Successfully reported this slideshow.
We use your LinkedIn profile and activity data to personalize ads and to show you more relevant ads. You can change your ad preferences anytime.

Water for All? Collaborative Water Allocation in the Awash River Basin

27 views

Published on

REACH Conference on Water Security and Poverty
breakout: Managing climate resilience
Thursday 28 March | 11:00-12:30
Presenter: Dr. Feyera Hirpa, University of Oxford

Published in: Environment
  • Be the first to comment

  • Be the first to like this

Water for All? Collaborative Water Allocation in the Awash River Basin

  1. 1. Water for All? Collaborative Water Allocation in the Awash River Basin Feyera Hirpa, University of Oxford feyera.hirpa@ouce.ox.ac.uk
  2. 2. REACH Water Security and Poverty Conference 27-29 March | Keble College, Oxford THE AWASH RIVER BASIN, ETHIOPIA • A major contributor to Ethiopia’s GDP – Agriculture, hydropower, livestock. Domestic and industrial water supply, ecosystem, commercial • Highly variable rainfall – Frequent occurrence of flood and drought – Low specific water yield (1/6th of Abbay; but with 15% more population density) • Multiple decision makes and stakeholders – Shared by 5 Regional States (112 woredas), and 2 Administrative City Councils
  3. 3. REACH Water Security and Poverty Conference 27-29 March | Keble College, Oxford DEMAND AND SUPPLY MISMATCH Supply Demand Demand – Agricultural – Livestock – Domestic and municipal – Industrial – Environmental flow Supply – Rainfall – River flow – Groundwater
  4. 4. REACH Water Security and Poverty Conference 27-29 March | Keble College, Oxford FUTURE FLOW WILL LIKELY DECREASE IN ETHIOPIA • High resolution climate simulations show the future streamflow will decrease in the Awash river basin • The high flows are expected to decrease, which may reduce the groundwater recharge rates • Low flows also will likely decrease, reducing water availability during the dry seasons.
  5. 5. REACH Water Security and Poverty Conference 27-29 March | Keble College, Oxford GROUNDWATER RESOURCES IN AWASH Six major aquifers in Awash basin Kebede et al., 2019 (in prep)
  6. 6. REACH Water Security and Poverty Conference 27-29 March | Keble College, Oxford SEDMENTATION IS FILLING THE RESERVIORS Sediment accumulation in Koka reservoir is decreasing the storage capacity by 13M m3/year. This may also be a problem for other dams.
  7. 7. REACH Water Security and Poverty Conference 27-29 March | Keble College, Oxford DECISION SUPPORT TOOLS FOR WATER RESOURCES PLANNING AND ALLOCATION Developed in collaboration with the Awash Basin Authority • Performs water allocation • Considers climate, policy and socio-economic changes WEAP model for the Awash basin Demand sites, catchments
  8. 8. REACH Water Security and Poverty Conference 27-29 March | Keble College, Oxford COLLABORATIVE ALLOCATION FOR EQUITABLE WATER ACCESS Stakeholders • Woredas (120) • Irrigated farmers (23) • Basin Authority – Hydrologists – Regulators
  9. 9. REACH Water Security and Poverty Conference 27-29 March | Keble College, Oxford COLLABORATIVE ALLOCATION FOR EQUITABLE WATER ACCESS • Only surface water supply • With surface and groundwater supply With no regulation/collaboration
  10. 10. REACH Water Security and Poverty Conference 27-29 March | Keble College, Oxford COLLABORATIVE ALLOCATION FOR EQUITABLE WATER ACCESS Surface and groundwater supply • No regulation/collaboration • Capped water use for irrigation
  11. 11. REACH Water Security and Poverty Conference 27-29 March | Keble College, Oxford COLLABORATIVE ALLOCATION FOR EQUITABLE WATER ACCESS • Surface water only • No regulation 1984 was extremely dry year • Groundwater and surface water • No regulation • Groundwater and surface water • Capped irrigation water use
  12. 12. REACH Water Security and Poverty Conference 27-29 March | Keble College, Oxford SUMMARY AND ONGOING WORK Summary • Water availability in the basin is changing • Sediment load is a major problem for water storage • Collaborative water allocation improves climate resilience in arid downstream Woredas Ongoing work • Add more regulations and policy options • Future population and economic growth • Link with groundwater model MODFLOW
  13. 13. Funded by:

×