Modelling sediment supply and transport in the River Lugg: strategies for controlling sediment loads
Whitehead, P. G., Lazar, A. N., Futter, M., Pope, L., Wade, A. J., Willows, R. and Burgess, C. (2010) Modelling sediment supply and transport in the River Lugg: strategies for controlling sediment loads. In: British Hydrological Society Third International Symposium: Role of Hydrology in Managing Consequences of a Changing Global Environment , 19-23 July 2010, Newcastle University, Newcastle upon Tyne, United Kingdom , pp. 1-6.
Official URL: http://www.ceg.ncl.ac.uk/bhs2010/
The River Lugg has particular problems with high sediment loads that have resulted in detrimental impacts on ecology and fisheries. A new dynamic, process-based model of hydrology and sediments (INCA- SED) has been developed and applied to the River Lugg system using an extensive data set from 1995–2008. The model simulates sediment sources and sinks throughout the catchment and gives a good representation of the sediment response at 22 reaches along the River Lugg. A key question considered in using the model is the management of sediment sources so that concentrations and bed loads can be reduced in the river system. Altogether, five sediment management scenarios were selected for testing on the River Lugg, including land use change, contour tillage, hedging and buffer strips. Running the model with parameters altered to simulate these five scenarios produced some interesting results. All scenarios achieved some reduction in sediment levels, with the 40% land use change achieving the best result with a 19% reduction. The other scenarios also achieved significant reductions of between 7% and 9%. Buffer strips produce the best result at close to 9%. The results suggest that if hedge introduction, contour tillage and buffer strips were all applied, sediment reductions would total 24%, considerably improving the current sediment situation. We present a novel cost-effectiveness analysis of our results where we use percentage of land removed from production as our cost function. Given the minimal loss of land associated with contour tillage, hedges and buffer strips, we suggest that these management practices are the most cost-effective combination to reduce sediment loads.
- Armstrong, J.D., Kemp, P.S., Kennedy, G.J.A., Ladle, M. and Milner, N.J. 2003. Habitat requirements of Atlantic salmon and brown trout in rivers and streams. Fish Res, 62,143–170. - Association of River Trusts. 2009. Using vegetation to protect soils: Buffer Zones – Practical examples. Pinpoint Best Practice Information Sheet 28.0b. - Bilotta, G.S. and Brazier, R.E. 2008. Understanding the influence of suspended solids on water quality and aquatic biota. Water Res, 42,2849–2861. - Blanco-Canqui, H., Gantzer, C.J., Anderson, S.H., Alberts, E.E. and Thompson, A.L. 2004. Grass Barrier and Vegetative Filter Strip Effectiveness in Reducing Runoff, Sediment, Nitrogen, and Phosphorus Loss Soil Sci. Soc. Amer. J., 68,1670–1678. - Boorman, D.B., Hollis, J.M. and Lilly, A. 1995. Hydrology of soil types: A hydrologically based classification of the soils of the United Kingdom. Report No. 126. Institute of Hydrology, Wallingford. 146pp. - Cohen, S. and Hindmarsh A. 1996. CVODE, a Stiff/Nonstiff ODE Solver in C. Comput. Phys., 10, 38–43 - Council of the European Union 2000. Water Framework Directive (2000/60/EC). Official Journal, L 327. 73pp. - Dabney, S.M., Liu, Z., Lane, M., Douglas, J., Zhu, J. and Flanagan, D.C. 1999. Landscape benching from tillage erosion between grass hedges. Soil Till. Res., 51, 219–231. - EA. 2009. Water for Life and Livelihoods, River Basin Management Plan. Severn River Basin District, Environment Agency, 64 pp. - EA .2003. River Wye Salmon Action Plan (2003 - 2008). Environment Agency, 29pp. - Gilley, J.E., Eghball, B., Kramer, L.A. and Moorman, T.B. 2000. Narrow grass hedge effects on runoff and soil loss. J. Soil Water Conserv., 55, 190–196. - Greig, S.M., Sear, D.A. and Carling, P.A. 2005. The impact of