Targeting groundwater potential zones using Electrical resistivity and GIS techniques in Kadavanar Sub-basin, South India

  • Karunanidhi D Department of Civil Engineering, Sri Shakthi Institute of Engineering and Technology, Coimbatore–641062, Tamil Nadu, India.
  • Suresh M Department of Civil Engineering, Jayalakshmi Institute of Technology, Thoppur, Dharmapuri- 636352, Tamil Nadu, India.
  • Subramani T Department of Geology, CEG, Anna University, Chennai – 600025, Tamil Nadu, India.
  • Anand B Department of Civil Engineering, Sri Shakthi Institute of Engineering and Technology, Coimbatore–641062, Tamil Nadu, India.
Keywords: Vertical electrical sounding (VES), Spatial variation of water level, Geographic Information System (GIS), Multi-criteria analysis, Groundwater recharge sites, Kadavanar Sub-basin

Abstract

Geographical Information System techniques are widely used to determine suitable sites for groundwater recharge through artificial recharge techniques. The present research work is to identify suitable locations for constructing artificial recharge structures in the Kadavanar Sub-basin, South India. People in the Sub-basin mainly depend on the groundwater resources for drinking and irrigation purposes. Groundwater resources are often overexploited in many parts of this Sub-basin to meet the water demand leading to groundwater consumption. A lot of surfaces and sub-surface information and criteria are required for mapping the groundwater recharge zone. This is where the geographic information system [GIS] provides the right impetus besides the groundwater prospective zone to harness multilayered spatial data so that multi-criteria analysis is possible. This analysis integrates historic rainfall data analysis, groundwater level fluctuation, stream network, aquifer thickness, land use/land cover and basin slope. Drainage map, slope map and land use/land cover maps were prepared from satellite imageries. Vertical electrical sounding (VES) geophysical survey with Schlumberger electrode configuration was also conducted in the basin at 50 locations to map the aquifer thickness. Spatial variation maps for groundwater level and aquifer thickness were generated using GIS. Weighted aggregation method was used in this study to obtain groundwater recharge maps. Finally, multi-criteria analysis has been carried out to identify and assess the potential sites for groundwater recharge according to the associated weightages. It is established that GIS is best suited for the mapping of groundwater recharge zones. A similar study can be extended to any other hard-rock region facing water crises.

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Published
2020-10-30
How to Cite
(1)
D, K.; M, S.; T, S.; B, A. Targeting Groundwater Potential Zones Using Electrical Resistivity and GIS Techniques in Kadavanar Sub-Basin, South India . ijceae 2020, 2, 54-73.



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