PROCEEDINGS OF THE XXXIAH CONGRESS ONGROUNDWATER:

PAST ACHIEVEMENTS AND FUTURECHALLENGES

CAPE TOWN/SOUTH AFRICA/26 NOVEMBER - 1 DECEMBER 2000

Groundwater:

Past Achievements

and Future ChallengesEdited by

Oliver Sililo et al.

The Water Programme, Environmentek, CSIR, South Africa

A.A.BALKEMA/ROTTERDAM/BROOKFIELD/2000

Groundwater: Past AchievementsandFuture Challenges, Sililo et at. feds;© 2000Balkema, Rotterdam, ISBN 905809 159 7

Table of contents

Foreword

Preface

Sponsors

UK' '-'."! ,..'s.i\J i T * v

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XIX

XXI

xxm

Keynote papers

The mineralogy of microbial ecology 3

P. C.Bennett & J.R. Rogers

Towards comprehensive groundwater resource management in South Africa 7

KBraune

Assessing pesticide pollution of groundwater: Current knowledge and remaining gaps 17

P.J.Chilton, M.E. Stuart, AR.Lawrence, D.CGooddy, R.J.Williams &AC.Johnson

Groundwater resources at die turn of the millennium: Taking stock and looking forward 27

S.S.D.Foster

Hydrogeology and wastemanagementstrategies 35

M.J.Knight

The use of monitored natural attenuation as a cost-effective techniquefor groundwater 41

restoration

D.N.Lerner, S.F.Thornton & R.M.Davison

Modeling groundwater flow and mass transport in heterogeneous media: 49

Issues and challengesC-F.Tsang

1 Determination ofaquiferparameters, resource assessment! evaluation

The applicability ofDC resistivity in some geologicalsurroundings in Sweden

J.Aaltonen

The vertical head distribution in a coastal sand-dune aquiferR.I.Acworth, R.Soriano & I.LTurner

61

67

v

Application ofremote sensing and geographical information system to hydrogeological 73

studies in theUpper West Region, Ghana

B.K.Banoeng-Yakubo & L. Skjernaa

Groundwater reservoir characterization based on pumping test curve diagnosis 81

in fractured formation

/. Bardenhagen

Determination of aquifer characteristics of semi-confined aquifers from single well tests 87

WKBoehmer

The value ofgroundwater resources associated with carbonatites 93

F. S.Botha, J. L.van Rooy &J.J.P.Viviers

The study ofkarst spring recession in Slovenia 97

M.Brencic

Preliminary assessment of the groundwater potential of the Tsumeb Aquifers 103

in northern Namibia

R.Bufler, P.Ambs, T.Himmelsbach, KTordiffe & R.Baumle

Groundwater occurrence in hard rocks in the federal district ofBrasilia - A sustainable 109

supply?J.E.G.Campos& U.Troger

Quantifying theheterogeneity offracture systems: An index for fracture flow network 115

representations at different scales

D.Cesano, ABagtzoglou & B.Olofsson

Adequate depth ofboreholes in hard rocks: A case study in Ghana 121

P.KDarko&J.Krdsny

The use of borehole tomography to image the saline interface - A case study from New South 127

Wales, Australia

G. R. Dasey & R.I.Acworth

Thermal analyses for groundwater flow assessment in a sedimentary basin ofJapan 131

J. R.Dim, Y.Sakura, AMiyakoshi & K. Fukami

Application of the electrokinetic sounding technique for geohydrological investigations 135

in a fractured rock aquifer systemF.D.Fourie, J.F.Botha,R.Grobbelaar & G.J.van Tonder

Specific surface area of glacial drift material determined by laboratory experiments 141

A Fransson

Recharge assessment: Comparing tracers, micro-meteorology and soil water models 147

