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Script of an Algorithm to Adjust the DEM Derived Stream Slopes in Flat Areas from Terrain Analysis Modeling

Authors: Irene Garousi-Nejad · David Tarboton
Owners: David Tarboton · Irene Garousi-Nejad
Resource type:Composite Resource
Created:Nov 30, 2018 at 6:38 p.m.
Last updated: Nov 30, 2018 at 7:37 p.m. by Irene Garousi-Nejad


This resource includes the code (written in Python 3.6) and the documentation of a technique which is presented for adjusting the slopes of a Digital Elevation Model (DEM) derived drainage network where the slope is zero. The procedure uses the stream river network delineated from the grid-based DEM using Terrain analysis using Digital Elevation Models (TauDEM) software and re-compute the slopes considering the length and slope of all the upstream, downstream, and side entrance reaches. The results of this procedure is that all of the DEM-derived drainage network will have a positive (“downhill”) slope which are constrained to be greater than 0 m/m even when the elevation smoothing process produces equal upstream and downstream elevations on a flow line.

Subject Keywords

Slope Adjustment,Flat Area,DEM Derived Stream Slope,Terrain Analysis Modeling

How to cite

Garousi-Nejad, I., D. Tarboton (2018). Script of an Algorithm to Adjust the DEM Derived Stream Slopes in Flat Areas from Terrain Analysis Modeling, HydroShare, http://www.hydroshare.org/resource/4cfd2507de254ece86de1285092dec29

This resource is shared under the Creative Commons Attribution CC BY.


Sharing status:

  • Public Resource  Public
  • Sharable Resource  Shareable


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The people or organizations that created the intellectual content of the resource.

Name Organization Address Phone Author Identifiers
Irene Garousi-Nejad Utah State University
David Tarboton Utah State University Utah, US 4357973172 ORCID
This resource belongs to the following collections:
Title Owners Sharing Status My Permission
Terrain Analysis Enhancements to the Height Above Nearest Drainage Flood Inundation Mapping Method David Tarboton · Irene Garousi-Nejad  Private &  Shareable None


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