Identification Of Groundwater Potential Zones Using Time Series Analysisand Gis Applications In Palar River Basin, Tamil Nadu, India

Groundwater is a vital natural resource;it is occurring below the earth surface,where it occupies the void spaces in geologic strata. Hence, it plays economic provision of portable water supply in both urban and rural environment. Further, groundwater isa fundamental role in human beings, as well as that of some aquatic and terrestrial ecosystems (Burke and Monesh, 200; Hosseinifard and Mirzaei Aminiyan, 2015). At present, groundwater contributes around 34% of the total annual water supply as a fresh water resource (Ground Water Estimation Committee (GWRC), 1997).In general, recharge occurs only during the rainy season in tropical climates or during winter in temperate climates (Narasimhan, 1990).In the palar river basin region ground water is not available throughout the year, due to irrigation, industry and domestic purpose waters have pumping out. Besides, Palar river is not a perennial river, most of the period it is ephemeral in nature and dry stage,if monsoon starts the river gets filled up and gets replenished. Since a major portion of the water gets infiltrated, the river will run hardly for40-45 daysin the year (Rajaveni.S.P, et al., 2017). It is therefore essential to ensure the availability of groundwater throughout the year.The present study is carried out to find out the groundwater potential zones of the study area using statistical analysis of time series analysis (ARIMA model) and GIS applications, it is extremely significant in sustainable groundwater systems. Time series analysis have been commonly used in a broad range of scientific applications including hydrology, metrology, hydrogeomorphology etc (Pankratz, 1983). Box-Jenkies ARIMA model is adequate and appropriate one to find out the groundwater potential zone with influence of rainfall and water level(Thirumurugan, 2019). Besides, goodness of fit of 40 rainfall stations and 312 water level stations are established indifferent kind of fits i.e., 40-Excellent, 108-Good fit, 58-Poor fit and 106-No fit. Groundwater occurrences and behaviour of the region are controlled by geology, geomorphology, lineament, drainage and soil.