J.CGehrels

VLF method applied to hydrogeological prospecting in the gneissic-migmatitic hard rock 153

aquifer of Evora, South PortugalAGomes, AChambel & J.Duque

Hydraulic seepage within an astatic karst lake, North-Central Florida 159

/.D. Hirsch &AF. Randazzo

CSAMT mapping of a deep hydrogeological structure in Mauritius Island 165

J.LJoin, B.Robineau, M.Courteaud & M.Ritz

VI

Groundwater resource developments in the Northern Territory, Australia 169

P.Jolly, D.George, SJickell, U.Zaar & D.Chin

Benefits ofincorporating remote sensing techniques as amethodological approach 175

for improved borehole siting infracturedrock aquifersN.Kellgren & P.Sander

The valuation ofmajor aquifers of the Upper Silesia region 181

A Kowalczyk, ARoikowski & A. J. Witkowski

Geologic factors influencing distribution of hardrock transmissivity 187

J.Krdsny

A geophysical perspective in siting high yielding boreholes in the lower Karoo aquifer 193

in western Botswana

H.Kumar, D. Sarma & LCarlsson

Groundwater evapotranspiration - Underestimated component of the groundwater balance 199

in a semi-arid environment - Serowe case, Botswana

M.W.Lubczynski

Location ofa well field in a coastal alluvial aquifer of southern Sardinia, Italy, subjected 205

to saline water intrusion

G.Luise, CSechi & P.Ciabatti

Hydrogeology of the coastal region of Jakarta, Indonesia 209

H.Maathuis, W.Mak & S.Adi

The effects of alien vegetation clearing on a coastal aquifer, Bushmans River Mouth, 215

Eastern CapeL.GAMaclear&J.C.Kotze

Hydrodynamic investigations in a recentvolcanic aquifer, Reunion Island, using single well 221

tracer test

J. S. Martial, J.LJoin & J.Coudray

Conceptual model ofgroundwater flow in stratified mountainous ten'ain, Utah, USA 225

AL.Mayo & T.H.Morris

Estimating the reliable output of wells 231

B.D.R.Misstear & SBeeson

The use ofthermal imagery in ground water studies 235

K. L Morton &AJ. Franszen

Rational utilization ofgroundwater for water supply engineering 241

P.Nemethy & D.Vlckovd-Michalikovd

Groundwater exploration in complex fractured rock 247

I.Neumann & K.Sami

Recharge-discharge relations of the Vipava karst aquifer, Slovenia 253

M. Petric

Water table variation due to time-varying recharge and withdrawal 259

S.N.Rai&AManglik

VII

Hydrogeology of Nowergup Lake, Perth, Western Australia 263

AQ.Rathur <& M.Banda

Groundwaterin hard rocks, Oppland county, Norway 269

E.Rohr-Torp

The MRS technique for groundwater resources evaluation - Test results from selected sites 273

in Southern Africa

J.Roy & M.W.Lubczynski

Providing ground water supply and assessing borehole yield in a disaster relief context 281

F.Ruden & KSami

Change of subsurface temperature caused by climatic change in Japan 287

Y.Sakura, Y.Uchida, M.Taniguchi, I.Kayane & M.P.Anderson

Scientific support for sustainable groundwater management: A modelling study in Botswana 291

using environmental tracers

B.Schaffner, Y.Y.Chen, T.Kelepile, W.Kinzelbach, LCarlsson &I.Mannathoko

Theory and procedure of thermal fluid logging in discontinuous rock mass 297

M.Schreck, KNakagawa & KSuenaga

Investigation ofwater resources in arid climate using radar 303

D.Schulze-Makuch &P.Haddad

The role of bypass- and matrix flow in the unsaturated zone for groundwaterprotection 307

K.-P. Seller, S.v.Loewenstern & S.Schneider

Groundwater recharge deduced from He isotopes in the Botswana Kalahari 313

E.T.Selaolo, D.R.Hilton & H.E.Beekman

Predicting fractured rock hydrogeological parameters from field and laboratory data 319

