Your search found 3 records
1 Ayenew, T. 2007. Some improper water resources utilization practices and environmental problems in the Ethiopian Rift. African Water Journal, 1(1):80-105.
Lakes ; Rivers ; Water use ; Environmental effects ; Irrigation effects ; Soil salinity ; Geology ; Geomorphology ; Hydrology ; Water balance ; Groundwater ; Recharge / Ethiopia / Ethiopian Rift / Lake Abiyata / Lake Ziway / Lake Langano / Lake Beseka
(Location: IWMI HQ Call no: P 7984 Record No: H040563)
http://www.uneca.org/awich/awj_vol1_no1/8%20some%20improper%20water%20resources%20utilization%20practises.pdf
https://vlibrary.iwmi.org/pdf/H040563.pdf
https://vlibrary.iwmi.org/pdf/H040563.pdf
(0.35 MB) (357.74 KB)
2 Kebede, S.; Charles, K.; Godfrey, S.; MacDonald, A.; Taylor, R. G. 2021. Regional-scale interactions between groundwater and surface water under changing aridity: evidence from the River Awash Basin, Ethiopia. Hydrological Sciences Journal, 15p. (Online first) [doi: https://doi.org/10.1080/02626667.2021.1874613]
Groundwater flow ; Surface water ; Drylands ; River basins ; Water security ; Lakes ; Reservoirs ; Water resources ; Aquifers ; Stream flow ; Discharges ; Salinity ; Irrigation water ; Water budget ; Wetlands ; Hydrology ; Electrical conductivity ; Isotopes / Ethiopia / Awash River Basin / Lake Beseka
(Location: IWMI HQ Call no: e-copy only Record No: H050234)
https://www.tandfonline.com/doi/pdf/10.1080/02626667.2021.1874613
https://vlibrary.iwmi.org/pdf/H050234.pdf
https://vlibrary.iwmi.org/pdf/H050234.pdf
(8.05 MB) (8.05 MB)
Relationships between surface waters and groundwaters at basin scale are rarely investigated but have important implications for water resource development and management. Here, we integrate evidence from geochemical tracers and piezometry to advance the understanding of regional-scale, groundwater–surface water interactions in the River Awash Basin of Ethiopia. Hydrological characteristics are consistent with those observed in other semi-arid and arid basins where rivers are predominantly losing and act as a source of recharge rather than as a sink for groundwater discharge. Further, regional groundwater flow originating from the highlands exits the catchment rather than discharging to the riverine drainage. Consequently, groundwater abstraction from several regional-scale aquifers in the lowlands is not expected to impact river flow. However, salinity presents a major threat to irrigation and water supply. We identify critical areas for managing inflows, water use, wetlands and water quality that have significant implications for water security across the basin.
3 Jin, L.; Whitehead, P. G.; Bussi, G.; Hirpa, F.; Taye, Meron Teferi; Abebe, Y.; Charles, K. 2021. Natural and anthropogenic sources of salinity in the Awash River and Lake Beseka (Ethiopia): modelling impacts of climate change and lake-river interactions. Journal of Hydrology: Regional Studies, 36:100865. [doi: https://doi.org/10.1016/j.ejrh.2021.100865]
Climate change ; Salinity ; Chlorides ; Anthropogenic factors ; Modelling ; River basins ; Lakes ; Discharges ; Water resources ; Water quality / Ethiopia / Awash River / Lake Beseka
(Location: IWMI HQ Call no: e-copy only Record No: H050842)
https://www.sciencedirect.com/science/article/pii/S221458182100094X/pdfft?md5=26e72ef0a9fbc46f3632fac8f21d611a&pid=1-s2.0-S221458182100094X-main.pdf
https://vlibrary.iwmi.org/pdf/H050842.pdf
https://vlibrary.iwmi.org/pdf/H050842.pdf
(4.32 MB) (4.32 MB)
Study region: Awash River Basin, Ethiopia
Study focus: Many river basins in sub-Saharan Africa have become vulnerable due to the impact from climate change, weak governance and high levels of poverty. One of the primary concerns is the elevated salinity and the degradation of water quality in the Awash River. Located in the Great Rift Valley in Ethiopia, the Awash River has unique hydrochemistry due to water-rock interactions. However, in recent years, increasing anthropogenic activities including the discharge from saline Lake Beseka into the Awash River has caused some concern. This study used an Integrated Catchment Model to simulate chloride concentration in the Awash River Basin by taking both natural and anthropogenic sources of salinity into consideration. Future scenarios of climate change and Lake Beseka discharge were examined to assess the impact to the river water quality.
New hydrologic insights: Results show that Lake Beseka has made significant contribution to the rise of the salinity in the Awash River. If the trend of human interference (e.g. increased irrigation and unregulated water transfer) continues, the river downstream of Lake Beseka could see Cl increases up to 200 % in the near future (2006–2030). The modeling results are essential for generating long term plans for proper utilization of water resources especially in the region where the resources and the economic capacity to meet the water demand is lacking.
Study focus: Many river basins in sub-Saharan Africa have become vulnerable due to the impact from climate change, weak governance and high levels of poverty. One of the primary concerns is the elevated salinity and the degradation of water quality in the Awash River. Located in the Great Rift Valley in Ethiopia, the Awash River has unique hydrochemistry due to water-rock interactions. However, in recent years, increasing anthropogenic activities including the discharge from saline Lake Beseka into the Awash River has caused some concern. This study used an Integrated Catchment Model to simulate chloride concentration in the Awash River Basin by taking both natural and anthropogenic sources of salinity into consideration. Future scenarios of climate change and Lake Beseka discharge were examined to assess the impact to the river water quality.
New hydrologic insights: Results show that Lake Beseka has made significant contribution to the rise of the salinity in the Awash River. If the trend of human interference (e.g. increased irrigation and unregulated water transfer) continues, the river downstream of Lake Beseka could see Cl increases up to 200 % in the near future (2006–2030). The modeling results are essential for generating long term plans for proper utilization of water resources especially in the region where the resources and the economic capacity to meet the water demand is lacking.
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