Volume 9, Issue 26, January - December, 2023

Ground Water Modeling for Evaluation of Effect of Water Harvesting Structures on Groundwater Recharge

Kalgapurkar Anita^1♦, Gurunadharao VVS²

¹Professor, Department of Civil Engineering, St. Martin’s Engg. College, Dhulapally, Secunderabad, 500014, India
²Ex-Chief Scientist, NGRI, Hyderabad, India

^♦Corresponding author
Professor, Department of Civil Engineering, St. Martin’s Engineering. College, Dhulapally, Secunderabad, 500014, India

ABSTRACT

Many watersheds in state of Andhra Pradesh, India have ground water as the main source of water for agriculture as well as other purposes in absence of any irrigation project. One such watershed named Mondi–Gaurelli lies in semiarid regions of Andhra Pradesh. Geographical extent of watershed is 7.8 sq.km. Agriculture is mainly rainfed. Ground water is the main source of water. Ground water situation is very grim as groundwater development stage is over exploited and only 34 % area has good water potential zones. Geologically the area is underlain by granites. Dolerite dykes occurring as intrusive associated with pink granite are observed as residual hill range on the northern part of the micro watershed running approximately in E-W direction. Joints trending in NNE-SSW and N-S directions are prevalent in the area. There are number of fractures and lineaments conducive for water recharge. Therefore in the present work it was decided to assess ground water potential and situation by carrying out groundwater simulation and to judge the effect of water harvesting structures on ground water levels through modeling. One of the most popular and comprehensive deterministic ground water model VISUAL MODFLOW V 2.61 1995-97 developed by McDonald and Harbaugh of USGS has been used. Groundwater Modeling has shown that water-harvesting structures would increased the ground water storage by 92% during 96-97 for 734 mm of rainfall and 22% during 97-98 for a rainfall of 524 mm for same amount of groundwater withdrawal.

Keywords: Groundwater, Modeling, Recharge, Water harvesting structures

Climate Change, 2023, 9(26), e1cc1003

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DOI: https://doi.org/10.54905/disssi.v9i26.e1cc1003

Published: 21 July 2023