University of Natural Resources and Life Sciences, Vienna (BOKU) - Research portal
Gewählte Master / Diploma Thesis:
Eneyew Wondifraw Amberber
(2014):
GIS based Water Resources Assessment and Management of Wujraba Micro-Watershed, North Gondar, Ethiopia.
Master / Diploma Thesis - Institut für Hydraulik und landeskulturelle Wasserwirtschaft (IHLW),
BOKU-Universität für Bodenkultur,
pp 75.
UB BOKU
obvsg
FullText
- Abstract:
- Substantial amount of water resource research was conducted in Ethiopia focusing on watersheds level having only abundant water resources. For Wujraba-micro-watershed proper information of water resources is missing. The watershed has an area of 840 ha dominated by loam soil with rugged topography [ranges from 1895m, 2239m]. This work mainly focused on the assessment of existing water resources; investigation of management practices & watershed characterization. Hence, primary data was collected about water points & status of water supply infrastructures; NewLocClim & CROPWAT were used for water balance estimation; Runoff has computed by using SCS-CN method. Float method was used for river base flow measurement. ArcGIS used GPS points & DEM satellite image input data for watershed delineation & hydrology analysis. Calculated effective & mean annual rainfall values are 829 mm & 1248.4 mm respectively; daily average and annual ETo values are 4.4 mm/day & 1716 mm/year and runoff gave a value of 540.45 mm/year. The main stream Wujraba-River was measured (estimated) with 209 l/s and 42.4 l/s of peak discharge and base flow discharge respectively.Major existing water supply sources identified are: rivers, protected & unprotected springs, pumped & traditional hand dug wells. However, 50% of water supply infrastructures are non-functional and 50% are functional with poor management status. The survey revealed that high variation of ground water level leads to uncertain use of traditional hand dug wells. Conflicts are among watershed users & Aykel town communities because 46% of water supply sources for the town are from the Wujraba-micro-watershed. Inadequate & poor sanitation coverage is another problem. Recommended for long-term solution are: to cluster good yield wells for the water supply system, to construct community-ponds for livestock use, to introduce rainwater harvesting for both domestic and supplementary irrigation. All this should be done in an integrated water resources management and community based approach.
- Beurteilende(r): Loiskandl Willibald