J.M.Sharp, Jr, T.Halihan, M.M.Uliana, G.P.Tsoflias, M.T.Landrum &R.Marrett

Estimation of groundwater recharge to the Kanye dolomite aquifer in Botswana 325

M.Simonic, AAdams, LCarlsson & CMarobela

Natural groundwaterrecharge assessment: Role of preferential flow in semi-arid fractured 331

aquifersB.S.Sukhija, D.V.Reddy, P.Nagabhushanam & S.Hussain

Geology and resistivity characteristics of the Stampriet Artesian Basin 337

G.Symons, R.McGMiller, Y.Hata, Y.Yamasaki, K. Sugawara & U.Noell

Groundwaterrecharge estimation in the Pingtung Plain, Taiwan 343

C.-S.Ting

Analysing the geometry ofSouth African fractured rock aquifers 349

Ivan der Voort & G.J.van Tonder

A tracer test in a fractured aquifer that gave a groundwater flow rate of kilometers per day 355

AKVan Wyk, ECMurray & G.J.van Tonder

Deep flowing groundwater in the Table Mountain Group quartzite 359

J. M. C.Weaver & A. S. Talma

VIII

2 Groundwater modelling

Comparison ofgenetic algorithms with othermethods for the ambient groundwater 367

monitoring networkplanningL-CChang, H.-C.Su & C-LTien

Construction of groundwater model for Pusan area, South Korea 373

B.-W.Cho,B.-J.Lee,J.-H.Sung,B.-D.Lee & C-O.Choo

Hydraulic fracturing of water wells in Botswana 379

V.Devalpally, M. SMdamarty & L. Carlsson

Complementarity of electromagnetic prospecting and groundwatermodelling to study shield 385volcano hydrogeology: Piton de la Fournaise volcano case study, Reunion Island

J.L. Folio, J.LJoin, B.Robineau, J. Coudray &. M. Ritz

Groundwater conditions in me Upper Shire Valley, Malawi: A modelling synthesis 389

SLHorrocks, W.G.Burgess & P.Mkandawire

The interaction between coastal lakes and the surrounding aquifer 395

B.E.Kelbe & T.Germishuyse

Assessing uncertainty in sustainable yield 401

N.P.Merrick

Three-dimensional numerical models of groundwater flow and solute transport in fractured 407

granites: Impact oftunnel construction in the groundwater system at the Asp6 island, SwedenJ. Molinero, J.Samper & R.Juanes

Robust groundwater management through second-order cone programming, SOCP 413

J.M.Ndambuki, T.Terlaky, C.B.M.Stroet & EJ.M.Veling

Hydrogeological investigations in the Otavi Mountain Land 419

G. Schmidt & D. Ploethner

On variable-density groundwater flow in heterogeneous porous media 425

C. T. Simmons & J. M.Sharp, Jr.

Groundwater investigation and modelling ofeffluent irrigation: A case study 431

J.J. GVermaak, D. G.Walker &J.C. F.Barnes

Optimised calibration ofregional groundwater model through inverse modeling 437

Y. S. Yang, AACronin & R. M. Kalin

3 Chemical and isotopic characterization ofgroundwater

Groundwater salinization in parts of southern Ghana 445

T.EK.Armah

A study on the mixing phenomena between surface water and groundwater induced pumping 451

using environmental isotope tracers

D. Bae, C. Kim, Y.Koh & K. Kim

Groundwater sampling during the mud-rotary drillingprocess 455

ABittner & G.Christelis

IX

Application of environmental isotope techniques to hydrological and pollution problems 459

in the urban environment

MJ.Butler, BTh.Verhagen & M.Levin

Geochemical modelling and laboratory experiments to test the feasibility of artificial recharge 465

LCCave

Geochemical processes affecting the composition of mineral waters in the South Portuguese 471

Zone, PortugalA Chambel & CAlmeida

Dissolved radon concentrations in fractured rock aquifers 475

P.G.Cook & J. C. Dighton

High nutrient and chloride loads to surface waters in polder areas due to groundwater seepage 481

P.G.B.deLouw, G.AP.H.van den Eertwegh & J.Griffioen

Isotope based assessment ofgroundwater renewal: An international study of the unsaturated 487

zone

WM.Edmunds & B.Th.Verhagen

Evolution of high-pH Na-HC03 groundwaters in anorthosites: Silicate weathering 493

or cation exchange?B. Frengstad & D. Banks

Regional scale solute transport modelling ofa Permo-Triassic sandstone aquifer 499

