Water Resources Conservation Plan for Rangapur Watershed in Middle Krishna Basin in Raichur District of Karnataka Using Remote Sensing and GIS

Abstract

The study area Rangapur watershed covers an area of about 2079 ha, is one of the drought prone areas in the middle Krishna Basin in Raichur district of Karnataka. An attempt is made to suggest location priority plan for the sustainable development of the area using GIS and remot e sensing techniques. The IRS P6 LISS III imagery was used for the preparation of land use/land cover and hydrogeomorphology maps. Geologically most of the watershed is covered by the rocks of Archean age i.e. granite gneiss. The major geomorphic units mapped in the area are shallow weathered pediplain, moderately weathered pediplain and structural valley. Among all, shallow weathered pediplain cover most part of the area. Arc Hydrology model of ArcGIS 10 version was used to propose various soil moisture conservation and water harvesting structures. From the results 22 nala bunds, 34 check dams and 141 boulder checks were suggested at different locations across streams. Thus it is recommended that water harvesting should be given importance to increase the groundwater recharge besides providing supplementary irrigation during rabi season.

Istraživanje je sprovedeno u oblasti sliva Rangapur površine 2079 ha, sušne oblasti u sredini basena Krishna. Predložen je plan prioriteta za održivi razvoj ove oblasti pmoću GIS i daljinske detekcije. IRS P6 LISS III snimci su korišćeni za pripremu mapa pokrivenosti i namene zemljišta i hidrogeomorfologije. Geološki, veći deo sliva je stenovit. Glavne geomorfne jedinice su mapirane. Arc Hydrology model programa ArcGIS 10 je upotrebljen da se predlože različite strukture za konzervaciju zemljišne vlage i skupljanje vode. Iz ispitivanih uzoraka predložene su različite lokacije duž tokova. Tako je preporučen o da je sakupljanje vode posebno važno za povećanje punjenja podzemnih izvora vode, uz obezbeđenje dopunskog navodnjavanja.