Morphometric parameter extraction and analysis for watershed periodization over the Naka Roud Catchment

The aim of this research is watershed prioritization using morphometric parameters and Multiple Criteria- Decision- Making (MCDM) by Geographic Information System (GIS) and Remote Sensing (RS) techniques. For this purpose, First digital elevation model (DEM) was developed of study area using low frequency radar data, then, 17 watershed extraction for prioritization in ArcGIS10.2. After preprocessing and preparation of digital elevation model 14 morphometric parameters extracted including 5 Shape morphometric Parameters (Form factor, Elongation Ratio, Circularity Ratio, Compression ratio), 2 linear parameters (bifurcation ratio, Stream length), 5 areal parameters (Drainage Density, Drainage texture rate, Constant of channel maintenance, Stream frequency, Penetration ratio) and 3 topographic parameters (Relief ratio, Ruggedness number, Slope). The results of the evaluation of morphometric parameters by using AHP model showed that bifurcation ratio, Slope and Drainage Density With the most points (0.227, 0.174, 0.135)points Were in very much Acute condition and other watershed also were in very Acute condition And requires watershed management practices to protect water and soil resources