International Journal of Scientific Research in _______________________________ Research Paper . Multidisciplinary Studies E-ISSN: 2454-9312 Vol.5, Issue.10, pp.33-38, October (2019) P-ISSN: 2454-6143
Geomorphological Analysis of Landforms of Upper Cauvery Karnataka India Mohammed Badiuddin Parvez1*, M Inayathulla2 1,2
Dept. of Civil Engineering, UVCE, Bangalore University, Bangalore, Karnataka, India *Corresponding Author: parvezuvce@gmail.com Tel.: +919060506390 Available online at: www.isroset.org Received: 29/Sept/2019, Accepted: 16/Oct/2019, Online: 31/Oct/2019
Abstract: Landforms together make up a given terrain, and their arrangement in the landscape is known as topography. The Study Area lies between 750 29’ 19” E and 760 37’ 40” E longitude and 110 55’ 54” N and 130 23’ 12.8” N latitude. The study area covers an area of 10874.65 km2, having maximum length of 143.73 km. Drainage density is 1.43 km/km2 hence area is of coarse texture. The length of overlandflow is less than 0.4 indicating more runoff less infiltration. The study of hypsometric properties of watershed using hypsometric integral (HI) and hypsometric curve retrieved in that, HI value is 0.57 and hence watershed falls under the Mature Stage. Circularity ratio is 0.26 which shows that the drainage area is less circular. Keywords: DEM, Drainage Density, GIS, Hypsometry, Stream Frequency, Stream Length. I. INTRODUCTION The Cauvery river enters Tamil Nadu at Hognekal of Dharmapuri district from the west and takes a southern course from Mettur and again takes south-eastern course at Erode and then flows to Bay of Bengal flowing through Trichirapalli, Thanjavur and Cuddalore districts. The study area forms part of Cauvery basin, which lies on left banks of Cauvery river. Lakshmantirtha river is a major tributary to river Cauvery and has its originates in Brahmagiri Devasi Hills of Western Ghats in southern Kodagu district and flows through a distance of about 130 km. It enters the Mysore district near Chikkahejjur, south west of Konana Hosahalli in Hunsur taluk and flows through Hangodu, Hunsur and Kattemalavadi before its confluence with Cauvery on the right side at Sagarkatte in Krishnarajanagar taluk. Watershed is a natural hydrological entity from which runoff resulting from precipitation flows past a single point into large stream, river, lake or ocean. Morphometric analysis provides quantitative description of the basin geometry to understand initial slope or inequalities in the rock hardness, structural controls, recent diastrophism, geological and geomorphic history of drainage basin (Strahler, 1964). Morphometric analysis requires measurement of linear features, gradient of channel network and contributing ground slopes of the drainage basin. . A major emphasis in geomorphology over the past several decades has been on the development of quantitative physiographic methods to describe the evolution and behavior of surface drainage © 2019, IJSRMS All Rights Reserved
networks (Horton, 1945). The influence of drainage morphometry is very significant in understanding the landform processes, soil physical properties and erosional characteristics. The hypsometric analysis can be used as a morphometric parameter, i.e. hypsometric integral, to deduce its relationship with the area of watersheds. Statistical analysis of these parameters has been carried out by classifying them into different classes based on the natural breaks method. This brings out strong relationships for hypsometric integral classes and area classes with the number of watersheds in respective classes and the total area occupied by respective hypsometric and area classes. II. MATERIALS AND METHODS 2.1 Study Area The study area geographically lies between 750 29’ 19” E and 760 37’ 40” E longitude and 110 55’ 54” N and 130 23’ 12.8” N latitude, as shown in Fig 1, the study area has an area of 10874.65 Sq km. The maximum length and width of the study area is approximately equal to 143.73 km and 96.75 km respectively. The maximum and minimum elevation of the basin is 1867 m and 714 m above MSL, respectively. The study area covers five district of Karnataka state i.e., Chikmangalur, Hassan, Kodagu, Mandya and Mysore as shown in Fig 2. The maximum average annual rainfall in the catchment is 1072.66 mm has been recorded in the year 2005 and minimum average annual rainfall of 524.58 mm in 1998. June, July and August are the months with heavy rainfall and rainfall in July was the heavies
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