Watershed Delineation using DEM by using Hydrology tools of Spatial Analyst tools in ArcMAP
Hi Viewers,
This video describes the process of delineation of watershed using DEM (Digital Elevation Model) data by using Hydrology tools of Spatial Analyst tools of ArcMAP.
Steps to follow the procdedure:
1. Open DEM in ArcMAP
2. Open Hydrology tools of Spatial Analyst of Arc Tool box.
3. Go to Fill - Give DEM as input and select output - complete the process.
4. Go to Flow Direction - Give Fill data as input and select output - complete the process.
5. Go to Basin - Give Flow direction as input and select output - complete the process.
6. Go to Flow accumulation - Give Flow direction as input and select output - complete the process.
7. Go to Map algebra in Raster calculation under spatial analyst tool - select scale value for flow accumulation - ex. flow accu greater than 200 - Save.
8. Now Basin and Drainage rasters are generated.
9. Go to Conversion tools - From Raster - raster to polygon - Give basin raster as input and select output (vector data) polygon.
10. Go to Conversion tools - From Raster - raster to polyline - Give flow acc. calculated raster as input and select output (vector data) polyline.