Morphometric Analysis of Saz-Çayırova Drainage Basin using Geographic Information Systems and Different Digital Elevation Models

Drainage basin/watershed analysis based on morphometric parameters has an essential role in watershed management and planning. Reliable delineation of watersheds drainage networks is critical for hydrological geomorphological studies. Since access to high-resolution digital elevation models (DEMs) surface (DSMs) costly, many researchers need evaluate low-resolution open-source products. Several data sources produced from different surveying techniques are used the analysis. In this study, five datasets such as Advanced Spaceborne Thermal Emission Reflection Radiometer (ASTER) GDEM, Shuttle Radar Topography Mission (SRTM) DEM, Land Observing Satellite (ALOS) DSM, National Aeronautics Space Administration (NASA) a DEM topographic maps (TOPO DEM), were investigated parameters. The tests was carried out Saz-Çayırova Basin, which one urbanization industrialization regions Kocaeli, Turkey. TOPO whose horizontal resolution 30 m, 1:25K scaled digitized topographical maps. It comparative analysis, all DEMs sources. parameters' result reference comparing results other addition, mean absolute percentage error (MAPE) compute accuracy between freely available each parameter. outcomes study reveal that most consistent with provided by SRTM following NASA DEM.