Hydrogeomorphological Mapping of Palavay Basin Using Remote Sensing and GIS Techniques Anantapur District, Andhra Pradesh, India

G.Shobha Rani; B.Rama Narasimha Rao; K.Sunil Kumar; V.Gope Naik

Volume : V, Issue : VIII, August - 2016

Hydrogeomorphological Mapping of Palavay Basin Using Remote Sensing and GIS Techniques Anantapur District, Andhra Pradesh, India

G. Shobha Rani, B. Rama Narasimha Rao, K. Sunil Kumar, V. Gope Naik

Abstract :

Anantapur District is a hot and arid District, falls in rain shadow zone with a very low annual rainfall of 520mm. The recurrence of drought increased considerably and unless collective measures are initiated on a permanent basis the situation will become grim in future. Palavay Basin in Anantapur District is selected to demonstrate the capability of high resolution satellite data in ground water mapping. This basin is located in Survey of India toposheet Nos. 57F/2, F/3, F/4 and F/5. This basin with an area of about 205sq.km is underlined by Hornblende- biotite gneiss and Closepet Granites traversed by dolerite dykes. Hydrogeomorphological mapping was carried out on 1:10,000 scale using IRS-P6 LISS-IV satellite data. The satellite data facilitates to update the extent of built-up area, road and drainage network. Further, the revenue villages enclosed in the watershed are digitized, mosaic and superimposed on hydrogeomorphology map. This helps to give site specific recommendation on ground water prospects survey number wise i.e. for individual farmers. In addition, the impact analysis of check dams constructed in the watershed is also discussed. Studies showed that after construction of check dams the water levels in wells increased, abandoned wells got rejuvenated, new bore wells came up resulting increased irrigated area.