SWAT Literature Database for Peer-Reviewed Journal Articles

Title:Sediment measurement and transport modeling: Impact of riparian and filter strip buffers 
Authors:Moriasi, D.N., J.L. Seiner and J.G. Arnold 
Journal:Journal of Environmental Quality 
Volume (Issue):40(3) 
Article ID: 
URL (non-DOI journals): 
Broad Application Category:hydrologic & pollutant 
Primary Application Category:sediment loss and transport 
Secondary Application Category:BMP and/or cropping system assessment 
Watershed Description:342 km^2 Cobb Creek in Oklahoma, U.S. 
Calibration Summary: 
Validation Summary: 
General Comments: 
Abstract:Well-calibrated models are cost-effective tools to quantify environmental benefits of conservation practices, but lack of data for parameterization and evaluation remains a weakness to modeling. Research was conducted in southwestern Oklahoma within the Cobb Creek subwatershed (CCSW) to develop costeffective methods to collect stream channel parameterization and evaluation data for modeling in watersheds with sparse data. Specifically, (i) simple stream channel observations obtained by rapid geomorphic assessment (RGA) were used to parameterize the Soil and Water Assessment Tool (SWAT) model stream channel variables before calibrating SWAT for streamflow and sediment, and (ii) average annual reservoir sedimentation rate, measured at the Crowder Lake using the acoustic profiling system (APS), was used to cross-check Crowder Lake sediment accumulation rate simulated by SWAT. Additionally, the calibrated and cross-checked SWAT model was used to simulate impacts of riparian forest buffer (RF) and bermudagrass [Cynodon dactylon (L.) Pers.] filter strip buffer (BFS) on sediment yield and concentration in the CCSW. The measured average annual sedimentation rate was between 1.7 and 3.5 t ha−1 yr−1 compared with simulated sediment rate of 2.4 t ha−1 yr−1. Application of BFS across cropped fields resulted in a 72% reduction of sediment delivery to the stream, while the RF and the combined RF and BFS reduced the suspended sediment concentration at the CCSW outlet by 68 and 73%, respectively. Effective riparian practices have potential to increase reservoir life. These results indicate promise for using the RGA and APS methods to obtain data to improve water quality simulations in ungauged watersheds.