Groundwater Pollution Vulnerability in Relation to Topography and Land use/Land cover: RS and GIS aided case study for Bangalore District, India

Authors

  • Mrs.Shwetha A, Dr.Sampath Kumar M C, Dr.Rajyalakshmi M

Abstract

The main objective of this study was to obtain the relationship oftopography and Land Use/Land Cover (LU/LC) classes ongroundwater pollutionvulnerability using RS and GIS for Bangalore District. Here ArcGIS software and ERDAS IMAGINE software are used withAnalytical Hierarchy Process (AHP) to process different layers such as drainage map, a relief map, a Digital elevation map, and drainage network map. Topographic features like drainage network and relief likely have a substantial impact on groundwater pollution with Land Use/Land Cover classes which was divided into seven categories water bodies, forest land, grass, wasteland, wetlands, agriculture built-up, built-up area with very low, low, medium and high density. The urbanization index map was developed by overlaying all the maps to explain topographic impacts on groundwater contamination.Our research shows that due to urbanization, industrialization, and anthropogenic activities, topography has a major effect on groundwater pollution.

Water distribution in the study region showed a falling drift with a 59 percent decrease. The vegetation distribution also showed a declining trend with a 49 percent fall. The combined distribution showed a significant 109 percent rise. Other areas decreased by 40 percent in total. The development of form land and open spaces into developed areas on the outskirts of the city demonstratesan unsustainable growth of the town, which must be resolved, and there must be immediate action taken by the concerned authorities and eradicating the future damages at the earliest.

Keywords:Groundwater vulnerability, Topography, Land Use/Land Cover (LU/LC), RS, andArcGIS.

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Published

2020-05-18

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Articles