Abstract: India is blessed with good rainfall but however large of it lost through runoff and it can be impounded on the surface at suitable sites for surface storage. In recent decades groundwater is also threatened by over exploitation, contamination etc. The exploitation of groundwater resources more than its annual replenishment has caused continuous decline of water level, declined well yields, dry of shallow wells deterioration of groundwater quality and increase in cost of energy require to lift water from greater depth this scenario is seen in many pockets of over exploited groundwater regions in Andhra Pradesh. Chittoor district has no exception to it. In order to overcome the situation and increase the groundwater levels, the present study has been carried out to identify Water Harvesting Structures (WHS) in parts of Chittoor district, Andhra Pradesh. This study includes collection of rainfall data, cropping particulars, irrigation particulars and identification of existing water harvesting structures (WHS) and proposal of new WHS etc. to recharge and raise the groundwater levels in Karvetinagaram mandal. Twenty four harvesting structures (WHS) have been proposed with an estimated cost with 56.lakhs. The estimated storage capacity from both existing and proposed WHS is 174.52 ha. m. It is found that percolation tanks (PT) have more storage with 122.4 ha.m followed by check walls with 19.0 ha.m, check dams with 16.2 ha, mini-percolation tanks (MPT) with 11.8 ha.m, and staggered trenches with 5.04 ha.m.
Keywords: Rainfall, Groundwater recharge, water harvesting structures, groundwater levels, Chittoor district.
Title: Groundwater Recharge through Rainwater Harvesting Structures in Parts of Chittoor District, Andhra Pradesh
Author: K.LOKESH and S.VENKATESWARA RAO
International Journal Of Civil And Structural Engineering Research (IJCSER)
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