Application of Geo-Physical Methods to Characterize Solid Waste Landfill: The Case of Repi Landfill, South West Addis Ababa

Biruk, Berhanu W/Amanueal (2010) Application of Geo-Physical Methods to Characterize Solid Waste Landfill: The Case of Repi Landfill, South West Addis Ababa. Masters thesis, Addis Ababa University.

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Abstract

Water quality degradation is one of the major environmental problems in Addis Ababa and municipal solid waste disposal sites can be sources of groundwater contamination as leachate may infiltrate and join the aquifer. In Addis Ababa, there is currently one landfill site at Repi in the South West of the city located 13kms away from the city center. The Repi landfill site was commissioned more than 40 years ago and the only factors that were considered in selecting this site were hauling distance and availability of the land. Geophysical surveys, involving 2-D resistivity imaging and vertical electrical sounding were conducted around the solid waste landfill for a hydro-geophysical assessment of contamination of groundwater. IRIS SYSCAL R1 Plus switch-72 multinode imaging unit was used to acquire data both for the imaging and VES survey. In general 3 traverses for imaging and 3 VES measurement points along a profile were used for the study. The correlation between the 2-D resistivity imaging and the VES data is outstanding. The results clearly indicate that the underlying layers in this area around the landfill are weak incapable of preventing downward movement of the leachate from the landfill to the groundwater. Hence, the groundwater in this area may have been contaminated. Therefore, the usage of the landfill which is without geologically impermeable ground must be discouraged. It is also strongly recommended that a thorough study of any site must be done before any operation so as to know whether the aquifer is naturally sealed or not.

Item Type:	Thesis (Masters)
Subjects:	G Geography. Anthropology. Recreation > GE Environmental Sciences Q Science > QE Geology
Divisions:	Africana
Depositing User:	Selom Ghislain
Date Deposited:	24 Sep 2018 13:02
Last Modified:	24 Sep 2018 13:02
URI:	http://thesisbank.jhia.ac.ke/id/eprint/5488

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