Abstract Exploration carried out along lineaments identified by aerial photo interpretation in hard rocks had revealed the existence of deep weathered and fractured zones capable of yielding up to 45,000 litres of groundwater per hour. Integrated studies of aerial photo interpretation followed up by hydrogeological and geophysical surveys was conducted in Hindupur taluk of Anantapur district in Andhara Pradesh for identification of groundwater potential zones for drinking water and for sugarcane development. Aerial photos of scale 1:63,000 were used covering an area of 1,600 km2. A number of lineaments running in NW-SE and NE-SW direction were identified using aerial photo interpretation. The studies have indicated a high density in lineaments in Dharwar rocks in Pennar and Jayamangali river basins and moderate to poor density of lineaments in granitic gneisses in Kushavathi and Chitravathi river basins. Fluvial deposits (alluvium), valleyfill deposits and pediment zones were also deciphered. Field checks during surveys along lineaments led to drilling of exploratory borewells. The drilling results indicated that the lineament zones are highly productive for construction of borewells, the maximum discharge being 45,000 litres per hour and the minimum being 9,000 litres per hour. Groundwater is mainly confined to weathered, fractured and fissured granites, gneisses and schists. Analysis of the lithologs indicated and increase in discharge in the fissured and fractured zones and at the contact of the different formations. The result of surveys along lineaments gives an insight into exploitation of groundwater along lineaments by means of borewells ranging in depths of up to 60 metres.
Identification of groundwater potential zones by integrated aerial photo interpretation and exploratory drilling in Hindupur taluk of Andhra Pradesh
Advances in Space Research ; 9 , 1 ; 67-73
1989-01-01
7 pages
Article (Journal)
Electronic Resource
English
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