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Presentation test file Presentation test file Presentation Transcript

  • Rainfed Portfolio in the Volta Basin
  • Land use changes in the Volta Basin Partners: • CIAT, IWMI , CPWF Question (on-going work): • How are the these changes affecting livelihoods and the environment? Way forward: • Use same approaches in other WLE regions LandcoverchangesCroplandgainsandlosses Significant expansion of croplands Losses: Diversification of farming? Extensive Grassland Significant forest cover Loss of forest and cropland
  • Partners: • CIAT, IWMI , ICRAF, CPWF, WRI (CSIR, Ghana) Key outputs: • Erosion prevalence quantified • Sediment deposits in reservoirs quantified and associated costs assessed • Vulnerable spots identified for targeted interventions with implementing partners Potential Impact: • Long-term restoration of soils that improves system productivity Way forward: • Use similar approaches in other WLE regions ErosionprevalenceSedimentlosses Soil erosion (%) 100 0 Soil erosion and Sediment deposits Computed using InVEST to identify vulnerable areas in basin with high sediment losses Derived with field data from AfSIS: Vågen, et al 2013
  • Water and Sediment fluxes in White Volta Basin Partners: • CIAT, IWMI , CPWF, Water Resources Commission (WRC), Water Research Institute (WRI, CSIR) and Ministry of Food and Agriculture (MoFA) Key outputs: • Estimate of sediment yields permits relevant mitigation measures and recommendation e.g. grass strips buffers along waterways Way forward: • On-going stakeholder engagement towards Integrated Water Resources Mgt. 0 0.1 0.2 0.3 0.4 0.5 0.6 1996 1997 1998 1999 2000 2001 2002 AnnualTotalSedimentYield(T/H) Validation Years Simulated Measured Study area is Zebilla in Upper East Region of Ghana; water yields and sediment estimates reveal impacts of these variables on crop productivity in the landscape 0 500 1000 1500 2000 2500 3000 3500 4000 4500 1971 1976 1981 1986 1991 1996 2001 AnnualVolumeofwater(Mm3) Zebila water yield Total water yield
  • The InVEST Framework Integrated Valuation of Ecosystem Services and Tradeoffs Stakeholder process Real land use representation Mutual optimal land use EntireBasin Res.sub-basins ARS Res.Sub Location 0 1 2 3 4 5 6 7 8 9 10 Sedimentationcost(millions$) 7.4 6.8 2.7 4.1 Outcome: • Inclusive and informed dialogue process on landscape resources management Way forward: • Mimic similar approach in other WLE regions Partners: • IWMI, CIAT, Bioversity, CPWF The InVEST framework uses relevant critical pieces for more holistic natural resources management EntireBasin Res.sub-basins ARS Res.Sub Location 0 100 200 300 400 500 600 Sedimentation(tons) 592 546 218 328
  • Social processes in landscapes Wet season Dry season Outcome: • Participatory engagement at various levels of society • Gendered landscapes: Entry point for equity in landscapes • Tease out seasonal components Way forward: • Use same approaches in other WLE regions Various stakeholders (at various levels in society) represent the landscape through dialogue on how resources are used over a given time and space Partners: CIAT, IWMI, CPWF, CIRAD, WRC
  • Ecosystem Services Assessment Ecosystem Impacts 0 20 40 60 80 100 %Respondents Ecosystem Impacts 0 20 40 60 80 100 %Respondents Ecosystem Impacts 0 20 40 60 80 100 %Respondents Ecosystem Impacts 0 20 40 60 80 100 %Respondents Lawra Tolon Bawku West Cohorts average Bush burning Pesticides application for fishing Erosion/sedimentation River bank cultivation Partners: • CIAT, IWMI , Bioversity, CPWF Key outputs: • ESS characterized • Trends assessed Way forward: • Assess impact of habitat conversion on ESS trends • Quantify ESS trends • Use same approaches in other WLE regions Assessments reveal key priority issues over time and space that deserve interventions and mitigation measures to sustain viable ecosystem services and prevent human health risks
  • Ecosystem Services and Trends in two Volta Basin transects Partners: • IWMI, CIAT, Bioversity, CPWF Key outputs: • ESS characterized • Trends assessed Way forward: • Assess impact of habitat conversion on ESS trends • Quantify ESS trends • Use same approaches in other WLE regions Rainfall less than 900 mmyr-1 Greater than 900 mmyr-1 Radar chart reveals increasing importance of flood control and erosion with reduced water quality soil fertility trends Radar chart reveals increasing importance of sedimentation, flood control and erosion with reduced biodiversity trends
  • On-farm testing of mitigation recommendations Partners: • CIAT, IWMI, CPWF, IITA, USAID, WRI , ARI, KNUST Key outputs: • Farmer participatory monitoring of rainfall events • Rain water harvesting, farmers’ use of soil and water conservation technologies • Real time monitoring of soil moisture for seasonal changes Impact • Increased crop yields in on-farm trials • Farmer training in soil and water management Way forward: • Identify intensification pathways that impart system resilience for increasing land and water productivity • Investigate the impact of labor intensive practices on system productivity Soil moisture storage, crop water productivity and gross value of production were consistently higher in treatments with fertilizer micro-dose+ 20 kg manure and tied ridging, what about labor? Legend: Inputs effect on soil moisture
  • Achieving impact-oriented research Reliable rainfall Viable Ecosystems Enabling conditions Adequate water resources, viable ecosystems & healthy soils - Rainfall variability impacts farming - Need for risk reduction through: o Sustainable land and water mgt o Increased landscape biodiversity - Consider a holistic landscape framework - Equitable participatory engagement - Conduct tradeoff analysis - Strategic and targeted partnerships - Appropriate policies and - Proper Institutional arrangements From good soils, ecosystems and water resources to entry points for food security, improved livelihoods and viable landscapes