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
Call Girls Ramtek Call Me 7737669865 Budget Friendly No Advance Booking
Water for All? Collaborative Water Allocation in the Awash River Basin
1. Water for All? Collaborative Water
Allocation in the Awash River Basin
Feyera Hirpa, University of Oxford
feyera.hirpa@ouce.ox.ac.uk
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. 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. 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. 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. 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. 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. 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. 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. 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. 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. 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