Shodh, Samiksha aur Mulyankan (International Research Journal)—ISSN-0974-2832,Vol. II, Issue-13 (Feb, 2010) 61 Rainwater after falling on the surface follows a natural law and Hows in the direction of slope. The total amount of rain waer, however, does not become available to mankind; as much of it is lost due to natural processes, such as : evaporation, evapotranspiration, runoff surface and subsurface, some quantity of rain water is held up by soil and subsoil which can be available to vegetation, but no to mankind to fulfill his requirements, either drinking or irrigation or for purpose of industries. The various processes mentioned above of the rainwater movement found to be confined to a unit of the earth surface that is termed as a ‘basis’ and therefore constitutes a fundamental basic unit in hydrological studies. Such fundamental unit is geomorphic feature, which can be demarcated with the help of topographic features, which can be demarcated with the help of topographic maps. In present study various parameters of the basin that are significance to ground water studies are outlined and the importance in context of harvesting of ground water has been detailed. Study Area :-The study area is a part of Purna river basin which located in western part of the district comprising Motala and Malkapur tahsil. Nalganga river is a left bank tributary of River Purna. It rises from Buldhana plateau with height of 690 meter. It flows towards north having length of 54.70 km and near Narwel Nalganga meets to river Purna. Nalganga basin lies between to N latitude and to East longitude (Fig.1) The elevation of the study area ranges from 690 to 216 m (Fig.1) above mean sealevel. The total area ot the basin is 1008 sq.km and perimeter is 199.30km. The soil texture is mainly clayey (i.e. Black Cotton Soil) having a slope up to 3% in majority of drainage area. Nalganga is flowing through Motala and Malkapur tahsils of Buldhana district. Material and Methodology :- Topographical maps (55D/1, 55D/2 ) were collected from Survey of India (SOI). The soil map collected from District planning map.The boundary of the study area and drainage network along with contour was delineated using SOI toposheets drawn 1:50,000 scale, (Fig2) Shows digilized drainage networks. Morphometric parameters were estimated from the Nalganga river basin in GIS environment. Morphometric Parameter estimation :-The conventional method of morphometric analysis is time consuming, tiresome and errorprone, while GIS technique overcome all these drawbacks associated with conventional method. Therefore in the present study the quantitative analysis of morphometric parameters is done for Nalganga basin in a GIS environment. The morphometric parameter estimated for the Nalganga river basin are as shown in Table-1. The basin is 1008 sq.km. It falls under semiarid region. The total length of Nalganga river is 75.40 km. The elevation of the study area ranges from 216 m to 690 m, above mean sea level. The soil texture ries from coarse to clayey (black cotton soil) having a slope of upto 3 percentage in majority of drainage area. The drainage pattern is dedritic, streams have been given order based on Strahler’s method (Fig.2). It is 6 th order drainage basin, having a drainage density of 1.8337 as shown in Table-1. The drainage density is indicative of the closeness of channels, thus providing a quatitative measure of average length of stream channel for whole basin. It also indicated about the physical properties of underlying rocks, lower value drainage density i.e.1.83 indicates region of highly permeable subsoil strata, Smith (1950) and Stralher (1957) described drainage density value less than 5.00 as coarse. The coarse texture gives more time for overland flow and hence no ground water recharge. Channel storage also varies with stream length as simple power function. Circularity ratio is low (0.318) will not generate runoff soon. Elongation-Circularity- Farm factor give fairly good estimates of hydrological MARPHO METRICAL PARAMETERS ESTIMATION OF NALGANGA RIVER, BULDHANA (M.S.) *Prof. Mrs.Pradnya Jangle ** Dr.Y.V.Patil *M.J.College, Jalgaon (M.S.) **Principal, Kisan College, Parola (M.S.)