This watershed analysis was done for Cleveland Metroparks using their primary datasets. LIDAR was acquired from OSIP.
Watershed Delineation
1- Add reservation boundaries layer. Select a reservation. Zoom in.
2- Add Hydrology layer and detailed streams layer from H:\temp\Mosaics-10000\1-STREAM ORDER SHAPEFILES-10000
3- Add watershed layer from
4- Draw rough boundary of watershed around the reservation with draw tool.
5- Load the DEMS first by copying into V: drive and then decompressing the files using the command lines.
6- Mosaic the “filled” DEMS
7- Create subset of the entire mosaic
8- Use the special “other tools” watershed delineation tool. Set output destinations.
9- This will refill the filled mosaic. It will take a long time to run.
10- Infer the rivers from the “streams” output
11- Convert selected streams into new shapefile
12- Convert watershed raster to polygon
13- Use “select by location” or ‘select by attributes” to select the watershed polygons that contain the selected streams.
14- Create hillshade from the mosaic-ed raster DEM
15- create 2 ft and 5 ft contours from the mosaic-ed DEM
16- dissolve the polygon layer
17- DO NOT delete any of the intermediate layers
18- To correct errors put shapefiles into Geodatabase and set topology rules. Run.
For Urban Areas, Sewers, Storm Water Data, Pipes, Culverts etc.
1- First add the infrastructure network layer on to the map
2- Then activate Arc Hydro Tools 9
3- Under Terrain Preprocessing find the DEM manipulation
4- Under DEM manipulation find DEM Reconditioning
5- The Mosaic will be the Raw DEM
6- The AGREE Stream will be the network
7- AGREE DEM will be the output (name wisely)
8- Stream Buffer -5
9- Smooth Drop/Raise (DEM z unit) -10
10- Sharp Drop/Raise (DEM z unit) – 1000
I will update this later with step by step images, fails, and final product picture later.
