WLE Rainfed SRP Bus Stop

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WLE Rainfed SRP Bus Stop

  1. 1. Rainfed Portfolioin the Volta Basin
  2. 2. Land use changes in the Volta BasinPartners:• CIAT, IWMI , CPWFQuestion (on-going work):• How are the thesechanges affectinglivelihoods and theenvironment?Way forward:• Use same approachesin other WLE regionsLandcoverchangesCroplandgainsandlossesSignificantexpansion ofcroplandsLosses:Diversificationof farming?ExtensiveGrasslandSignificantforest coverLoss of forestand cropland
  3. 3. Partners:• CIAT, IWMI , ICRAF, CPWF, WRI (CSIR,Ghana)Key outputs:• Erosion prevalence quantified• Sediment deposits in reservoirsquantified and associated costsassessed• Vulnerable spots identified fortargeted interventions withimplementing partnersPotential Impact:• Long-term restoration of soils thatimproves system productivityWay forward:• Use similar approaches in other WLEregionsErosionprevalenceSedimentlossesSoil erosion (%)1000Soil erosion and Sediment depositsComputed using InVESTto identify vulnerableareas in basin with highsediment lossesDerived with field data from AfSIS:Vågen, et al 2013
  4. 4. Water and Sediment fluxes in White Volta BasinPartners:• CIAT, IWMI , CPWF, Water ResourcesCommission (WRC), Water ResearchInstitute (WRI, CSIR) and Ministry of Foodand Agriculture (MoFA)Key outputs:• Estimate of sediment yields permitsrelevant mitigation measures andrecommendation e.g. grass strips buffersalong waterwaysWay forward:• On-going stakeholder engagementtowards Integrated Water Resources Mgt.00.10.20.30.40.50.61996 1997 1998 1999 2000 2001 2002AnnualTotalSedimentYield(T/H)Validation YearsSimulatedMeasuredStudy area is Zebilla in Upper East Region of Ghana;water yields and sediment estimates reveal impacts ofthese variables on crop productivity in the landscape0500100015002000250030003500400045001971 1976 1981 1986 1991 1996 2001AnnualVolumeofwater(Mm3)Zebila water yield Total water yield
  5. 5. The InVEST FrameworkIntegrated Valuation of Ecosystem Services and TradeoffsStakeholderprocessReal land userepresentationMutual optimalland useEntireBasinRes.sub-basinsARSRes.SubLocation012345678910Sedimentationcost(millions$)7.46.82.74.1Outcome:• Inclusive andinformeddialogueprocess onlandscaperesourcesmanagementWay forward:• Mimic similarapproach inother WLEregionsPartners:• IWMI, CIAT,Bioversity,CPWFThe InVEST framework usesrelevant critical pieces formore holistic naturalresources managementEntireBasinRes.sub-basinsARSRes.SubLocation0100200300400500600Sedimentation(tons)592546218328
  6. 6. Social processes in landscapesWet season Dry seasonOutcome:• Participatory engagement at variouslevels of society• Gendered landscapes: Entry point forequity in landscapes• Tease out seasonal componentsWay forward:• Use same approaches in other WLEregionsVarious stakeholders (at various levels in society)represent the landscape through dialogue on howresources are used over a given time and spacePartners:CIAT, IWMI,CPWF, CIRAD,WRC
  7. 7. Ecosystem Services AssessmentEcosystem Impacts020406080100%RespondentsEcosystem Impacts020406080100%RespondentsEcosystem Impacts020406080100%RespondentsEcosystem Impacts020406080100%RespondentsLawra TolonBawku West Cohorts averageBush burningPesticides application for fishingErosion/sedimentationRiver bank cultivationPartners:• CIAT, IWMI , Bioversity, CPWFKey outputs:• ESS characterized• Trends assessedWay forward:• Assess impact of habitatconversion on ESS trends• Quantify ESS trends• Use same approaches in otherWLE regionsAssessments reveal key priority issues over time andspace that deserve interventions and mitigationmeasures to sustain viable ecosystem services andprevent human health risks
  8. 8. Ecosystem Services and Trends in two VoltaBasin transectsPartners:• IWMI, CIAT, Bioversity, CPWFKey outputs:• ESS characterized• Trends assessedWay forward:• Assess impact of habitatconversion on ESS trends• Quantify ESS trends• Use same approaches in otherWLE regionsRainfallless than 900 mmyr-1Greaterthan 900 mmyr-1Radar chart revealsincreasing importanceof flood control anderosion with reducedwater qualitysoil fertility trendsRadar chart revealsincreasing importanceof sedimentation,flood control anderosion with reducedbiodiversity trends
  9. 9. On-farm testing of mitigation recommendationsPartners:• CIAT, IWMI, CPWF, IITA, USAID, WRI , ARI, KNUSTKey outputs:• Farmer participatory monitoring of rainfall events• Rain water harvesting, farmers’ use of soil andwater conservation technologies• Real time monitoring of soil moisture for seasonalchangesImpact• Increased crop yields in on-farm trials• Farmer training in soil and water managementWay forward:• Identify intensification pathways that impartsystem resilience for increasing land and waterproductivity• Investigate the impact of labor intensive practiceson system productivitySoil moisture storage, crop water productivityand gross value of production were consistentlyhigher in treatments with fertilizer micro-dose+20 kg manure and tied ridging, what about labor?Legend: Inputs effect on soil moisture
  10. 10. Achieving impact-oriented researchReliablerainfallViableEcosystemsEnablingconditionsAdequatewater resources,viable ecosystems& healthy soils- Rainfall variability impacts farming- Need for risk reduction through:o Sustainable land and water mgto Increased landscape biodiversity- Consider a holistic landscape framework- Equitable participatory engagement- Conduct tradeoff analysis- Strategic and targeted partnerships- Appropriate policies and- Proper Institutional arrangementsFrom good soils, ecosystems and water resources to entry points for food security,improved livelihoods and viable landscapes

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