Integrated geospatial techniques for promoting groundwater recharge in lower bhavani river basin south india

Abstract

newline This dissertation proposes to promote groundwater development and artificial recharge planning in Lower Bhavani River basin of Tamil Nadu, India. The basin is one of the Sub-basin of Cauvery River located in Erode district of Tamil Nadu. Groundwater is a significant supply for drinking and irrigational purposes of any river basins. The continuous overexploitation of groundwater affects the irrigational activities of the basin. This work proposes to develop groundwater management planning with the help of Remote Sensing and GIS techniques. The research work includes i) Spatio-temporal rainfall and groundwater fluctuation analysis (ii) Understanding of morphometric characterization for watershed development planning (iii) Execution of distributed hydrological model for runoff estimation and (iv) Promoting groundwater recharge for sustainable development planning newlineTo achieve the objectives, a step by step process was adopted. Data for rainfall and water level was obtained from State Ground and Surface Water Resources, Data Centre, Tamil Nadu. The spatial distribution of rainfall pattern for 33 years (1983 2015) is observed from 22 rain gauge stations. The rainfall pattern was interpolated by the Inverse Distance Weighted (IDW) Method by using GIS software on monthly, seasonal and annual basis. The Isohyet Method was adopted, for the observation of relative contour trends, at equal intervals, over the basin. The mean annual rainfall of the study area was 666.84 mm. The highest monthly rainfall was found in the month of October (164 mm), and decreasing rainfall was observed in the month January (4.99 mm). The seasonal rainfall changes have found to be the highest during the Northeast monsoon season. Between 1983 and 2015, the year 2010 recorded the highest rainfall pattern in the area. newline newline