Assessment of Basin Morphometric Measurements Accuracy Based on Different DEM Data, Chai Dakuk Basin, Northeast Iraq: A Case Study

Morphometric analysis is essential in evaluating the geomorphological development and hydrological characteristics of rivers valley basins. Several studies used different DEM data to evaluate elevation accuracy or their impact on measurements limited morphometric parameters. The current study was carried out Chai Dakuk River basin northeastern part Iraq. bounded by latitudes 34°44'30"- 35°35'49"N longitudes 44°17'39"- 45°28'16"E. aims data, i.e., ASTER-GDEM 1-arcsec, SRTM 3- arcsec, ALOS-12.5 meters, GMTED 7.5 arcsec based reference points collected GPS top maps scale 1: 20000, resolution calculation parameters using ArcGIS- toolbox. results assessment identified 1arc-second more adequate with measurements; that, all other are compared 1- arcsec. show noticeable differences many calculated from data. Numbers lengths stream orders; bifurcation ratios; main channel length; drainage density; frequency; constant maintenance; compactness coefficient; texture; infiltration number; outlet height maximum basin, total relief, ruggedness number. According results, concluded that suitable for analysis, followed ASTER GDEM