Delineation of Suitable Groundwater Recharge Zones from Earth’s Thermal Profiles in Ahar River Basin, Udaipur
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Date
2010
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MPUAT, Udaipur
Abstract
Groundwater is a precious resource of limited extent. A systematic planning of groundwater exploitation using modern techniques is essential for the proper utilization and management of this precious but shrinking natural resource. In the present study, Geographical Information System (GIS) is used to integrate multiparametric data to generate several thematic maps, delineate groundwater potential zones and identify sites of artificial recharge in the Ahar River Basin, Udaipur, Rajasthan (India). The “Thematic Layers” considered to delineate groundwater potential zones are geomorphology, recharge, depth to groundwater level, groundwater temperature, topographic elevation and discharge, which were prepared using conventional maps and data. All these themes and their individual features were then assigned weights according to their relative importance in groundwater occurrence and the corresponding normalized weights were obtained based on the Principal Eigen vector Analysis process. The “Thematic Layers” were finally added using ILWIS software to yield groundwater potential zone map of the study area. Thus, three different groundwater potential zones were identified viz., ‘good’, ‘moderate’ and ‘poor’. The area having ‘good’ groundwater potential is about 152.6 km2 which is about 44% of the total study area. Such region is in the north, north-east and north-west part of the Ahar river basin. The “Thematic Layers” used in this study to determine artificial recharge zones are groundwater temperature, recharge, groundwater level (pre and post-monsoon), topographic elevation. These layers were combined using isothermal and isobath maps of eleven months which are from august 2008 to June 2009 to delineate zones of suitability for artificial recharge structures. The area suitable for artificial recharge is 44.6 km2 which is 12.7% of the total study area.
Description
Delineation of Suitable Groundwater Recharge Zones from Earth’s Thermal Profiles in Ahar River Basin, Udaipur
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Citation
Mishra and Sharma, 2010