Identification of river basins within northwestern slope of Crimean Mountains using various digital elevation models (ASTER GDEM, ALOS world 3D, copernicus DEM, and SRTM DEM)

Since the end of 20th century, use geographic information systems and digital elevation models has reduced time required for improved quality morphometric analysis relief within river basins. However, researchers are constantly faced with problem choosing most accurate suitable terrain model their task. Many global, regional, local available. In this study, we comparatively analyzed accuracy ASTER GDEM, ALOS World 3D, Copernicus DEM, SRTM DEM spatial datasets purpose catchment basin modeling basins northwestern slope Crimean Mountains (Zapadnyy Bulganak, Alma, Kacha, Belbek, Chernaya Rivers) as an example. For each basin, calculated systematic, root mean square, absolute, standard square (Bessel’s correction), centered absolute errors by comparing data a 1:100,000 topographic map considered We found smallest error values 3D datasets; furthermore, used dataset to sub-basins Mountains. As result, identified these Zapadnyy Rivers, which represented stream basins, valleys, gullies, ravine systems.