Watershed and stream network delineation using digital elevation models and spectral satellite information
نویسندگان
چکیده
We use the Global Multi-resolution Terrain Elevation Data 2010 (GMTED, 7.5 arc-seconds) and Landsat Maps Global Surface Water (GSW, 1 arc-seconds) processed by GRASS-GIS hydrological modules to derive a fully standardized stream network. The GSW water occurrence was burned into the GMTED surface to force the drainage direction, thereby directing the stream network to pass through the observed water body. We run an iterative process to identify the best carving profile and relative depth by combining water occurrence and elevation roughness. The obtained results are intended to be implemented at the global level.
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