Ephemeral gully channel width and erosion simulation technology
Tóm tắt
Concentrated surface runoff, such as associated with ephemeral gully channels, increases erosion and transfers fine sediment and associated agrichemicals from upland areas to stream channels. Ephemeral gully erosion on cropland may contribute up to 40 % or more of the sediment delivered to the edge of agricultural fields, significantly threatening the health of downstream ecological services. Typically, conservation practices developed for sheet and rill erosion are also expected to treat ephemeral gully erosion, but technology and tools are needed to account for the separate benefits and effects of practices on various sediment sources. Without improved research studies, subjective observations will continue to be used to satisfy quality criteria in lieu of scientifically defensible, quantitative methods to estimate the impact of gully erosion. Ephemeral gully channels evolve by one, or combination of, complex physical process in the form of incision, headcut migration upslope, and channel sidewalls expansion (widening). This study focused on the latter, ephemeral gully channel widening relationships. The impact of various width functions on erosion can be very significant and is dependent on discharge, slope, soil properties, and management conditions. A description is provided on six ephemeral gully widening relationships, followed by recommended improvements, comparative application, and identification of future research needs. Improvements in the development of ephemeral gully width algorithms are critical to understanding the impact of conservation practices on controlling ephemeral gully erosion. Tools are needed to predict and quantify ephemeral gully erosion, including the capability to evaluate the effect of conservation practices to control erosion. An improved critical shear stress equation was developed and described that provides an approach to incorporating impacts of management practices on the resulting gully erodibility. Conservation management planning by organizations needs a systematic approach to determining the extent of ephemeral gully erosion problems on a field, watershed, or national basis, or to predict the recurring or new locations of ephemeral gullies prior to their development.
Tài liệu tham khảo
Abdelwahab OMM, Bingner R, Milillo F, Gentile F (2014) Effectiveness of alternative management scenarios on the sediment load in a Mediterranean agricultural watershed. J Agric Eng 45(3):125–136
Alonso CV, Bennett SJ, Stein OR (2002) Predicting headcut erosion and migration in upland flows. Water Resour Res 38:1–15
Ascough JC II, Baffaut C, Nearing MA, Liu BY (1997) The WEPP watershed model: I. Hydrology and erosion. Trans ASAE 40(4):921–933
Bernard J, Bingner RL, Dabney SM, Langendoen EJ, Lemunyon J, Merkel W, Theurer F, Wells RR, Widman N, Wilson GV (2010) Ephemeral gully erosion—a natural resource concern. USDA-ARS National Sedimentation Laboratory Research Report. No. 69. US Department of Agriculture, Agricultural Research Service, National Sedimentation Laboratory, Oxford, MS
Bingner RL, Theurer FD (2001) AnnAGNPS: estimating sediment yield by particle size for sheet & rill erosion. In proceedings of the sedimentation: monitoring, modeling, and managing, 7th federal interagency sedimentation conference, Reno, NV, 25–29 March 2001. pp 1–7
Bingner RL, Theurer FD, Gordon LM, Bennett SJ, Parker C, Thorne C, Alonso CV (2007) AnnAGNPS ephemeral gully erosion simulation technology. In: Proceedings of the IV international symposium on gully erosion. September 17–19. Pamplona, Spain, J. Casali and R. Gimenez, eds. Public University of Navarre, pp 20–21
Bingner RL, Theurer FD, Yuan Y (2011) AnnAGNPS technical processes documentation, Version 5.2. USDA‐ARS National Sedimentation Laboratory. Oxford, MS
Capra A, Mazzara LM, Scicolone B (2005) Application of the EGEM model to predict ephemeral gully erosion in Sicily, Italy. Catena 59:133–146
Casali J, Lopez JJ, Giraldez JV (2003) A process-based model for channel degradation: application to ephemeral gully erosion. Catena 50:435–447
Chahor Y, Casalí J, Giménez R, Bingner RL, Campo MA, Goñi M (2014) Evaluation of the AnnAGNPS model for predicting runoff and sediment yield in a small Mediterranean agricultural watershed in Navarre (Spain). Agric Water Manag 134:24–37
