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Hydrogeological studies
 
Remote Sensing
Remote sensing is an important tool in the study of natural resources. CGWB has used this technological tool for more than three decades for identifying and demarcating aquifer systems. Aerial photos and satellite images, in visual and infra-red spectral ranges, are utilized in regular ground water investigation programs of CGWB. In some of the R&D activities, colour infra-red and Radar products are also used in hydrogeological studies.
The existing thematic layers of geomorphology and ground water related information on 1:50,000 scale, compiled by the National Remote Sensing Centre (NRSC), are used in the aquifer mapping pilot study. The information from the layers is refined with additional detailed field observations and data.
Satellite images, LISS III, covering the pilot project areas are studied to refine the existing information on geomorphology (massive hilly regions, intruded high relief dykes, weathered zones, valley-fill deposits, drainage analysis & anomalies, abandoned / paleo drainage, sand dunes), geology, geological structures (fractures, faults, strike & dip directions), agricultural activity, hydrological features, soil conditions, etc. with the inputs from detailed field studies.
The information obtained from this study is integrated with the results of geophysical & hydrochemical studies. This spatial information is crucial in delineating areas of potential and non-potential aquifer zones. The information derived from remote sensing is also integrated with field data on irrigation, soil salinity, ground water stress areas and is finally useful in aquifer modeling studies.
 
3D Google earth view, Domal structure in the head water region, Baswa-Bandikui pilot project area, Dausa district, Rajasthan
 
3D Google earth view, Ravines, Baswa-Bandikui pilot project area, Dausa district, Rajasthan.
 
3D Google earth view, Basaltic terrain in Nagpur pilot project area, Maharasthra.
 
3D Google earth view, Levee and back swanp, Patna pilot project area, Bihar.
 
3D Google earth view, Paleo-course of Sone river, Patna pilot project area, Bihar.