IJEP 45(3): 283-292 : Vol. 45 Issue. 3 (March 2025)
1. Periyar Tiger Conservation Foundation, Periyar Tiger Reserve (East Division), Idukki – 685 509, Kerala, India
2. Periyar Tiger Reserve (East), Periyar Tiger Reserve, Idukki – 685 509, Kerala, India
3. Kerala Pollution Control Board, Idukki – 685 584, Kerala, India
Abstract
Surface water is an inevitable source of water, so we selected our project as a surface water quality assessment of Periyar lake using geopraphical information system (GIS). The study area, Periyar lake, lies 9°28′ to 9°35′ N latitude and 77°8′ to 77°17′ E longitude and spreads over 26 km2 is a vital source of water to residents, wildlife and farmers in Idukki, Theni, Madurai, Ramanathapuram districts. The advancement in GIS and spatial analysis helps to integrate laboratory analysis data with geographic data and to model the spatial distribution of water quality. The main objective of this study is to determine the spatial variability of surface water quality using GIS. A total of 16 water samples were collected from different locations throughout the study area with the help of GPS. The physico-chemical parameters of the samples were determined from different locations in Periyar lake. Sample lake location is obtained using GPS and the locations are imported into quantum GIS to create a point feature. Spatial maps were generated in GIS by interpolation of the inverse distance weighted technique. From the results, it is concluded that the water quality of the lake is within the permissible limits. The few inlet points of the lake are polluted because of the wastewater from nearby settlements.
Keywords
Surface water quality, Inverse distance weighted method, Periyar lake, Geopraphical information system
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