1. Download 1 Arc-Second SRTM Digital Elevation Model (DEM) from USGS EarthExplorer | Part 1
Watershed delineation is one of the most important step in hydrological modeling/analysis. Basic input requirement of watershed delineation is Digital Elevation Model also know as DEM. DEM can be processed in ArcGIS to delineate watershed/catchment/basin at any outlet.
in this video we will download Digital Elevation Model, DEM from United States Geological Survey, USGS Earth Explorer which is of one arc second and in geotiff format.
This video also shows that how you will create account on USGS earth explorer, how to select study area, dem tiles and finally how to download it..