Will UK peatland restoration reduce dissolved organic matter concentrations in upland drinking water supplies?
Will UK peatland restoration reduce dissolved organic matter concentrations in upland drinking water supplies?
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DOI：
10.5194/hess-2020-450
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发表时间：
2020-11
期刊：
影响因子：
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通讯作者：
Jennifer Williamson;C. Evans;B. Spears;A. Pickard;P. Chapman;H. Feuchtmayr;F. Leith;D. Monteith
中科院分区：
文献类型：
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作者：
Jennifer Williamson;C. Evans;B. Spears;A. Pickard;P. Chapman;H. Feuchtmayr;F. Leith;D. Monteith
抽象的。自 20 世纪 90 年代初首次报道这一现象以来，溶解有机物 (DOM) 浓度的上升以及相关的水彩颜色的增加已经给英国水工业带来了潜在的问题。在以有机土壤为主的高地流域中，原水中的 DOM 浓度升高尤其值得关注，那里的 DOM 产量往往最高。近年来，自来水公司已经考虑了通过流域干预措施从源头改善原水质量的能力，从而减轻了处理厂对昂贵且复杂的工程解决方案的需求，但这些措施的有效性存在相当大的不确定性。主要证据差距之一是流域管理在抽象层面上能够影响 DOM 浓度的程度，现场研究很少超出子流域或河流规模。我们对已发表证据的审查表明，在某些情况下，流域管理可能有助于缓解近期 DOM 的增加，特别是在泥炭上种植人工林的情况下，以及控制径流中的养分可能减少水库内 DOM 产量的情况下。大多数旨在减少集水区到水库 DOM 负荷的其他措施的有效性证据仍然不足以支持更广泛的应用。总的来说，这些措施有可能降低饮用水水库中的 DOM 浓度，但必须根据具体地点进行选择，其中流域干预的规模、影响大小和持续时间应与工程的处理能力和未来预计的 DOM 趋势相关。
Abstract. Rising dissolved organic matter (DOM) concentrations, and associated increases in water colour, have posed a potential problem for the UK water industry since the phenomenon was first reported in the early 1990s. Elevated DOM concentrations in raw water are of particular concern in upland catchments dominated by organic soils where DOM production tends to be highest. In recent years, water companies have considered the capacity for catchment interventions to improve raw water quality at source, relieving the need for costly and complex engineering solutions in treatment works, but there is considerable uncertainty around the effectiveness of these measures. One of the primary evidence gaps is the extent to which catchment management is capable of influencing DOM concentrations at the point of abstraction, field studies rarely extending beyond sub-catchment or stream scale. Our review of the published evidence suggests that catchment management could make a contribution to mitigating recent DOM increases in some circumstances, particularly where plantation forestry has been grown on peat, and where control of nutrients in runoff could reduce in-reservoir DOM production. Evidence for the efficacy of most other measures that target reductions in DOM loading for catchment to reservoir remains insufficient to support wider scale application. Collectively, these measures have the potential to reduce DOM concentrations in drinking water reservoirs but they must be selected on a site-specific basis, where the scale, effect size and duration of the catchment intervention are considered in relation to both the treatment capacity of the works and future projected DOM trends.