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Please use this identifier to cite or link to this item: http://hdl.handle.net/123456789/2151

Title: Ground Water Resource Evaluation and Management Practices in Gilgel Abay Catchment, Tana Basin
Authors: Beruke, Abel
Advisors: Dr.Seifu Kebede
Copyright: Jan-2010
Date Added: 3-May-2012
Abstract: Abstract Groundwater resource is the most important natural resource in the study area. The rapidly increasing agriculture, industry and domestic water supply requirements in the study area meet mainly from groundwater. Groundwater is usually protected against contamination from the surface by soils and covering rock layers. This why most drinking water in many areas of the world is groundwater. Due to steep increase in population along with the associated activities, the water demand for groundwater in the study area is maximized from time to time. However, water can be constraint if not properly managed and developed. Even though the water supply coverage of the study area is increases, a significant number of the water supply schemes in the catchment are non functional due to different reasons, which implies that no effective system of groundwater management practices in the area. The main objective of the present study is to evaluate the groundwater potential of Gilgel Abay catchment and to assess management issues in the catchment. To achieve this objective recharge to the groundwater was estimated based soil-water balance method and a value of approximately 489mm annual recharge to the catchments’ aquifer was obtained. In the catchment two aquifer systems were identified based the available well log data and pumping test data namely: Quaternary vesicular basalt and Tertiary scoracious basalt. The groundwater flow direction, recharge area, and discharge area were identified using chemical plotting of trends of major ions, TDS and EC. As the groundwater moves from recharge to discharge areas along its path it evolved from Ca2+- HCO3 type to Na+-HCO3 type. Concerning the management practices, five representative woredas with their respective PA which can characterize the whole water supply problem of the catchment were chosen for house hold water economy analysis. Findings of the study reveal that there are about 354 water supply points, out of which 94 non functional. Lack of skilled manpower, poor construction and maintenance, poor planning and management practices, low community participation are the main problems regarding the water supply schemes. Findings of the study also indicate high community participation, wide investment opportunity for private sector, capacity building of professionals and accountability and transparency of government officials are the main factors to sustain water supply schemes.
URI: http://hdl.handle.net/123456789/2151
Appears in:Thesis - Earth Sciences

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