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Public Disclosure Authorized Public Disclosure Authorized Public Disclosure Authorized Public Disclosure Authorized I * * ¼~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~-~ -.- ~~~~~~~~~~~~~~~4 - I 0. laIt,\ KINGDOMOF LESOTHO LESOTHO HIGHLANDSDEVELOPMENT AUTHORITY LESOTHO HIGHLANDSWATER PROJECT PHASE 1B ENVIRONMENTALIMPACT ASSESSMENT May 1997 I Lesotho Highlands Water Project Phase IB EnviromnentalImpact Assessmrent This EnvironmentalImpact Assessmentis dedicatedto the memoryof Dr. Malefane Maema, who died tragicallyin a motor accidentin November1996. Dr. Maema was a former Manager of the EnvironmentDivision of LHDA and a strong advocate of the environmentalimpact assessment process, particularly as a vehicle for the protection of the culture and socio-economyof the people of the Highlands.Following his career with the LHDA he pursued a teaching positionat the Universityof Natal where he continuedhis interest in environmentalmanagement and rural development.During the preparation of the Phase IB EIA Dr. Maema was a valuable member of the UNESCO/UNDPreview team and a contributor of provocativethought and detailed commentto both the EIA process and its product as reflectedin the first two draftsof the EIA document. Dr Maema's contributionto the environmentalmanagement of Lesotho's resources will be greatly missed bv his professionalcolleagues in LHDA and elsewhere.His loss will be felt by all in Lesotho who rely on the resources of the country for their livelihood,and by those who continue the pursuit of sustainable resourcemanagement. a A Lesotho Highlands Water Project Phase 1B EnvironmentalInpact Assessment Table of Contents SUMMARY ............ viii 1.I NTRODUCTION...................... I 1.1 STATEMENTOF PURPOSE.1 1.2 BACKGROUND.1 1.3 LESOTHOHIGHLANDS WATER PROJECT CONCEPT .2 1.4 INSTITUTIONALAND LEGAL FRAMEWORK .2 1.4.1 TreatyAgreement.? 1. 4.2 EL4 Requirement and Other Related Regulations .7 1.5 LESSONSLEARNED FROM PHASE A .8 1.5f.1Management.8 1.5.2 Local People.9 1.5.3 Socio-economic Concerns.10 1.5.44Compensation.1l 1.5.5 Environment.11 1.5.6 Rural Development.12 1.6 SCOPE OF THE EIA.12 2. METHODS12 .4 IPCToSSSMpENTMHOS-MHLATioMNT . ............................................-........... ......... .. ......... .... ......... .............. ... .. .. ......... .................... ...... 1713 . 2.1I GENERALDESCRIPTION .. 13 2.2 SCOPING AND SELECTIONOF IMPORTANTENVIRONMENTAL COMPONENTS.13 2.3 DATA COLLECTIONAND ANALYSIS.15 2.5 IMPACTASSESSMENT METHODS - RIVERS DOWNSTREAMOF DAM SITE.1 7 2.6 DEFINED STUDY AREAS (SPATIAL BOUNDS FOR EIA).18 2.7 DETERMINATIONOF IMPACT SIGNIFICANCE.19 2.7Z.1IDescription.19 2. 7.2 Defined Time Spans for Predi cted Impacts.19 2. 7.3 Scaie of Impacts9...............: 1 2. 7.4 Guidelines for Levels of Severity of Impacts.19 2. 7.5 Certaintv of Impact Occurrence.19 2. 7.6 Sign{ifcance of Impacts.20 2.8 POSITIVE IMPACTS.20 3. PROJECTDESCRIPTION ..... 1 3.1 PRO I SEECT L TTING. ............................................. 21 3.2PRO1 ECT ALTERNAvES s ...... 21 3.3 PROIECTDESCRIPTION ................ ; 3 3.3.1 General.23 3.3.2 Mohale Dam andAssociated infrastructure .23 3.3.3 Mohale Tunnel.25 3.3.4SMatsoku Diversion.25 3. 3.5 Supporting Infrastructure.25 3.3.6 Development Stages.26 3.3. 7 Development Program.26 I _ Lesotho Highlands Water Project Phase lB Environmental Impact Assessment 4. DESCRIPTION OF THE EXISTING ENVIRONMENT ............................................33 4.1PROJECTAREA............................................ 33 4.2 PHYSICALENIRONMENT ............................................ 33 4.2. 1 Climate .................................... 33 4.2.2 Geology and Physiography ................................... 35 4:2.3 River Aorpholog ......................... 40 4.2.4 Hydrology ................................... 41 4.2.5 Soils .................. 46 4.3 TERRESTRIALENVIRONMENT ................................... 52 4.3.1 Land Resources and Rangelands ................................... 52 4. 3.2 Livestock .... ;53 4.3.3 Field Crops and Horticulture ................................... 55 4.3.4 Forests and Village Orchards ................................... 58 4.3.5 Fauna .................. 58 4. 3.6 Flora .................. 61 4.3.7 Rare and Endangered Terrestrial Species ................................... 65 4.4 FRESHWATERENVIRONMENT ................................... 66 4.4.1 Habitats ................................... 66 4.4.2 Fauna .................. 68 4.4.3 Rare and EndangeredAquatic Species ................................... 71 4.4.4 Water Quality ................................... 71 4.4.5 Fisheries ................................... 72 4.5 Socio-EcoNoMicEN VIRONMENT................................................................ 