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Ground Water Resources Evaluation of Walga River Basin Central Ethioipia, South West Shoa

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dc.contributor.advisor Alemayehu, Tamiru Tamiru Tamiru Tamiru Tamiru
dc.contributor.author Beyene, Kassahun
dc.date.accessioned 2018-07-06T06:15:17Z
dc.date.available 2018-07-06T06:15:17Z
dc.date.issued 2005-03
dc.identifier.uri http://localhost:80/xmlui/handle/123456789/6793
dc.description.abstract Hydrometreological, geological, hydrogeological, hydrochemical investigation, basin & lake water balance calculation were made for groundwater resource potential evaluation of Walga Basin. Walga basin is part of the western central Ethiopian plateau.Geological investigations reveal that Walga area is found in the east-west trending Yerer-Tullu Welel volcano –tectonic structures and three litho-stratigraphic succession prevail in the area, which include Precambrian basement, Mesozoic sedimentary rocks and Cenozoic volcanics. Annual precipitation of the basin calculated from long term mean monthly rain fall data is 1259mm.The actual and potential evapotranpiration for the basin are 853mm and 1080mm respectively. The amount of evaporation from open water body (lake) is 6.6 Mcm.Of the total rain fall ,17.9% leaves the basin in the form of surface runoff and 13.8 % water infililtrate with in the basin which is the annual recharge of the basin. Most perennial streams emerge from the base of mountains in this area and drain the basin as gaining streams throughout & showing structurally controlled frow path.This also indicates that groundwater plays very crucial role in the hydrology of the basin. Based on qualitative and quantitative analysis of aquifer characterstics,the basin is categorized in to three aquifer sytemswhich are low,medium & high productivity aquifers.The scoraceous basaltic aquifer around Woliso area is the best well field with high well yield & permeability. Hydrogeological and geological maps are prepared from areal photographs and Satellite images & Field observations.Land sat –TM image is used also to identify lineament or structures in the basin together with areal ophotographs. en_US
dc.language.iso en en_US
dc.subject Walga en_US
dc.title Ground Water Resources Evaluation of Walga River Basin Central Ethioipia, South West Shoa en_US
dc.type Thesis en_US

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