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The role of woodland in flood control: a landscape perspective

机译:林地在防洪中的作用:景观观点

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Sustainable flood management is increasingly looking to the role of catchment land use in alleviating downstream flooding. Woodland presents a number of opportunities that are dependent on its location within the landscape. One way that woodland can attenuate flooding is through the greater water use by trees. The overall impact on the generation of flood flows, however, depends on the interaction of many factors and is most marked at the headwater level. Another way relies on the 'sponge effect'. Improved infiltration resulting from the targeted planting of sensitive soils or the use of down-slope woodland buffers could attenuate rapid run-off at the local scale. Finally, the greater hydraulic roughness associated with riparian and floodplain woodland can aid the retention and delay the passage of flood waters, potentially assisting downstream flood defence in larger catchments. This paper examines each of these opportunities and considers whether woodland can make a significant contribution to tackling future flooding as part of a whole-catchment approach to sustainable flood management.
机译:可持续洪水管理越来越多地探讨集水区土地利用在缓解下游洪水方面的作用。林地呈现出依赖其在景观内的位置的许多机会。林地可以减弱洪水的一种方式是通过树木的较大用水。然而,对洪水流动产生的总体影响取决于许多因素的相互作用,并且在下面的水平上最标记。另一种方式依赖于“海绵效应”。改善了由敏感土壤的靶向种植或使用下坡林地缓冲器的渗透可以在当地规模上衰减快速耗尽。最后,与河岸和洪泛平原相关的更大的液压粗糙度可以帮助保留和延迟洪水的通过,潜在地帮助较大集水区的下游防洪。本文审查了这些机会的每项机会,并考虑了林地是否可以为应对未来洪水进行处理的重要贡献,作为可持续洪水管理的全部集水机构的一部分。

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