B.V.Furlong, J.H.Tellam, R.Mackay, J.AIngram & AW.Herbert

Arsenic in groundwaters ofthe southeast of Tucuman Province, Argentina 503

M.CGarcia, D.S.Fernandez, M.del ValleHidalgo & M.ABlesa

Hydrochemical characteristics ofthe Faria basin, northeastern West Bank 509

M.Ghanem & B. Merkel

Modelling mixing of waters in a layered basaltic aquifer in a tropical climate at Riviere 515

de l'Est, Reunion Island

J.LHoareau, E.Nicolini & S.Violette

Sustainable management ofgroundwaters in dryland salinity affected Spring Creek 521

catchment, New South Wales, Australia

J.Jankowski & SShekarforoush

Biofouling in boreholes of the Klein Karoo Rural Water Supply Scheme, Oudtshoom, South 527

Africa, and the effect on well scheme managementJ. LJolly

Isotopic characterization of groundwater and surface water in the Keta Basin, Ghana 533

N. O.Jfirgensen & B. K. Banoeng-Yakubo

An aquifer model based on chemistry, istopes and lineament mapping: Little Karoo, 539

South Africa

J.CKotze, B.Th.Verhagen & MJ.Butler

Assessment of fluoride concentration in groundwater, Saldungaray, Argentina 545

E. E. Kruse & J.EAinchil

x

Hydrogeology, groundwater resources and salinification processes in the lower Okavango 549Delta, northwestern Botswana

F.Linn, M.Masie &AJ.Rana

Chemical character ofgroundwater in a basalt aquifer, North Queensland, Australia 555K.L.Locsey&M.E.Cox

Boron isotope geochemistry as a tool to delineate natural groundwater processes 561J. D. Mather & N. C.Porteous

Groundwater quality and sustainability in an alluvial aquifer, Australia 567

W.McLean, J.Jankowski & N. Lavitt

Environmental isotopes as indicators forgroundwater recharge conditions below glaciated 575

areas in crystalline rocks of the central Swiss AlpsU.SOfterdinger, W.Balderer, SLoew & T.Vitvar

Predicting ion exchange parameters for Triassic Sandstone aquifers 581

K.E.Parker,J.H.Tellam&M.I.Cliff

Geochemical evolution ofgroundwater in metamorphic rocks of Tras-Os-Montes, Portugal 587

M.Rosdrio Pereira & C.Almeida

Rapid water quality changes in a thick clay sequence 593

B.ARobinson, JH.Tellam, J.B.Joseph &AW.Herbert

Example of 0- and H-isotope use to identify surface waterpollution in groundwater 599

I.CSaayman, S.Adams & C.Harris

Hydrogeology of the Ballimore region, central New South Wales, Australia 605

S.Schofield & J.Jankowski

Salinisation of a coastal aquifer in Mauritania: Salt wedge or bedrock alteration? 611

B. M.Semega, M. Lacroix, H. Q.Wang &J.P. Dupont

Arsenic and acidity in a groundwater system affected by acid sulfate soils, 615

Stuarts Point, Australia

J. V. S. Smith, J.Jankowski & J. Sammut

Geohydrology and isotope hydrology ofthe Lomagundi dolomite, Zimbabwe 623

SSunguro, K.Froehlich, BJh.Verhagen& WWagner

Karst aquifer characterization using physico-chemical spring data, Gran Sasso, Central Italy 629

M.Tallini, M.Petitta,D.Ranalli & SJersigni

CFC tracing ofgroundwater in fractured rock aided with'4C and 3H to identify water mixing 635

A S. Talma, J. M. C. Weaver, L N. Plummer & E.Busenberg

Characteristics of groundwater quality in the United Arab Emirates 641

CTang, SShindo, YSakura&LMachida

Calibration of a groundwater flow model for water management in Hamburg, Germany, using 647

groundwater age measurements and hydrochemical data

R.Taugs ScLMoosmann

Depth variations in aquifer hydrochemistry using alow-cost, multilevel piezometer 651

R.G.Taylor, M.H.Barrett, O.P.Baines, SATrowsdale, D.N.Lerner & SF.Thornton

XI

Groundwater quality trends related to aquitard salt storage at selected sites in the Lower 655

