Slowing the Flow in Pickering: Quantifying the Effect of Catchment Woodland Planting on Flooding Using the Soil Conservation Service Curve Number Method

Slowing the Flow in Pickering: Quantifying the Effect of Catchment Woodland Planting on Flooding Using the Soil Conservation Service Curve Number Method

H. Thomas T.R. Nisbet 

Centre for Ecosystems, Society & Biosecurity, Forest Research, UK.

Page: 
466-474
|
DOI: 
https://doi.org/10.2495/SAFE-V6-N3-466-474
Received: 
N/A
|
Accepted: 
N/A
|
Published: 
31 August 2016
| Citation

OPEN ACCESS

Abstract: 

The Soil Conservation Service (SCS) Runoff Curve Number method has been successfully applied to the Pickering Beck catchment at Pickering in North Yorkshire to assess the impact of land use change on flood flows. While limited-scale woodland creation (3% of the catchment) was predicted to have a small effect on the range of peak flows studied (<1% to 4% reduction), in line with previous model applications in the catchment, the conversion of the 25% cover of existing woodland to improved grassland produced a large increase in peak flow, up to 41% for a 1 in 100-year event. These numbers need to be treated with particular caution since the SCS method remains to be validated for UK conditions, however, they support growing evidence that woodland creation and management could have a significant role to play in flood risk management. The SCS method provides a potentially powerful tool for evaluating the impact of land-use change and management on flood runoff, as well as for identifying areas where such measures could be most effective.

Keywords: 

curve number method, flooding, land-use change, natural flood management, rainfall-runoff modelling

  References

[1] United States Department of Agriculture Urban hydrology for small watersheds, Technical Release 55 (TR-55), 2nd edn., Natural Resources Conservation Service, Conservation Engineering Division, 1986.

[2] Nisbet, T.R., Roe, P., Marrington, S., Thomas, H., Broadmeadow, S. & Valatin, G., Slowing the flow at pickering, final report phase II for the department of environment, food and rural affairs (Defra), Project RMP5455, Defra, London, 2015.

[3] Fuller, R.M., Smith, G.M., Sanderson, J.M., Hill, R.A., Thomson, A.G., Cox, R., Brown, N.J., Clarke, R.T., Rothery, P. & Gerard, F.F., Countryside Survey 2000 Module 7 LAND COVER MAP 2000 FINAL REPORT CSLCM/Final, Centre for Ecology and Hydrology, 2002.

[4] Boorman, D.B., Hollis, J.M. & Lilly, A., Hydrology of soil types: a hydrologically based classification of the soils of the United Kingdom, Institute of Hydrology Report No.126, Institute of Hydrology, Wallingford, 1995, available at http://www.ceh.ac.uk/products/publications/documents/IH126HYDROLOGYOFSOILTYPES.pdf

[5] Hawkins, R.H., Runoff curve numbers with varying site moisture. Journal of the Irrigation and Drainage Division, ASCE, 10(4), pp. 389–398, 1978.

[6] Ragan, R.M. & Jackson, T.J., Runoff synthesis using Landsat and SCS model. Journal of Hydrologics Division, ASCE, 106, pp. 667–678, 1980. http://dx.doi.org/10.1111/j.1752-1688.1980.tb02504.x

[7] Slack, R.B. & Welch, R., Soil conservations service runoff curve number estimates from Landsat data. Water Resources Bulletin, 16(5), pp. 887–893, 1980.

[8] Hawkins, R.H., Asymptotic determinations of runoff curve numbers from data. Journal of Irrigation and Drainage Engineering, 119, pp. 334–345, 1993. http://dx.doi.org/10.1061/(ASCE)0733-9437(1993)119:2(334)

[9] Lewis, M.J., Singer, M.J. & Tate, K.W., Applicability of SCS curve number method for a California Oak Woodlands watershed. Journal of  Soil Water Conservation, 55(2), pp. 226–230, 2000.

[10] Halcrow, Allan water natural flood management techniques and scoping study, Report to Scottish environment agency, 2011.

[11] Musgrave, G.W., How much of the rain enters the soil? Water Yearbook of Agriculture, U.S. Department of Agriculture: Washington, DC. pp. 151–159, 1955.

[12] Hjelmfelt, A.T., Investigation of curve number procedure. Journal of Hydraulic Engineering. ASCE, 117(6), pp. 725–737, 1991. http://dx.doi.org/10.1061/(ASCE)0733-9429(1991)117:6(725)

[13] Ponce, V.M. & Hawkins, R.H., Runoff curve number: has it reached maturity? Journal of Hydrologic Engineering, 1, pp. 11–19, 1996. http://dx.doi.org/10.1061/(ASCE)1084-0699(1996)1:1(11)

[14] Odoni, N.A. & Lane, S.N., Assessment of the impact of upstream land management measures on flood flows in Pickering Beck using Overflow. Forestry Commission, [Online], 2010, available at http://www.forestry.gov.uk/pdf/Pickering_crim_report_April_2010.pdf/$FILE/Pickering_crim_report_April_2010.pdf

[15] McIntyre, N.L. & Thorne, C.R. (eds), Land use management effects on flood flows and sediments – guidance on prediction CIRIA report C719 construction industry research and information association, London, 2013.