Identification of Potential Groundwater Zones in Semi-Arid Areas: A Case Study of Bahi District – Central Tanzania

Selassie Mayunga, Ally Mgelwa Ally

Research output: Contribution to journalArticlepeer-review

Abstract

This study used an integrated approach of Remote Sensing, Geographic Information System and Analytical Hierarchy Process to identify the potential groundwater locations in semi-arid area in Central Tanzania. Landsat8 data
was used to produce ten thematic layers of geomorphology, lithology, drainage density, lineament, rainfall, land use and land cover, magnetic intensity, slope, soil and watershed. The weights and ranking of the reclassified thematic layers were integrated into GIS and Analytical Hierarchy Process (AHP) to generate the groundwater potential map. The result shows that 5.1 % of Bahi district has very high potential locations of groundwater which is about 284.048 km2, 0.4% has good potential which is about 2,229.142 , 43.60% has moderate which is , 0.23% which is has poor and 0.67% which is very poor potential. The final potential groundwater map was validated using existing 35 bore holes and showed that 57 percent of the existing bore holes were on poor potential locations while 8.6
percent were on high potential locations. The identified high potential areas are mainly located towards Sulunga dam and towards the downstream in Bahi district. It was finally observed that the integration of remote sensing, GIS, and
Analytical Hierarchy Process is a powerful approach for identification of potential groundwater locations particularly in semi-arid areas
Original languageEnglish
Pages (from-to)8-20
Number of pages13
JournalInternational Journal of Engineering Science and Innovative Technology (IJESIT)
Volume8
Issue number3
Publication statusPublished - May 2019

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