Murrumbidgee alluvium, Australia

W.Timms, R.LAcworth, J.Jankowski & SLawson

Groundwater flow in fractured rocks of central Namaqualand, South Africa 661

R.ATitus, S.Adams, KCPietersen & G.Tredoux

In-situ measurement ofphysico-chemical parameters down a borehole as a tool for resource 667

evaluation

G. Tredoux, L. C.Cave &J.F.P. Engelbrecht

Environmental isotopes assist in ground water sustainability assessment of the Taaibosch 673

fault zone, Northern Province, South Africa

BJh.Verhagen, MJ.Butler, M.Levin & E.van Wyk

3D groundwater modelling ofisotope data at Asp6, Sweden 679

B.Wallin & K.Innings

Pilliga Sandstone hydrogeochemistry, Great Artesian Basin, Australia 683

CAWolfgang& LWhite

4 Groundwaterpollution vulnerability and remediation

Sources of faecal contamination of shallow groundwaters in Kampala 691

M.H.Barrett, KJohal, G.Howard, SPedley & M.Nalubega

Using Kd-Test data in the estimation of contaminant attenuation and risk assessment 697

P.H.Beck & J.Jankowski

Simulation of mass transfer kinetics for chemically enhanced removal of residual 703

trichloroethene

T.B.Boving, ZZhang, W.Ji &M.L.Brusseau

Fieldrelationships and models of arsenic in aquifers of southern Bangladesh 707

W.G. Burgess, M.Barren, M.O.Cuthbert, S.E Mather, J.Perrin, M.K.Hasan, KM.Ahmed,

P.Ravenscroft & M.Rahman

The closure of existing waste piles in terms ofthe south African Department ofWater Affairs 713

and Forestry Waste Management Series

/. S. Cameron-Clarke &J.A Palmer

Effect ofrapidly urbanizing environment on the Thiaroye, Senegal, unconfined sandy aquifer 719

ICisse, S.Faye, C.B.Gaye, AFaye & S.Wohnlich

dilution vulnerability assessment in karstic aquifers: A case study of the Matese Mountains, 725

Southern ItalyACorniello &D.Ducci

Natural redox processes and bioremediation in the Gardermoen glaciofluvial aquifer, Norway 731

ADagestad

Proving natural attenuation widi modeling at a site contaminated by ammonium 737

and phenolicsR.M.Davison &D.N.Lerner

XII

Delineation of borehole protection zones in fractured rock aquifers 741

S.S.de Lange & G.J.van Tonder

Degradation behaviour of halogenated aliphatics influenced by concurrent chromate 747reduction in subsurface Fe°-reactor systemsM.Fruth & M.Schneider

Bacterial contamination in Norwegian groundwater wells in bedrock 751S.Gaut, G.Storr0 & B.Brattli

Soil pore manipulations to increase bioaccessible pore volume 755

J.H.Gorres, MAStoltJ.AAmador, CSchulthess & P.W.Johnson

Using urban aquifers: Assessing water quality issues 759

R.Greswell, AThomas, K.A. Shepherd, R.I.Sauer,R.G.R.Mitchener, J.M.Harris, RMackay, J.H.Tellam

&M.O.Rivett

Colloid release due to degradation of organic contaminants at a former gas plant, Gaisburg, 767

Germany

T.Hofmann & T.Schafer

Transport of suspended solids from karst to alluvial aquifer: Column/field experiment 773

N. Massei, M.Lacroix, H. Q. Wang &J.P.Dupont

Characterization and remediation of alow permeability formation contaminated 779

with halogenated solvents

B.AMemon, L D.George & M. MAzmeh

Hydrogeological characterization of fractured rock for Sweden's nuclear waste storage 785

M.Morosini & I.Rhen

Practical and responsible approaches to soil and groundwater contamination management 791

at a South African metal plating factoryR.D.Morris, H.G.AllertonIII & J.P.W.van der Westhuysen

Risk-based decision analysis for the selection of remediation strategy at a landfill 797