fine sediment accumulation on the survival of incubating salmon progeny: Implications for sediment management. Sci. Total Environ, 344, 241–258. - Jarritt, N.P. 2004. Catchment-scale sediment delivery: the development of a tool for the simulation of in-stream suspended sediment concentrations. Thesis R9636, University of Reading. - Jarritt, N.P. and Lawrence, D.S.L. 2007. Fine sediment delivery and transfer in lowland catchments: modelling suspended sediment concentrations in response to hydrological forcing. Hydrol. Process., 21, 2729–2744. - Jarvis, M.G., Allan, R.H., Fordham, S.J., Hazelden, J., Moffat, A.J. and Sturdy, R.G. 1984. Soils and their use in South East England. Soil Survey of England and Wales, Bulletin No. 15. Harpenden. - Jarvie, H.P., Jürgens, M.D., Williams, R.J., Neal, C., Davies, J.J.L., Barrett, C. and White, J. 2005. Role of river bed sediments as sources and sinks of phosphorus across two major eutrophic UK river basins: the Hampshire Avon and Herefordshire Wye. J. Hydrol., 304, 51–74. - Lazar, A.N., Butterfield, D., Futter, M.N., Rankinen, K., Thouvenot-Korppoo, M., Jarritt, N., Lawrence, D.S.L., Wade, A.J. and Whitehead, P.G. 2010. An assessment of the fine sediment dynamics in an upland river system: INCASed modifications and implications for fisheries. Sci. Total Environ., doi:10.1016/j.scitotenv.2010.02.030. - Liu, X., Zhang, X. and Zhang, M. 2008. Major factors influencing the efficacy of vegetated buffers on sediment trapping: A review and analysis. J. Environ. Qual., 37, 1667–1674. - Neal, C., Neal, M., Leeks, G.J.L., Old, G., Hill, L. and Wickham, H. 2005. Suspended sediment and particulate phosphorus in surface waters of the upper Thames Basin, UK. J. Hydrol., 330, 142–154. - Neitsch, S.L., Arnold, J.G., Kiniry, J.R. and Williams, J.R. 2005. Soil and Water Assessment Tool Theoretical Documentation - version 2005. Temple, Texas, USA. 494pp. - O’Shea, L. and Wade, A.J. 2009. Controlling nitrate pollution: an integrated approach. Land Use Policy, 26, 799–808. - Rabeni, C.F. and Smale, M.A. 1995. Effects of siltation on stream fishes and the potential mitigating role of the buffering riparian zone. Hydrobiologia, 303, 211–219. - Scheurer, K., Alewell, C., Bänninger, D. and Burkhardt-Holm, P. 2009. Climate and land-use changes affecting river sediment and brown trout in alpine countries - a review. Environ. Sci. Pollut. R.,, 16, 232–242. - Tetzlaff, D., Soulsby, C., Bacon,. P.J., Youngson, A.F., Gibbins, C. and Malcolm, I.A. 2007. Connectivity between landscapes and riverscapes - a unifying theme in integrating hydrology and ecology in catchment science? Hydrol. Process., 21, 1385–1389. - Wade, A.J., Butterfield, D., Griffiths, T. and Whitehead, P.G. 2007. Eutrophication control in river-systems: an application of INCA-P to the River Lugg. Hydrol. Earth Syst. Sci., 11, 584–600. - Wade, A.J., Durand, P., Beaujouan, V., Wessel, W.W., Raat, K.J., Whitehead, P.G., Butterfield, D., Rankinen, K.and Lepistö, A. 2002a. A nitrogen model for European catchments: INCA, new model structure and equations. Hydrol. Earth Syst. Sci., 6, 559–582. - Wade, A.J., Whitehead, P.G., Hornberger, G.M., Jarvie, H.P. and Flynn, N. 2002b. On modelling the impacts of phosphorus stripping at sewage works on in-stream phosphorus and macrophyte epiphyte dynamics: a case study for the River Kennet. Sci. Total Environ., 282-283, 395–415. - Walling, D.E., Collins, A.L. and Stroud, R.W. 2008. Tracing suspended sediment and particulate phosphorus sources in catchments. J. Hydrol., 350, 274–289. - Whitehead, P.G., Wilby, R.J., Battarbee, R.W., Kernan, M. and Wade, A.J. 2009. A review of the potential impacts of climate change on surface water quality. Hydrolog. Sci. J., 54, 101–124. - Whitehead, P.G., Wilson, E.J. and Butterfield, D. 1998. A semi distributed Integrated Nitrogen model for multiple source assessment in Catchments (INCA): Part I - model structure and process equations. Sci. Total Environ., 210/211, 547–558.
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