Open Access
Subscription Access
Assessment of Surface Runoff and Sediment Yield using WEPP Model
The WEPP model is used to estimate the runoff and sediment yield at the outlet of the watershed. The WEPP model is used because of the hilly nature of the watershed. The slope of the watershed varies from 0 to 30%. The runoff and sediment yield at the downstream end is determined by the process of rainfall and runoff erosivity, sediment detachment, transport, and deposition in overland flow. Overland flow processes are usually conceptualized as a mixture of broad sheet flow (called interrill flow) and concentrated flow (called rill flow). Most often the two flow types are lumped and described as overland flow with computations based on a broad sheet flow assumption. Interrill erodibility and effective hydraulic conductivity were the calibration parameters for the WEPP model. The model calibration and validation has been done by comparing predicted monthly sediment yield and runoff data with observed one. The model predicted the runoff and sediment yield with highest R2 as 0.953 and 0.911 respectively. The model validation showed closer prediction of runoff and sediment yield with respective R2 as 0.94 and 0.722 respectively.
Keywords
WEPP, Runoff Erosivity, Overland Flow, Effective Hydraulic Conductivity.
User
Font Size
Information
- Arnold, J G., Williams, J R., Nick, A D. and Sammons, N. B. 1990. SWRRB: A basin scale simulation model for soil and water resources management. Texas A and M University Press, College Station, pp.125.
- Elliot, W. J. 2004. WEPP internet interfaces for forest erosion prediction. Journal of American Water Resource Association, 40: 299-309.
- Elliot, W. J. and Tysdal, L. M. 1999. Understanding and reducing erosion from in sloping roads. J. Forum, 97: 30-34.Elliot, W. J., Hall, D. E. and Graves, S. R. 1999. Predicting sedimentation from forest roads. J. Forum, 97: 23-29.
- Elliot, W. J., Robichaud, P. R. and Luce, C. H. 1995. Applying the WEPP erosion model to timber harvest areas. In: Proc. ASCE Watershed Manage Conf., August 14-16, 1995. San Antonio, pp. 83-92.
- Flanagan, D. C., Ascough, J. C., Nearing, M. A. and Laflen, J. M. 2001. The water erosion prediction project (WEPP) model. In: Harmon, R. S., Doe, W. W., III (Eds.), Landscape Erosion and Evolution Modeling. Kluwer Academic/Plenum Publishers, New York, pp. 145-199.
- Foster, G. R. and Lane, L. J. 1987. User Requirements: USDA-Water Erosion Prediction Project (WEPP). NSERL Rep. No. 1, Natl. Soil Erosion Res. Lab., USDAARS, West Lafayette, IN, pp. 43.
- Knisel, W. G. 1980. CREAMS: A Field Scale Model for Chemicals, Runoff and Erosion USDA, Washington D.C. 643.
- Lane, L. J. and Nearing, M. A. 1989. WEPP profile model documentation. NSERL Report No. 2. Ind.: USDA-ARS National Soil Erosion Research Laboratory, W. Lafayette.
- Luce, C. H. 1995. Forests and wetlands. In: Ward, A. D., Elliot, W.J. (Eds.), Environmental Hydrology. Lewis Publishers, Boca Raton, FL, pp. 253-283.
- Nearing, M. A., Foster, G. R., Lane, L. J. and Finkner, J. R. 1989. A processbased soil erosion model for USDA-water erosion prediction project technology. Trans. ASAE, 32(5): 1587-1593.
- Nicks, A. D., Lane, L. J. and Gander, G. A. 1995. Chapter 2: Weather generator. In: USDA Water Erosion Prediction Project Hillslope and Watershed Model Documentation. D.C. Flanagan and M.A. Nearing, eds. NSERL Report No. 10. West Lafayette, Ind.: USDA ARS National Soil Erosion Research Laboratory.
- Robichaud, P. R., Elliot, W. J., Pierson, F. B., Hall, D. E. and Moffet, C. A. 2007. Predicting postfire erosion and mitigation effectiveness with a web-based probabilistic erosion model. Catena, 71: 229-241.
- Young, R. A., Onstad, C. A., Bosch, D. D. and Anderson, W. P. 1987. AGNPS: An agricultural nonpoint source pollution model: A large watershed analysis tool. USDA Cons. Res. Rept., 35, pp. 77.
Abstract Views: 259
PDF Views: 1