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Please use this identifier to cite or link to this item: http://hdl.handle.net/123456789/264

Title: ASSESSMENTS OF GROUNDWATER AND ITS VULNERABILITY TO POLLUTION BY VERTICAL ELECTRICAL SOUNDING IN ADA’A PLAIN
Authors: TESFAYE, SHEWA
Advisors: Dr. Shimelis Fissiha
Copyright: 2007
Date Added: 16-Nov-2007
Publisher: Addis Ababa University
Abstract: The purpose of this study was to locate the possible water bearing horizons for ground water development by using the Vertical electrical sounding (VES) methods and assess the Groundwater vulnerability to pollution by aquifer vulnerability index (AVI) using resistivity result. The sample was taken from Ada’a plain. Ada’a plain is falls within in the upper part of Awash River Basin. It is located at the central parts of Ethiopia, in Oromia Regional State. It has an Elevation of 1600 and 1900 masl and approximately lies between latitudes 8 030’N and 8 0 45’N 38050'E and 39015'E. The results of data analysis indicate that at grater pseudo-depth along NNE-SSW margin of the study area has low resistivity values. The area favorable for ground water production is that characterized by low resistivity values i.e. the weathered layer and fractured zone have been identified as an aquifer. Parameters affecting vulnerability to pollution are mainly permeability and thickness of each protective layer. Aquifer vulenarabilty Index (AVI) which provides low, moderate and high classification ranges for expected protective layers, which can be deduced from indirect resistivity methods. The results of AVI values have shown that most Stations are the most vulnerable to pollution while Stations 48, 71, and 81 are the least Vulnerable to pollution. Therefore it can be recommended that ground water developers can use those specific localities to construct wells to tap ground water for the local people as well as the surrounding areas. It also recommended that careful should be taken when sitting any agricultural and other waste components for better safeguarding the groundwater resources.
Description: A Thesis Presented To The School Of Graduate Studies Of The Addis Ababa University In Partial Fulfillment Of The Requirements For The Degree Of Master Of Science In Environmental Science
URI: http://hdl.handle.net/123456789/264
Appears in:Thesis - Environmental Sciences

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