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Integrated Modeling of RMS Impacts: Hydrological Processes, and Water Resources Modeling

Integrated Modeling of RMS Impacts: Hydrological Processes, and Water Resources Modeling. Team: IWMI (Charlotte, Solomon) Cornell (Tamo, Dan, Zack) SEI (David, Paco) BDU (Seifu, Esaya) NBI (Mekuria, Yesuf, Solomon). Objectives.

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Integrated Modeling of RMS Impacts: Hydrological Processes, and Water Resources Modeling

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  1. Integrated Modeling of RMS Impacts:Hydrological Processes, and Water Resources Modeling Team: IWMI (Charlotte, Solomon) Cornell (Tamo, Dan, Zack) SEI (David, Paco) BDU (Seifu, Esaya) NBI (Mekuria, Yesuf, Solomon)

  2. Objectives Assess integrated biophysical impacts of RMS practices and large-scale developments on water availability, sediment load (and groundwater recharge) Device mechanisms of incorporating RMS practices into basin IWRM planning Investigate up- and out-scaling options of RMS practices using sustainability criteria of satisfying downstream requirements

  3. Watersheds Climate Soil LU TI SWAT Model RMS Scenarios Sub-basins Large dams and River Junctions L-S Dev’t Scenarios WEAP Model Impact Evaluation Abay Basin Framework

  4. WEAP Modeling • Large-scale development interventions (practices): • Water control and storage infrastructures • Irrigation schemes • Hydropower plants • Environmental flows • Improved schematization for SWAT-WEAP linkages • SEI provided first feedback on the WEAP setup • Scenario definition (development + RMS) ?

  5. WEAP Schematization Dams / Reservoirs Irrigation demands River Networks

  6. SWAT-WEAP Interface SWAT sub-catchments Dams / Reservoirs Irrigation demands River Networks

  7. SWAT Modeling • SWAT initialized based on WEAP requirements and flow data availability • Landuse, soil and climate data improved • Variable sources area (VSA) concept implemented using TI • GIS Tool developed for the Soil-TI derivation • Calibration and RMS scenarios

  8. SWAT Sub-basins +

  9. Landuse Map for SWAT

  10. UBN SWAT Landuse Map

  11. Soil Map for SWAT

  12. Soil-Topography Dynamics (1)

  13. Soil-Topography Dynamics (2)

  14. Topography-Soil Map

  15. Climate Data

  16. RMS Impacts on Runoff Processes Rainfall Evaporation Transpiration Canopy Evaporation Soil Evaporation Vegetation Land Surface Water Body Throughfall Infiltration Overland flow Capillary Rise Minimize: Unproductive water use Soil Stream Interflow Maximize: TARGET/Productive water use Capillary Rise Baseflow Percolation Optimize: Watershed discharge Aquifer Transfers

  17. SWAT Scheduled Management Operations

  18. SWAT Management Operations

  19. SWAT Calibration

  20. Outlook • Finalize SWAT Calibration and SWAT-WEAP interactions for baseline scenarios • Develop scenarios of RMS practices and large-scale developements • Implement RMS Scenarios in SWAT and large-scale development scenarios in WEAP • Evaluate RMS impacts using WEAP and SWAT outputs

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