URBANISATION AND ITS IMPACT ON GROUNDWATER QUALITY USING REMOTE SENSING AND GIS BASED TECHNIQUES

Water assets, environmental quality, for example vegetation, greenery fauna, and geomorphological attributes are a portion of the significant components of a watershed. Watershed wellbeing can be gotten through a portion of the aberrant measurements, for example, an adjustment in precipitation spillover reaction, exhaustion of groundwater, groundwater contamination and geomorphological degradation attributes. In the present study, the application of remote sensing and Geographic information system (GIS) technologies has been demonstrated for assessment urbanisation and its impact on groundwater quality over a period of the last 30 years (1995-2017). Investigation includes estimation of urbanisation due to land use/land cover changes around the basin by knowing groundwater level, groundwater quality and rainfall. Remote sensing images of 1995, 2005 and 2016 have been used for extraction of land use/cover and urban growth. Groundwater analysis has been carried out in GIS to determine the change in groundwater and rainfall level and quality for a period of 1995, 2005 to 2017. Based on GWI, in both pre-monsoon and post-monsoon the groundwater was not polluted in upstream areas of the study area and it was vigorously dirtied simply subsequent to entering the Sarkar Samakulam zone of Coimbatore locale and proceeds till the finish of the investigation territory.