Spatial Distribution of Dissection Index (Erosion Intensity) versus Geomorphological Environment in Parkha Watershed, Central Himalaya

Abstract

In the present paper, an attempt has been made to study the spatial distribution of dissection index (Erosion Intensity)versus Geomorphological Environment in Parkha Watershed.Author have evaluated the morphometric characteristic on the basis of Survey of India toposheet at 1:50,000 scale .For this detailed study ,survey of India toposheet (1:50,000)were used for relief aspect of morphometric parameters. Dissection Index (the roughness of the earth surface) is a ratio between relative relief and absolute relief, consequently its range is a combined result of various geomorphic factors viz. lithology, absolute relief, relative relief, average slope and drainage density. A quantitative study is designed to investigate the impact of these factors upon dissection index. The correlation coefficient between dissection index and aforesaid factors show that absolute relief, relative relief, average slope and drainage density determine positive impact on the growth and development of varying degree of dissection in Parkha watershed