Volume : VII, Issue : II, February - 2017

A SPATIAL ANALYSIS OF DISSECTION INDEX IN VARAHA NADI WATERSHED USING GEOGRAPHIC INFORMATION SYSTEM

A. Senthilvelan

Abstract :

 The word dissection index defines the roughness of the surface created by numerous valleys or ravines. It is an important parameter of drainage basin and useful in the study of the terrain and the stage attained by stream in the course of the evolution of basin concerned. Very high values of dissection closely correspond to youthful stage whereas low values are related to penultimate stage. An attempt has been made in this study to analyze the degree of roughness of the surface of the Varaha Nadi watershed. The numerical analysis of spatial distribution of dissection index shows that the category of very high dissection index occupies a larger area of 167.61 km2 which covers 43.33% of the total area of the watershed. The category of very low dissection index stands second in occupying the area of the watershed. It covers 33.49% (129.54 km2) of the total dissection area of the watershed. The low and high dissection index areas constitute 40.28 km2 (10.41%) and 32.12 km2 (8.30%) respectively. The moderate dissection index covers 4.46% of the total area of the watershed which occupies the area of 17.26 km2. 

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Article: Download PDF   DOI : 10.36106/ijar  

Cite This Article:

A. SENTHILVELAN, A SPATIAL ANALYSIS OF DISSECTION INDEX IN VARAHA NADI WATERSHED USING GEOGRAPHIC INFORMATION SYSTEM, INDIAN JOURNAL OF APPLIED RESEARCH : Volume‾7 | Issue‾2 | February‾2017


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