By Prof. Mahesh D. Desai (Ph.D.), Visiting Professor, AMD, SVNIT, Surat. Consulting Engineer, EFGE Consultant, Surat. TRENDS, BOUNDARIES AND WATER

By

Prof . Mahesh D. Desai (Ph.D.),

Visiting Professor, AMD, SVNIT, Surat.

Consulting Engineer, EFGE Consultant, Surat.

TRENDS, BOUNDARIES AND WATER

Water Resources of Next Decade - Projections for Gujarat:

Workshop on Ground Water Management and Water Use Efficiency in State of Gujarat, Union Territory of Daman & Div.

Chairman: B.N. Navalwala (Advisor to Chief Minister). Recommendation:Use of existing dam storages for recharging fast depleting aquifers in Gujarat.

SEARCH OF NEW SOURCE FOR URBAN WATER SHORTAGE, 27/03/2009

Continue…

Study: a) Underground storage potentials.b) Source of surplus water in basin.c) Inter basin transfer of resources for MAR- Managed Aquifer Recharge.d) Ground water quality surveillance. Projection & warning:Alarming decline in annual water availability in most parts of Gujarat to 400 m3/ capita for 2020. (Water level to minimum for scares condition is 2000 m3/capita/year)

Flood in Tapti around Surat spill on banks of river Tapti flooding sq.kms even with releases of 2 - 3 lakhs, can be harvested to by recharging aquifers.


Facts & Data available:

Ukai will have less inflow in next decade

Tapti Basin:

Total Ground Water Recharge Potential: 633.83 MCM / year

Usable Ground Water Recharge: 507.10 MCM / year

Usable Ground Water Recharge Withdrawal: 168.65 MCM / year

Balance of Ground Water: 338.45 MCM / year

(Source: G.W.S.S.B., Gandhinagar)


Saline Land Growth: 1 lakh hectare / year (Source: Bureau of Soil Survey & Use)1960 - 6.2 % Kharland, 1989 - 15.8 %Present - 27.17 % Salinity within 2 km belt on coastline: 3500 ppm (not suitable for irrigation & other uses) Surat District’s saline water area: Bardoli, Choryasi, Kamrej, Mahuva, Olpad, Palsana, Valod, Vyara Saurastra: Year 1957 to 2000 average annual rainfall: 250 – 380 mmYear 2001 rainfall: 455 mm


Conservation of Resources for Survival:

Source:Only flood water for South Gujarat & Narmada Canal for Central Gujarat Conservation of Flood:No storm drains for discharge to saline water i.e. river Tapti, Kim, Mindhola in lower reachesNetwork to intercept storm to pond (Flood Detention Reservoir) on Kahrland on coast (Combined coastal protection / highway)Recharge by bores in R.L. (-) 3 to (-) 15 m by wells / bores seepage to river ponds & weir storage.


Plate – 1 shows schematic diagram for Flood Water Conservation SchemePlate – 2 shows the Land Reclamation for Slum Rehabilitation

Sketch showing the sectional details for proposed Integrated planning with Coastal Highway & Flood Detention Reservoir

SEA

RIVER TAPI

CITYF.D.R.

H.T.L.(+) 5.5 m

L.T.L. 0.0 m

+ 8.0 m + 8.0 m

+ 13.0 m

+ 9.5 m

H.F.L.+ 12.0m

0.0 m

Spill/Road/

River FrontCoastal Highway

RIVER Front

Development

Storm drainbelow roadSurface drain

To Sena, TenaCreek & Kim River

Plate shows flood, spills, barrel direct drain to act as storm drains interceptor, surface drain network to divert flood water to

major khadies redeveloped, Tena, Sena, Kim, Mindhola.

+ 7.0 m

PLATE- 1

Ballon Spill way Recharging

+ 5.5 m

Sea

(-) 10.0 m

+ 8.0 m + 5.5 m

+2.0 m

(-) 4.0 m W.T.

KHAR LAND

R

O

A

D

S

E

A

LAND, +6.5

WATER +5.5

Desalination

• Excavation Lagoon

• Soil F.A. reclaiming Land…25 Million SQM

• Store & Recharge Water up to 100+20 million CM

PLATE- 2

MULTIPURPOSE PROJECT TO MAKE OPTIMIZATION OF WATER.

ROAD

GREEN BELTCOASTAL HIGHWAY

CITY

Flood Detention Reservoir with Ballon dam spillway:

Coastal Area of Hajira, Olpad. - Tena Sena Creek & Kim River

Coastal Area at Mouth of - Mindhola River


Flood Detention Reservoir- Mindhola River


Linking of Village Ponds (reserved) for no source villages

Pond

PondPond

River Tapti

FDR

FDR

Pond

Pond

Pond


NH-8.

Proposed Coastal HighwayEvacuation forHajira in Disaster

Proposed Coastal Highway with

Flood Detention Reservoir



Water Resources Day Resolution:

Disperse flood to wider area, Drain to FDR – Recharge aquifer & Conserve for future Source of usable water.

(DDRCS)


ACKNOWLEDGEMENT

Thanks to

The OrganizersThe Director, SVNIT

CWC

Ravin Tailor

THANK YOUTHANK YOU

Documents

By Prof. Mahesh D. Desai (Ph.D.), Visiting Professor, AMD, SVNIT, Surat. Consulting Engineer, EFGE Consultant, Surat. TRENDS, BOUNDARIES AND WATER