The RHEM Web Tool

The RHEM Web Tool is a web-based interface for the Rangeland Hydrology and Erosion Model (RHEM). The interface allows users to input commonly known rangeland characteristics and use parameter estimation equations to construct model input files and run the RHEM model.

RHEM is designed to provide sound, science-based technology to model and predict runoff and erosion rates on rangelands and to assist in assessing rangeland conservation practice effects. RHEM is a newly conceptualized, process-based erosion prediction tool specific for rangeland application, based on fundamentals of infiltration, hydrology, plant science, hydraulics and erosion mechanics.

This web application was built with the following goals in mind:

Simplify the use of RHEM
Manage user sessions
Centralize scenario results (model runs)
Compare scenario results
Risk assessment
Provide tabular and graphical reports

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The RHEM Web Toolhtml
Main tool web site

Explore Data

Field	Value
Tags	NP215 NP211
Modified	2022-09-28
Release Date	2019-05-03
Identifier	487df117-9a3a-43fe-9129-bb39e1b87b3c
Publisher	United States Department of Agriculture
License	U.S. Public Domain
Contact Name	Armendariz, Gerardo
Contact Email	gerardo.armendariz@ars.usda.gov
Public Access Level	Public
Program Code	005:040 - Department of Agriculture - National Research
Bureau Code	005:18 - Agricultural Research Service

Extended Metadata:

Field	Value
Authors	USDA Agricultural Research Service
Peer Reviewed	No
Use Limitations	RHEM is currently a single storm runoff and erosion computer model. Parameter estimation equations have been developed based on the measured rangeland erosion plot data for the two primary erodibility and infiltration parameters (Kss and Ke). Parameter estimation for other input parameters, including concentrated flow detachment, are currently under development. The parameter estimation procedures for Kss and Ke are grouped according to dominant plant forms of sod-grass, bunch-grass, shrubs, and forbs with a different set of estimation equations for each grouping. Hence currently, the model may be parameterized and executed for undisturbed rangeland conditions.
Equipment or Software Used	CLIGEN
Funding Sources	Agricultural Research Service
Primary Article	Hernandez, M., Nearing, M. A., Al-Hamdan, O. Z., Pierson, F. B., Armendariz, G., Weltz, M. A., Spaeth, K. E., Williams, C. J., Nouwakpo, S. K., Goodrich, D. C., Unkrich, C. L., Nichols, M. H., & Holifield Collins, C. D. (2017). The Rangeland Hydrology and Erosion Model: A Dynamic Approach for Predicting Soil Loss on Rangelands. Water Resources Research, 53(11), 9368-9391. https://doi.org/10.1002/2017wr020651 AgID: 6472343
Related Articles	H. Wei, M. A. Nearing, & J. J. Stone. (2007). A Comprehensive Sensitivity Analysis Framework for Model Evaluation and Improvement Using a Case Study of the Rangeland Hydrology and Erosion Model. Transactions of the ASABE, 50(3), 945-953. https://doi.org/10.13031/2013.23159 AgID: 10746 Al-Hamdan, O. Z., Hernandez, M., Pierson, F. B., Nearing, M. A., Williams, C. J., Stone, J. J., Boll, J., & Weltz, M. A. (2014). Rangeland hydrology and erosion model (RHEM) enhancements for applications on disturbed rangelands. Hydrological Processes, 29(3), 445-457. https://doi.org/10.1002/hyp.10167 AgID: 1329454
Product Type	Model
Related Content	Documentation for the RHEM web tool The RHEM Web Tool scripts AGWA - Automated Geospatial Watershed Assessment Tool

Field	Value
ISO Topic(s)	environment
National Agricultural Library Thesaurus Term	soil erosion models rangelands equations models runoff prediction hydrology fluid mechanics computer software Natural Resources Earth and Environmental Sciences
Ag Data Commons Keywords	Agroecosystems & Environment
Program	Walnut Gulch Experimental Watershed Long-Term Agroecosystem Research - LTAR

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