Watershed and Stream Delineation Tool

 

Rumiņahui watershed in Ecuador.

 

The Watershed and Stream Delineation Tool delineates watersheds and streams of a hydrologic system, based on a digital elevation model (DEM) . The tool minimizes user input, and performs the entire delineation in a single process.

 

Tool interface.

The updated version 1.1 is now available

Input:

Digital elevation model (DEM)

Threshold (in number of cells)

Output folder

Output:

Filled DEM (fdem) 

Flow direction grid (fdr) 

Flow accumulation grid (fac) 

Streams grid (str) 

Links grid (lnk) 

Watersheds grid (wsh) 

Vectorized streams (strl) 

Vectorized watersheds (wshp) . Not displayed in view.

Vectorized and dissolved watersheds (wshdp)

    Output datasets are displayed in the ArcMap's view and saved in the user-defined output folder. The names in parenthesis are fixed. 

Software Requirements:

ArcInfo 8.1.2 or ArcView 8.1.2 or a later version

Spatial Analyst Extension 

To download the package:   

If you have installed either Visual Basic 6.0 or later, or Windows XP in your computer: 

        

           Click on the hyperlink and follow the instructions: WSDTSMALL.zip. The package is approximately 20 KB (less than 5 seconds with a 56.6 connection).

            It contains the wsdt dll and the readme file.

        

If you don't have installed Visual Basic 6.0 or later, and Windows XP in your computer: 

 

           Click on the hyperlink and follow the instructions: WSDTBIG.zip. The package is approximately 2 MB (less than 5 minutes with a 56.6 connection).

           It contains the wsdt dll, the readme file, and the required libraries for running the tool.

 

To know more about the tool:

    Watershed and Stream Delineation Tool by Milver Valenzuela

WSDT ver. 1.1 on June 14, 2002

An additional shapefile wshdp, in which watershed polygons with the same GRIDCODE are dissolved into a single polygon, is created. The attribute table of wshdp includes an AREA field 

on July 25, 2002

 

A "LENGTH" Field has been added to the strl's attribute table.

 

For questions, please contact:

Francisco Olivera

Milver Valenzuela


Francisco Olivera, Ph.D. - Assistant Professor and  Milver Valenzuela - Graduate Research Assistant
Texas A&M University - Department of Civil Engineering
Copyright Š 2002 TEXAS A&M UNIVERSITY. All rights reserved.
Revised: September 12, 2002 .