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综合沟渠网络维护对排水北方泥炭地森林径流量和水质的影响。

A synthesis of the impacts of ditch network maintenance on the quantity and quality of runoff from drained boreal peatland forests.

机构信息

Natural Resources Institute Finland, Viikinkaari 4, 00790, Helsinki, Finland.

Department of Forest Sciences, University of Helsinki, P.O. Box 27, 00014, Helsinki, Finland.

出版信息

Ambio. 2018 Sep;47(5):523-534. doi: 10.1007/s13280-017-0966-y. Epub 2017 Oct 29.

DOI:10.1007/s13280-017-0966-y
PMID:29080992
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC6072637/
Abstract

Drained peatlands are an important source of forest biomass in boreal regions and ditch network maintenance (DNM) operations may be needed to restore the drainage functions of ditches. By reviewing the available literature, as well as utilizing an existing hydrological model and analyzing the characteristics of eroded sediments, we assessed the impacts of DNM on runoff and exports of suspended solids (SS), dissolved organic carbon (DOC), nitrogen (N), and phosphorus (P). In general, DNM had minor impact on runoff and dissolved N and P, and it decreased rather than increased DOC exports. To increase the understanding of the hydrochemical impacts of DNM, future research should focus on the characteristics of SS and particulate nutrient exports. A major gap in knowledge is also the very limited regional representativeness of the available studies. High erosion risk in the ditches reaching the mineral soil below peat should be acknowledged when planning mitigation measures.

摘要

排干的泥炭地是北方地区森林生物量的一个重要来源，可能需要进行沟渠网络维护 (DNM) 作业来恢复沟渠的排水功能。通过回顾现有文献，以及利用现有的水文模型和分析侵蚀沉积物的特征，我们评估了 DNM 对径流量和悬浮固体 (SS)、溶解有机碳 (DOC)、氮 (N) 和磷 (P) 输出的影响。总的来说，DNM 对径流量和溶解的 N 和 P 的影响较小，反而减少了 DOC 的输出。为了提高对 DNM 水文化学影响的理解，未来的研究应侧重于 SS 和颗粒营养物输出的特征。一个主要的知识差距是现有研究的区域代表性非常有限。在规划缓解措施时，应认识到到达泥炭下方矿物质土壤的沟渠的高侵蚀风险。

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本文引用的文献

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Iron-rich colloids as carriers of phosphorus in streams: A field-flow fractionation study.富铁胶体作为溪流中磷的载体：现场流动分馏研究。
Water Res. 2016 Aug 1;99:83-90. doi: 10.1016/j.watres.2016.04.060. Epub 2016 Apr 26.
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Organic and inorganic carbon concentrations and fluxes from managed and unmanaged boreal first-order catchments.管理和非管理北方原始林一级集水区的有机碳和无机碳浓度及通量。
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Sci Total Environ. 2002 Oct 7;297(1-3):127-40. doi: 10.1016/s0048-9697(02)00129-8.
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Effect of ditching operations on stream-water chemistry in a boreal forested catchment.沟渠作业对北方森林集水区溪水化学性质的影响。
Sci Total Environ. 2001 Nov 12;279(1-3):117-29. doi: 10.1016/s0048-9697(01)00757-4.