J.Norrman

Groundwater pollution, landuse and environmental impacts on Lusaka aquifer 803

LA Nyambe & C. Maseka

Modelling and field trials for the development of a rehabilitation strategy for an existing 809

hazardous waste site

J.A Palmer, AJ.Oliver &I.S Cameron-Clarke

Enteric virus detection in groundwater using a glass wool trap 813

K. L Powell, M. H. Barrett, S. Pedley, J.H. Tellam, K.A. Stagg, R.B. Greswell & M.0. Rivett

Natural resistance to agricultural contamination of a limestone aquifer 817

5.C.Roberts &J.M. McArthur

Passive in situ treatment of Cr(VI)-contaminated groundwater by zero-valent iron: 823

Results of a field studyM. Schneider

XIII

Risk assessment, modeling groundwater contamination, capping and optimizing hazardous 827

waste landfills from metal smelters

/. E. Sorlie & K.Rudolph-Lund

In situ measurement ofoleoporic fracture aperture by DNAPL surrogate injection 833

A Steele & D. N.Lerner

Experiences with an in situ groundwaterremediation of VOCs in Hamburg, Germany 839

J.Taugs

A volume-based approach to predicting the fate ofDNAPLs in fractured aquifers 843

GP.Wealthall & D.N.Lemer

Changes of quantity and quality of groundwater in the Triassic carbonate formation 847

in Upper Silesia, Poland

AJ.Witkowski & A. Kowalczyk

Effects of soil environment changes on the behavior of VOC's in unsaturated zone 853

M.Yoshimura & CTang

5 Integrated water resource management

Groundwater status ofthe City of Stockholm 859

MAastrup, JAnderberg & B.Thunholm

A review ofimpacts offorestry on groundwater and implications for forest management 863

ARAllen & D.V.Chapman

Current and future challenges for managing groundwater quality in Perth, Western Australia 869

SJAppleyard

Groundwater resources management in Africa with the aid of databases and GIS 873

I. F.Blecher

Groundwater management below sea-level coastal areas in the Po Delta, NE Italy 877

M.Bondesan, AGargini ScAGiovannini

US regulation of animal feeding operations: Need for a watershed approach 883

T.J.Centner, M.E.Wetzstein &J.W.Worley

Experiences from implementation of artificial recharge projects in India 889

D.KChadha

Assessment of saline groundwaterresources in the goldfields ofWestern Australia 897

D.P.Commander & S.LJohnson

Classification of groundwater resources under the South African National Water Act 901

J.Conrad & Ivan der Voort

The potential ofriverbank filtration for drinking water supplies when aquifers are brackish 907

P.J.Dillon, W.Rhebergen, M.Miller &H.Fallowfield

Small scale aquifer storage and recovery - A case study from England and implications 913

for wider developmentJ.EDodds

XIV

Development scenarios for sustainable urban water systems 917

M.Eiswirth, H. Hotzl & L. S.Burn

Hydrogeological decision analysis for selection ofalternativeroad stretches and designs 923

H.S.Eklund&L.Rosen

Investigation oftrace elements for the assessment ofsustainable water supply 929

B.Fritz, CSommer-vonJarmersted.APekdeger, SMschnack & MJekel

Managing groundwater resources with increasing sulphate concentration: A case study 935

from GermanyT.Grischek, V.Schmalz, E.Worch, J.Herlitzius <& W.Nestler

Salinity and floodplain tree health in the lower River Murray, Australia 941

K.L.Holland,AJ.Telfer,G.R.Walker,S.D.Tyerman&LJ.Mensforth

Advancing technologies inthe hydrogeological design ofurban subdivisions 947

K.W.F.Howard, B.Beatty, J.Thompson & SMotkaluk

A framework for assessing water resources and abstraction sustainability 953

S.Kirk&R.Soley

Informationon interactions between groundwaterand vegetation relevantto South African 959

conditions: A review

D. CLe Maitre, D. F.Scott & C. Colvin

Failure of rural schemes in South Africa to provide potable water 963

G.Mackintosh & CColvin

Aquifer Storage and Recovery (ASR) using water treated to irrigation standards 969

