MORPHOMETRIC ANALYSIS USING REMOTE SENSING AND GIS TECHNIQUES IN CHITTAR SUB-BASIN, TAMILNADU, INDIA

Nithya. C. Nair, Y. Srinivas, N. Chandrasekar, S. Kaliraj, N. S. Magesh

Abstract


Morphometric characteristics of a basin explore the spatial relationship of geomorphologic features and hydrological processes. The present study deals with the morphometry evaluation of Chittar sub-basin using geospatial technology. Quantitative analysis of various morphometric parameters is performed using ASTER DEM (30m), Survey of India topographical map and Landsat ETM+ image. The study area consists of dendritic drainage pattern comprises eight orders of streams, of which first order stream is mostly dominated. The total areal extent of the sub-basin is 2406.43 km2.The mean bifurcation ratio (3.68) reveals that the drainage sub-basin have suffered less structural disturbance. The basin is found to be less elongate in shape with the length of 77.33 km. The elongation ratio of the sub-basin is 0.71, which suggests that the sub-basin is less elongated with high relief and steep slope. The basin falls under hard rock terrain comprised of quartzite, calcarious granulites, hornblende biotite gneiss associated with charnockite and limestone. Moreover, the morphometric study is very useful for understanding the drainage basin characteristics. It also finds application in rain water harvesting, water resource development and management.

Keywords


Morphometric analysis, Geospatial technique, Chittar sub-basin, South India

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