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Beaverhead TMDL Planning Area Sediment Contribution
for the Montana Department of Environmental Quality
We calculated the upland erosion sediment load for four different scenarios regarding upland and riparian health conditions.
INTRODUCTION
This project provided an upland source assessment for use in future TMDL development as specified under the U.S. Clean Water Act.
OUR MODEL
We modeled upland sediment loading due to hillslope erosion using the Universal Soil Loss Equation and predicted sediment delivery to the stream using a sediment delivery ratio. This model provided an assessment of both existing sediment loading from upland sources and potential sediment loading through the application of best management practices.
