The study area covers 1026 sq km comprising of 15 sub-watersheds, namely Saggiyam (SB-1), Mudoldoddi (SB-2), Halgapuram (SB-3), Deverabetta (SB-4), Mattugaudanadoddi (SB-5), Handgalli (SB-6), Manchepura (SB-7), Lokkanahalli (SB-8), Chinchalli (SB-9), Prakash palya (SB-10), Naripura (SB-11), Adugulpodu (SB-12), Ramayanadoddi (SB-13), Jodukara hatti (SB-14), Depudisahibradoddi (SB-15) which range in area from 16.87 to 180.02 sq km. Different morphometric parameters were evaluated to understand the drainage characteristics. The drainage pattern of these sub basins have been delineated using Geocoded FCC bands 2, 3 and 4, of IRS 1C and 1D (LISS 111+ PAN merged) on 1:50,000 scale and Survey of India Toposheets as reference. The morphometric parameters are computed using Arc Info and Arc View GIS software's. The drainage pattern of the study has shown dendritic to sub-dendritic drainage pattern with stream orders ranging from 4th to 5th order. The Drainage density ranges from 1.51 to 4.83 km/km 2 suggesting coarse to moderate drainage texture.The change in values of stream length ratio indicates their late youth stage of geomorphic development. The values of bifurcation ratio are ranging from 0.11 to 20.75 indicating that the study area is having strong structural control over the drainage pattern and all the sub basins fall under normal basin category. The values of form factor and circulatory ratio, suggest that the sub basins are elongated to circular in shape. Geographic Information System, when used with satellite images, could help in determining the morphometric parameters of watershed and river basins. It is concluded that remote sensing ground and GIS have been proved to be efficient tools in drainage delineation and updation.

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In the present study an attempt has been made to delineate and characterize the different geomorphic units of Muguru Addahalla watershed located in the southern part of Karnataka State, India. The drainage network and topographic elevation contours have been delineated using toposheets. The geological units have been overlaid on the Indian Remote Sensing (IRS)-1D LISS-111 satellite imagery. The study area is basically a drainage-controlled region wherein the fluviogeomorphological processes dominate on the surface. Based on the interpretation of satellite data, the hydrogeomorphic units like linear ridges, shallow moderate and deeply buried slopes, shallow valley fills and deep valley fills have been demarcated. These zones have been generated as vector layers using GIS and the geological and geomorphological maps of the study area have been compared. This integrated approach demonstrated that the IRS data used in conjunction with geology, drainage and topographic parameters helped in the evaluation of different geomorphological units and their characteristics. These features were also verified based on the field observations. The geomorphological units can be utilized for the management of natural resources.

Groundwater is becoming a scant resource in part of Kollegal taluk, Chamarajnagar District, Karnataka State. This area receives an average annual rainfall of 696 mm. Groundwater has been the major sources of irrigation and drinking purpose for several years almost 80 percent of area is underlain by hard rocks. The study area is drought prone, most of the people in this area depend on groundwater for drinking water and agriculture. Therefore, constant monitoring and assessment of water resource is necessary. The study area is bounded by Yelandur and T. Narasipura Taluk to the west, Mandya and Bangalore to the North, and East and South it is bounded by Dharamapuri District of TamilNadu this area is located in the south eastern corner of Karnataka. The area is located between 77 0 5 1 to 77 0 30 1 East longitude 11 0 45 1 to 12 0 15 1 North latitude with an areal extent of 1026sq km covering 138 villages coming under the Survey of India Toposheet (SOI) numbers are 57 H/4, 57H/7, 57H/8,, 58E/1 and 58E/5. The study area comes under the semiarid region. In recent years, this region has been facing water scarcity as well as water quality problems. The major sources of employment are sericulture, agriculture and horticulture, engaging almost 70% of the workforce. Water samples have been collected from 68 locations of the study area, during the monsoon year 2016, The collected samples were analysed for chemical parameters. In the study area Ca-Mg-HCO3 type of water predominates during the mansoon season of year 2016. On the basis of hydro-chemical facies classification the water is found to be suitable for irrigation.The other evaluated parameters are SAR, RSC, salinity sodium hazard and USSL Classification.