Sub-watershed prioritization based on potential zones of Kuttiadi river basin, A Geo-Morphometric approach using GIS

摘要

Natural potential zones of river basin provide an insight to developmental activities especially in rural areas. The present work is to identify the potential zones of sub-watersheds of Kuttiadi river basin. The Kuttiadi river basin is been divided into 47 sub-watershed and morphometric features of all sub-watersheds are calculated using Geographic Information System Technique using ArcGIS-10 software. The sub-watersheds were ranked according the value of morphometric parameters. Average of these ranking were used to classify sub-watersheds in three potential zones namely high, medium and high. The lineament, geology, geomorphology, slope and soil parameters of Kuttiadi river basin were also taken into consideration for the prioritization. The feature class data converted to raster based on assigned rank. Weighted sum of the raster layers reveals the potentiality of the each sub-watersheds of the river basin. Based on the potentiality the potential zones of sub-watersheds has been identified and quantified.