R.R.Martin, N.ZGerges & P.J.Dillon

Major issues in sustainable water supply in Botswana 975

O.A.Masedi, 0. Katai, I. Muzila & L.Carlsson

Groundwaterresources management in theSADC region; A field of future regional 981

co-operationP. Molapo, S. K.Pandey & S.Puyod

Testing borehole injection for artificially recharging secondary aquifers in Southern Africa 987

E.C.Murray & G.Tredoux

Management of groundwater resources in Lusaka, Zambia, and expectations forthe future 993

D.CW.Nkhuwa

Determination ofthe groundwater component of the reserveusing theintermediate reserve 999

determination method

R. Parsons & HMacKay

Challenges in evaluating solute transport from a long-term ASR trial in a heterogeneous 1005

carbonate aquiferP.Pavelic, P.J.Dillon & N.ZGerges

Sustainable management of groundwater in Neapolitan volcanic areas, Italy 1011

VPiscopo, F.Formica & VAllocca

xv

Support for integrated groundwater/ surface water monitoring and assessment for sustainable 1017

catchment management

D.W.Peach, BAdarns, J.P.Bloomfield & H.Wheater

Semiarid regions being the millstone ofnew developed countries: Case study Rioverde basin, 1023

Mexico

B. Planer-Friedrich & B.J. Merkel

Towards a groundwater management plan for the Taaibos Spruit and Leeu Spruit catchments, 1027

South Africa: A situation analysisJ.A Pretorius & B. H. Usher

Sustainable water resources management in an agricultural environment 1033

M.Razack, M.Larminach & O.Gaillard

Sustainable groundwater supplies for rural communities: A common approach 1039

to project auditN.S.Robins, R.CCalow, KPietersen & R.Titus

Groundwater resources in Berlin, Germany: Will there be enough fresh water in the future? 1043

C.Sommer-von Jarmersted, B. Fritz &APekdeger

Sustaining ecosystems and cultures dependent on springs ofthe Grand Canyon, USA 1047

AE. Springer & E.S.Wilson

Managing mine de-watering for bulk groundwater supply in the Kalahari region, 1053

South Africa

G.SJu Toit van Dyk,L.D. Ferris & J.M.Nel

The role of groundwater quality monitoring in the strategy of groundwater protection 1057

J.Vrba

The impacts of dual-porosity aquifers on Aquifer Storage Recovery (ASR) schemes 1065

AT.Williams, LGaus &I.N.Gale

Comprehensive determination of the resource directed measures for groundwater 1071

in South Africa

Y.Xu, EBraune, CColvin,D.LeMaitre, KPietersen & T.Hatton

Groundwater resources protection and aquifer recovery in China 1077

ZHan

Geostatistical approach to groundwater quality assessment in a rural zone of the Tejo River 1083

basin border, PortugalJ.Duque &A.Chambel

6 Groundwater and mining

Hydrogeochemical tools to define sources of ground-water inflow to surface and underground 1091

mines

DA Bird & J.J. Mahoney

Hydrogeological and geochemical investigations of an acidic mining lake as a basis 1099

for a biotechnological remediation

E. Bozau, K. Knoller & G. Strauch

XVI

Investigation on deep water resources by tunnels within the "Piton des Neiges" volcano, 1103

Reunion Island

L. Bret, J.-LJoin & J. Coudray

Dewatering and the tourist potential of hydrogeological resources of the Gavorrano mine, 1107

Tuscany, ItalyCAGarzonio

Salinity issues relating to decommissioned open pits in Western Australia 1113

J.W.Hall

The impact of mining on groundwater quality in the Tarkwa area, Ghana 1119

B.KKortatsi

Witwatersrand deep Au mines: Windows into deep subsurface microbial communities 1125

T.C.Onstott,D.P. Moser&R.J.Wilson

Assessment and rehabilitation ofreclaimed gold tailings dams areas inSouth Africa 1129

T.Rosner,JJ.G.Vermaak,Avan Schalkwyk & CJ.Viljoen

Management of coal mining impacts on water resources in South Africa 1135

DA Salmon

1141

Author index

XVII