Abstract:
Watershed is an area, which catches the water from precipitation and then is drained by a river and its tributaries. It is a "resource region" where the ecosystem is closely interconnected around a basic resource - water. The watershed is therefore an ideal management unit. The watershed provides a powerful study and management unit, which integrates ecological, geographical, geological, and cultural aspects of the land. The watershed is also a useful concept for integrating science with historical, cultural, economic, and political issues. Geomorphology is the science of evolution of landforms in terms of its lithology, structure, basin geometry and other morphometric factors. Landforms on the earth surface are expensive to map or monitor. Remote Sensing observations from space platforms provide a synoptic view of terrain on images. Satellite multispectral data have an advantage in that the image data in various bands can be subjected to digital enhancement techniques for highlighting contrasts in objects for improving image interpretability. Landforms are interpreted on the basis of interpretation element keys namely such as- tone, texture, size, shape, color etc. and extract the specific information from the false color composites LISS-IV sensor images and SOI topographic sheet of the region. Geomorphological units are classified on the basis differential processes. In the study area, mainly Pediplain Moderately (Weathered), Pediplain Shallow (Weathered), Pediment, Mesa, Dyke Ridge, Denudational Hill and Residual Hill are predominant landforms. These above geomorphic units are mapped using IRS-ID LISS-IV satellite imagery using visual interpretation technique along with field check. Remote Sensing and GIS offers detecting, analyzing and time cost effective way to fulfill these goals. In this study, Remote Sensing and GIS, tools and techniques are used to identify landform, geomorphic units and area mapping because geomorphology is the base of watershed management. The study area is a small watershed in Telangana state namely Peddavagu mini watershed. The study area is situated between 77° 54' to 78° 26'east longitudes and 17° 01' to 17° 22' north latitudes and situated in the southwestern part of Telangana state. In this study area 8 mandals are covering. The study area has a population of more than 400000, which accounts for 0.27% of the total population of the Telangana State and households are 97,036. The climate of the study is characterized by a hot summer and is generally dry except during the southwest Monsoon season. The cold weather comes towards the end of November when the temperature begins to fall rapidly.

Keywords: Groundwater Management, Geotechnical, Geomorphology, Watershed, GIS, Remote Sensing, Stream Order, Geology, Slope, Aspect, Contour, Lineaments.