Evaluation of field wetlands for mitigation of diffuse pollution from agriculture: Sediment retention, cost and effectiveness

被引:58
作者
Ockenden, Mary C. [1 ]
Deasy, Clare [1 ]
Quinton, John N. [1 ]
Bailey, Alison P. [2 ]
Surridge, Ben [1 ]
Stoate, Chris [3 ]
机构
[1] Univ Lancaster, Lancaster Environm Ctr, Lancaster LA1 4YQ, England
[2] Univ Reading, Dept Agr, Reading RG6 6AR, Berks, England
[3] Game & Wildlife Conservat Trust, Loddington LE7 9XE, Leics, England
关键词
Constructed wetlands; Diffuse pollution; Agriculture; Sediment; Catchment management; Mitigation measure; PHOSPHORUS RETENTION; WATER; RUNOFF; UK; MANAGEMENT; EROSION; REDUCE; POLICY; LOADS;
D O I
10.1016/j.envsci.2012.06.003
中图分类号
X [环境科学、安全科学];
学科分类号
08 ; 0830 ;
摘要
Diffuse pollution, and the contribution from agriculture in particular, has become increasingly important as pollution from point sources has been addressed by wastewater treatment. Land management approaches, such as construction of field wetlands, provide one group of mitigation options available to farmers. Although field wetlands are widely used for diffuse pollution control in temperate environments worldwide, there is a shortage of evidence for the effectiveness and viability of these mitigation options in the UK. The Mitigation Options for Phosphorus and Sediment Project aims to make recommendations regarding the design and effectiveness of field wetlands for diffuse pollution control in UK landscapes. Ten wetlands have been built on four farms in Cumbria and Leicestershire. This paper focuses on sediment retention within the wetlands, estimated from annual sediment surveys in the first two years, and discusses establishment costs. It is clear that the wetlands are effective in trapping a substantial amount of sediment. Estimates of annual sediment retention suggest higher trapping rates at sandy sites (0.5-6 t ha(-1) yr(-1)), compared to silty sites (0.02-0.4 t ha(-1) yr(-1)) and clay sites (0.01-0.07 t ha(-1) yr(-1)). Establishment costs for the wetlands ranged from 280 pound to 3100 pound and depended more on site specific factors, such as fencing and gateways on livestock farms, rather than on wetland size or design. Wetlands with lower trapping rates would also have lower maintenance costs, as dredging would be required less frequently. The results indicate that field wetlands show promise for inclusion in agri-environment schemes, particularly if capital payments can be provided for establishment, to encourage uptake of these multi-functional features. (C) 2012 Elsevier Ltd. All rights reserved.
引用
收藏
页码:110 / 119
页数:10
相关论文
共 34 条
[1]   Farmland birds and resource protection in the UK: Cross-cutting solutions for multi-functional farming? [J].
Bradbury, Richard B. ;
Kirby, Will B. .
BIOLOGICAL CONSERVATION, 2006, 129 (04) :530-542
[2]   Can constructed wetlands reduce the diffuse phosphorus loads to eutrophic water in cold temperate regions? [J].
Braskerud, BC ;
Tonderski, KS ;
Wedding, B ;
Bakke, R ;
Blankenberg, AGB ;
Ulén, B ;
Koskiaho, J .
JOURNAL OF ENVIRONMENTAL QUALITY, 2005, 34 (06) :2145-2155
[3]   Clay particle retention in small constructed wetlands [J].
Braskerud, BC .
WATER RESEARCH, 2003, 37 (16) :3793-3802
[4]   Factors affecting phosphorus retention in small constructed wetlands treating agricultural non-point source pollution [J].
Braskerud, BC .
ECOLOGICAL ENGINEERING, 2002, 19 (01) :41-61
[5]   Do macrophytes play a role in constructed treatment wetlands? [J].
Brix, H .
WATER SCIENCE AND TECHNOLOGY, 1997, 35 (05) :11-17
[6]  
Buric B., 2011, PAYMENT ENV SERVICES
[7]   Limitations of instantaneous water quality sampling in surface-water catchments: Comparison with near-continuous phosphorus time-series data [J].
Cassidy, R. ;
Jordan, P. .
JOURNAL OF HYDROLOGY, 2011, 405 (1-2) :182-193
[8]   Integrated management of in-field, edge-of-field, and after-field buffers [J].
Dabney, SM ;
Moore, MT ;
Locke, MA .
JOURNAL OF THE AMERICAN WATER RESOURCES ASSOCIATION, 2006, 42 (01) :15-24
[9]   Pathways of runoff and sediment transfer in small agricultural catchments [J].
Deasy, C. ;
Brazier, R. E. ;
Heathwaite, A. L. ;
Hodgkinson, R. .
HYDROLOGICAL PROCESSES, 2009, 23 (09) :1349-1358
[10]   Mitigation Options for Sediment and Phosphorus Loss from Winter-sown Arable Crops [J].
Deasy, Clare ;
Quinton, John N. ;
Silgram, Martyn ;
Bailey, Alison P. ;
Jackson, Bob ;
Stevens, Carly J. .
JOURNAL OF ENVIRONMENTAL QUALITY, 2009, 38 (05) :2121-2130