Morphometric analysis and prioritization of Palathodi watershed in Parambikulam-Aliyar basin, Tamil Nadu using RS and GIS

Abstract

: The geomorphological characteristics of a watershed are more commonly used for developing the regional hydrological models for solving the various hydrological problems of the ungauged watersheds or inadequate data situations. Therefore, in this study morphometric analysis and prioritization of twenty one sub watersheds of palathodi watershed, which is tributary of ParambikulamAliyar river basin considered for this study. The morphometric parameters considered for analysis are stream order, stream length, stream frequency, drainage density, drainage texture, form factor, circulatory ratio, elongation ratio, constant channel maintenance, length of over land flow and compactness constant. After analysis of morphometric parameters compound parameter values are calculated and prioritization rating of twenty one sub watersheds is carried out. The sub watershed (Malumichampatti village) 4 has lowest compound parameter value 6.1 is likely to be subjected to a maximum soil erosion; hence, it requires immediate attention for provisions of soil conservation measures.

Geospatial Approach for Quantitative Drainage Morphometric Analysis of Varuna River Basin, India

“…The use of computer has made GIS automated and today the technique is not only capable of handling large datasets, but can also solve many complex issues besides facilitating retrieval and querying of data. (Kumar et al, 2016) The present study draws connection between surface morphometry and subsurface geology of a drainage basin to prepare effective information as a part of basin management. So the aim of the present research is to interrogate all the morphometric characteristics of Varuna River basin and to recognize the impact of the basic topography on the morphometric characteristics.…”