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Automated Vegetation Zone delineation for SNOW-17(VEG)

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Created:	Jun 25, 2026 at 9:47 p.m. (UTC)
Last updated:	Jul 12, 2026 at 9:43 p.m. (UTC)
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Sharing Status:	Public
Publication Status:	Pending Metadata Review This resource is under review for minimum metadata and to ensure that it adheres to community guidelines.
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Abstract

Provided is an ArcGIS tool and python code to create automated vegetation density zones for use in SNOW-17(VEG) snow model. SNOW-17(VEG) is an adaptation of the widely used and validated SNOW-17 temperature index model that incorporates vegetation structure. The method creates an EVI2 layer which it bins into vegetation zone categories. It then separates categories by elevation to create final elevation zones. Required inputs are a watershed shapefile or feature class, dem, and remotely sensed imagery that has Red and NIR bands.

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README.txt

Two tools to created automated vegetation zones for SNOW-17(VEG). One tool is a python code where the user should input paths for appropriate data layers. The other is an ArcGIS toolbox.

Required Inputs:
Watershed Shapefile
Watershed DEM (does not need to be clipped to the watershed but must cover the entire watershed)
Remotely sensed imagery (preferably from winter) that has red and near-infrared bands
Numbers for red and near-infrared bands as this can vary
Output folder

The code will create a folder within you output folder called "Intermediate Files".
The code will provide output shapefiles. Each shapefile will be for an elevation zone and will have the three vegetation zone levels within. Vegetation zones are separated by:
	Open: EVI@ < 0.1
	Moderate: 0.1 < EVI2 < 0.25
	Dense: 0.25 < EVI2

Values will be give based off determined vegetation density:
	Open = 1
	Moderate = 2
	Dense = 3

Related Resources

This resource belongs to the following collections:

Title	Owners	Sharing Status	My Permission
SNOW-17(VEG)	Lindsey Rotche	Public & Shareable	Open Access

Credits

Funding Agencies

This resource was created using funding from the following sources:

Agency Name	Award Title	Award Number
U.S. National Science Foundation	SRS RN: Transforming Rural-Urban Systems: Trajectories for Sustainability in the Intermountain West	2115169

How to Cite

Rotche, L. (2026). Automated Vegetation Zone delineation for SNOW-17(VEG), HydroShare, http://www.hydroshare.org/resource/dc15f7cab1964c89862aefd091c4fddc

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

http://creativecommons.org/licenses/by/4.0/

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