Utilize este identificador para referenciar este registo: http://hdl.handle.net/10362/14552
Título: Groundwater quality, vulnerability and potential assessment in Kobo Valley development project, Ethiopia
Autor: Belay, Fesseha Fentahun
Orientador: Costa, Ana Cristina
Mateu, Jorge
Ribeiro, Sara
Palavras-chave: WQI
GOD Rating System
Geostatistical Method
Weighted Arithmetic Mean
Aquifer Potential
Spatial Variability
Weighted Overlay Analysis
Data de Defesa: 27-Fev-2015
Resumo: This study deals with investigating the groundwater quality for irrigation purpose, the vulnerability of the aquifer system to pollution and also the aquifer potential for sustainable water resources development in Kobo Valley development project. The groundwater quality is evaluated up on predicting the best possible distribution of hydrogeochemicals using geostatistical method and comparing them with the water quality guidelines given for the purpose of irrigation. The hydro geochemical parameters considered are SAR, EC, TDS, Cl-, Na+, Ca++, SO4 2- and HCO3 -. The spatial variability map reveals that these parameters falls under safe, moderate and severe or increasing problems. In order to present it clearly, the aggregated Water Quality Index (WQI) map is constructed using Weighted Arithmetic Mean method. It is found that Kobo-Gerbi sub basin is suffered from bad water quality for the irrigation purpose. Waja Golesha sub-basin has moderate and Hormat Golena is the better sub basin in terms of water quality. The groundwater vulnerability assessment of the study area is made using the GOD rating system. It is found that the whole area is experiencing moderate to high risk of vulnerability and it is a good warning for proper management of the resource. The high risks of vulnerability are noticed in Hormat Golena and Waja Golesha sub basins. The aquifer potential of the study area is obtained using weighted overlay analysis and 73.3% of the total area is a good site for future water well development. The rest 26.7% of the area is not considered as a good site for spotting groundwater wells. Most of this area fall under Kobo-Gerbi sub basin.
URI: http://hdl.handle.net/10362/14552
Designação: Master of Science in Geospatial Technologies - TGEO
Aparece nas colecções:NIMS - MSc Dissertations Geospatial Technologies (Erasmus-Mundus)

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