ArkavathiReservoir_SurfaceWaterQuality

To analyze the surface water quality of the area, we begin by identifying the sub-watersheds using Survey of India (SOI) Topographic Maps of 1:50,000 scale – 57 H5, 57 H6, 57 H7, 57 H9, 57 H10, 57 H11. Based on the drainage features of the area, the study area is demarcated into six sub-watersheds and named accordingly (Table 1 in the article). Drainage map, Geology map, Contour map, and Digital Elevation Model (DEM) map are prepared using RS and GIS. Once the sub-watersheds are demarcated, surface water samples within these sub-watersheds are collected for further analysis as explained in the sections below. 30 samples were collected over a study period of two years covering three prominent seasons of pre-monsoon, monsoon, and post-monsoon periods (Fig. 5, 6 in the article). These samples were then subjected to various physical, chemical, and bacteriological tests such as pH, temp., DO, BOD, etc. (Bureau of Indian Standards: Public Safety Standards of the Republic of India: Chemical: Environmental Protection and Waste Management) to ascertain its usage for domestic purposes as well as for agricultural activities.