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Using geospatial technologies to delineate Ground Water Potential Zones(GWPZ)in Mberengwa and Zvishavane District,Zimbabwe

引用

Journal of Groundwater Science and Engineering 2023年第4期11卷 317-332页

作者： Nyasha Ashleigh Siziba Pepukai Chifamba Department of Geospatial Science and Earth Observation Zimbabwe National Geospatial and Space Agency(ZINGSA)630 Churchill AveMount PleasantHarare Zimbabwe

The main objective of the study was to delineate Ground Water Potential Zones(GWPZ)in Mberengwa and Zvishavane districts,Zimbabwe,utilizing geospatial technologies and thematic *** factors,including geology,soil,rainfall,land use/land cover,drainage density,lineament density,slope,terrain Ruggedness index(TRI),and terrain wetness index(TWI),were incorporated as thematic *** Multi Influencing Factor(MIF)and Analytical Hierarchical Process(AHP)techniques were employed to assign appropriate weights to these layers based on their relative significance,prioritizing GWPZ *** integration of these weighted layers resulted in the generation of five GWPZ classes:Very high,high,moderate,low,and very *** MIF method identified 3%of the area as having very high GWPZ,19%as having high GWPZ,40%as having moderate GWPZ,24%as having low GWPZ,and 14%as having very low *** AHP method yielded 2%for very high GWPZ,14%for high GWPZ,37%for moderate GWPZ,37%for low GWPZ,and 10%for very low GWPZ.A strong correlation(ρof 0.91)was observed between the MIF results and groundwater *** study successfully identified regions with abundant groundwater,providing valuable target areas for groundwater exploitation and highvolume water harvesting *** identification of these crucial regions is essential for effective decision-making,planning,and management of groundwater resources to alleviate water shortages.

关键词： Groundwater resources Analytical Hierarchical Process Multi Influence Factor Lineaments density terrain wetness index Ground Water Potential Zone

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