74 4.5.1 Administration ...... :74 4.5.2 Popunlationand Settlements...................................................... 76 4.5.3 Land Tenure. Culture, Society and CommunityResources ...................................................... 78 4.5.4 Livelihood and Subsistence ...................................................... 78 4.5.5 Local Use ofResources...................................................... 78 4.5.6 TransportationandAccess ...................................................... 81 4.5.7 Health and Nutrition...................................................... 81 4.5.8 Education...................................................... 85 4.5.9 WaterSupplies and Sanitation...................................................... 85 4..5.10Energy and Telecommunications....................................................... 85 4.5.11 Gender Issues...................................................... 85 4.5.12 A esthetics...................................................... 86 4.5.13 Tourism...................................................... 86 4.5.14 Cultural Heritage....................................................... 86 4.5.15 NaturalHazards ...................................................... 86 4.6 RIVERSYSTEMS DOWNSTREAM OF THE PROJECT ........................................................ 87 4.6.1 OrangeRiver (RSA) .8........................................................ 7 4.6.2 Ash River (RSA)........................................................ 88 5. PEOPLE'SPARTICIPATION AND SCOPINGOF PUBLIC OPINION.................................................... 90 5.1 BACKGROUND........................................................... 90 5.2 PARTICIPATIONCONTEXT .......................................................... 90 5.3 PEOPLE'SPERCEPTIONS OF PROJECTIMPACTS AND VIEWS ON REMEDIAL MEASURES . ......................................91 5.4 SUMMARYOF PEOPLE'S PERCEPTIONS .................................................................. 94 5.5 INSTMTUTIONALISATIONOFPEOPLE'S PARTICIPATION ....................... ........................................... 95 6. ENVIRONMENTALASSESSMENT .................................................................. 96 6.1IMPORTANT ENVIRONMENTAL COMPONENTS .................................................................. 96 6.2 FUTURESCENARIO WITHOUT PROJECT .................................................................. 96 - ii - Lesotho Fighlands Water Project Phase IB EnvironmentalImpact Assessment 6.3 BENEFITS.................... ................................................................................................ 120 6.3.1 Lccal Benefits ........ ,,,,120 6.3.2 Regional Benefitst122 6.3.3 Benefits.B.ational 123 6.3.4 International Benefits.124 6.4 IM\PACTASSESSMENT.124 6.4{.] Ptysical Environment. ,124/ 6.4.2 AquaticEnvironment .......... ;128 6.4.3 T errestrialEnvironment............................ 134 6.4.4 S ocio BEconomic Env ronm ent1 ........ 1254......................................... 6.4. 5 Other IECss.162 6.4.6 Impacts of Alternative Arrangements - Mfohale Dam.,162 6.4. 7 Seism Acic tivity.6 ....................................... 123, 6.4}.8Impacts of Alternatives 6'vlohale Tunnel).163 6.4.9 Impacts ofAlternatives (AratsontuD-eiveon) D163 6.5 DOWNSTREAM IMPACTS .164 6.5.1 Senqunyane and Senqu River Systems.1 /64 6.5.2 MIatsoku River .177 6.S.3 Orange River ('RS4).180 6.5.4 Ash River (RSA) ........................... 184 6.6 CU&rULATIVEEFFECTS ASSESSMENT .188 6. 6.1 Introduction.188 6.6.2 Phase IB and Cumulative Effects Assessment .189 6.7 ImPACT ASSESSMENTSUMIMARIES .................................................................. 196 6.8 MITIGATIONPOSSIBILrFES.213 6.9 RESIDUALIMPACTS.3 ........................................................... 213 7. ENVIRONMENTAL MANAGEMENT......................................................218 7. 1 PURPOSEAND IINTENNT ........... .................. ..... ...... ................................................................. ............................... 218 7.2 DESCRIPTION....................................................................................................... 218 7.3 MONITORING..... 218 . .. .. 7.4 PEOPLE'S PARTICIPATIONIN ENVIRONMENTALMANAGEMENT. 219 7.5 EMERGENCY PREPAREDNESSPLAN. 219 7.6 TRAINING REQUIREMENTSFOR ENVIRONMENTALMANAGEMENT .220 7.7 CONSTRUCTIONMITIGATION.220 7.8 LHDA OPERATIONAL PHASE - ENVIRONMENTALPROGRAMMING ...................... 220 7.9 LHDA ENvIRONMENTAL SECTOR PROGRAMMING.221 7.9.1 General.221 ............................... 22 7.9.2' Overall Program Management.2213 7.9.3 Resettlement Program .. , 1................. 7.9.4 Compensation Programm22 7.9.5 Devel opmentPrograbm ................................. .............. ........... 22.6.....224 7.9.6 Public