Basin delineate
Basin delineation: 1 patch up DEM Patch up the DEM using GRASS Basin delineation: 2 GRASS watershed analysis Use GRASS7 r.watershed module for analysing drainage direction and accumulated upstream area Basin delineation: 3 Python distilling Python script for analysing and distilling basin candidates, and producing GRASS script for step 4 Basin delineation: 4 GRASS basin delineation Use GRASS7 for delineating river basins