Watershed Delineation Using ArcInfo 9.2 and LIDAR Data

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.