Dabney SM, Vieira DAN, Yoder DC, Langendoen EJ, Wells RR, Ursic ME (2015) Spatially distributed sheet, rill, and ephemeral gully erosion. J Hydrol Eng 20(6):C4014009
Das S, Rudra RP, Goel PK, Gharabaghi B, Gupta N (2006) Evaluation of AnnAGNPS in cold and temperate regions. Diffuse Pollut VIII 53(2):263–270
Foster GR (1982) Channel erosion within farm fields. In ASCE specialty conference, Las Vegas, NV
Gordon LM, Bennett SJ, Bingner RL, Theurer FD, Alonso CV (2007) Simulating ephemeral gully erosion in AnnAGNPS. Trans Am Soc Agric Biol Eng 50(3):857–866
Gordon LM, Bennett SJ, Alonso CV, Bingner RL (2008) Modeling long-term soil losses on agricultural fields due to ephemeral gully erosion. J Soil Water Conserv 63(4):173–181
Hong HS, Huang JL, Zhang LP, Du PF (2005) Modelling pollutant loads and management alternatives in Jiulong River watershed with AnnAGNPS. Environ Sci 26(4):63–69
Kuhnle RA, Bingner RL, Alonso CV, Wilson CG, Simon A (2008) Conservation practice effects on sediment load in the Goodwin Creek Experimental Watershed. J Soil Water Conserv 63(6):496–503
Momm H, Bingner RL, Wells RR, Wilcox D (2012) AnnAGNPS GIS-based tool for watershed-scale identification and mapping of cropland potential ephemeral gullies. Appl Eng Agricu 28(1):17–29
Momm HG, Bingner RL, Yuan Y, Locke MA, Wells RR (2014) Spatial characterization of riparian buffer effects on sediment loads from watershed systems. J Environ Qual 43:1736–1753
Nachtergaele J, Poesen J, Steegen A, Takken I, Beuselinck L, Vandekerckhove L, Govers G (2001) The value of a physically based model versus an empirical approach in the prediction of ephemeral gully erosion for loess-derived soils. Geomorphology 40:237–252
Nachtergaele J, Poesen J, Sidorchuk A, Torri D (2002) Prediction of flow width in ephemeral gully channels. Hydrol Process 16:1935–1953
Parajuli PB, Nelson NO, Frees LD, Mankin KR (2009) Comparison of AnnAGNPS and SWAT model simulation results in USDA-CEAP agricultural watersheds in south-central Kansas. Hydrol Process 23:748–763
Renard KG, Foster GR, Weesies GA, McCool DK, Yoder DC, coordinators. (1997) Predicting soil erosion by water: a guide to conservation planning with the Revised Universal Soil Loss Equation (RUSLE). US Department of Agriculture, Agriculture Handbook No. 703, p 404
Souchere V, Cerdan O, Ludwig B, Le Bissonnais Y, Couturier A, Papy F (2003) Modelling ephemeral gully erosion in small cultivated catchments. Catena 50:489–505
Taguas EV, Yuan Y, Bingner RL, Gomez JA (2012) Modelling the contribution of ephemeral gully erosion under different soil managements: a case study in an olive orchard microcatchment using the AnnAGNPS model. Catena 98:1–16
Theurer FD, Clarke CD (1991) Wash load component for sediment yield modeling. In Proceedings of the fifth federal interagency sedimentation conference, March 18–21 1991, pp 7-1–7-8
Theurer FD, Alonso CV, Bernard JM (1996) Hydraulic geometry for pollutant loading computer models using geographical information systems to develop input data. In Proceedings of the sixth federal interagency sedimentation conference, March 1996, p 8
US Department of Agriculture (2009) Summary Report: 2007 National Resources Inventory, Natural Resources Conservation Service, Washington, DC, and Center for Survey Statistics and Methodology, Iowa State University, Ames, Iowa, p 123
USDA (1980) CREAMS: a field-scale model for chemicals, runoff, and erosion from agricultural management systems. In: Knisel WG (ed) Conservation Research Rep. No. 26, Washington, DC
Wells RR, Momm HG, Rigby JR, Bennett SJ, Bingner RL, Dabney SM (2013) An empirical investigation of gully widening rates in upland concentrated flows. Catena 101:114–121
Wilson G (2011) Understanding soil-pipe flow and its role in ephemeral gully erosion. Hydrol Process 25:2354–2364
Woodward DE (1999) Method to predict cropland ephemeral gully erosion. Catena 37:393–399
Yuan Y, Locke MA, Bingner RL (2008) Annualized agricultural non-point source model application for mississippi delta beasley lake watershed conservation practices assessment. J Soil Water Conserv Soc 63(6):542–551
Zema DA, Bingner RL, Denisi P, Govers G, Licciardello F, Zimbone SM (2012) Evaluation of runoff, peak flow and sediment yield for events simulated by the AnnAGNPS model in a Belgian agricultural watershed. Land Degrad Dev 23:205–215