner to outer slopes I : 3

Length of dyke Km 416

(b) Flood control wall

Type

Maximum height M 12 Hubei

Length Km 19.2 Hubei

Note: Planning for each province is consistent with TOR for Overall basin flood control plarning by Yangtze Basin Commissioni.

Table2.8-1 Summaries of Project Characteristics (Continued)

(c) Revetment

Type of revetment

Thick of revetment M 0.1/0.3

(d) Treatment of seepage segment

Methods(dyke body/basis)

(e) Structures crossing the dyke

Reconstruction and Rehabilitation Set 114

5 Resettlement and land occupation

House relocation m2 1,770,770

Population to be resettled Person 36,256Land occupation Mu 31,404

In which, farmland Mu 16,050

6 Project construction

(a) Materials and labors

Reinforced bar and steel T 5445.36

Total labor days 106 days 29.898 Hunan

(b) Overall construction period Year 2 - 3

7 Project-budget-Estimate

Total investment 109 About 4.0 Domestic and foreign capital

Economic net present value 109 Domestic and foreign capital, Hubei 97.8, Hunan29

Table2.8-1 Summaries of Project Characteristics (Continued)

Ratio of benefits to costs 2.7-5.0 Domestic and foreign capital, Hubei 5.0, H4unan2.7

8 Project management and institution Including project management and environmental management. Institutions of project managementestablishment and environmental management will be set up at levels of province, prefecture and county,

respectively in the three provinces. A coordinator fromi the World Bank will be responsible for thecoordination.

(a) Institution for project management Composed of project leading groups and project management offices of all levels, responsible forproject management, technical management and financial management.

(b) Institution for environmental Composed of environmental management institutions of all levels, responsible for organization ofmanagement implementation of environmental protection measures and environmental monitoring, dealing with

environmental accidents.

(c) Environmental monitoring plan A dozen of parameters, such as resettlement, land usc, aquatic life, public health, dyke stability, is to-o _________________________________ _______ ________ be monitored, referring to Chapter 5 for details.

9 Comparison of alternatives non-project and other alternatives are considered at this stage.

(a) Non-project altemative Analyzed are problems of existing dyke and thieir-induced economic losses uinder non-project.

(b) Other alternatives Including diversion and storage pi-oject, Raising the dykes highier than the desigined standards, andnon-project alternatives.

Note: This table is prepared according to reference literature [Ref.103, 104,106, 129,130,131].

Documents

DESCRIPTION OF PROJECT/2000 FOR YANGTZE DYKE …...2.1 Project Background 2.1.1 Yangtze River and Flooding ... considering flood release and storage at the same time. Releasing ranks