Location: Northwest Watershed Research CenterTitle: Estimating Sediment Yield on Disturbed Rangeland Using the Rangeland Hydrology and Erosion Model (RHEM)
|AL-HAMDAN, OSAMA - UNIVERSITY OF IDAHO|
|HERNANDEZ, MARIANO - U.S. DEPARTMENT OF AGRICULTURE (USDA)|
|Williams, Christopher - Jason|
|BOLL, JAN - UNIVERSITY OF IDAHO|
Submitted to: Meeting Abstract
Publication Type: Abstract Only
Publication Acceptance Date: 8/22/2014
Publication Date: 4/19/2015
Citation: Al-Hamdan, O., Pierson Jr, F.B., Nearing, M.A., Hernandez, M., Williams, C.J., Stone, J.J., Boll, J., Weltz, M.A. 2015. Estimating Sediment Yield on Disturbed Rangeland Using the Rangeland Hydrology and Erosion Model (RHEM) [abstract]. Joint Federal Intergagency Conference.
Technical Abstract: The Rangeland Hydrology and Erosion Model (RHEM) is an event-based model that estimates runoff, erosion, and sediment delivery rates and volumes at the spatial scale of the hillslope and the temporal scale of a single rainfall event. It represents erosion processes on normal rangeland, as well as, rangeland that exhibit some disturbance (such as fire or woody plant encroachment). RHEM adopts a new splash erosion and thin sheet-flow transport equation, and a new stream-power based concentrated flow erosion equation developed from rangeland data. It links the model hydrologic and erosion parameters with rangeland plant communities by providing a new system of parameter estimation equations. It is designed for government agencies, land managers, and conservationist to predict erosion processes on rangeland and assess the effects of rangeland conservation practices. RHEM was tested on rangeland sites that exhibit some degree of disturbance by fire and/or by tree encroachment and showed the capability of predicting the effects of such disturbances on soil loss.