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土壤侵蚀是全球性的环境问题,河流输沙量常被用于评估流域的土壤侵蚀程度,而流域出口监测的输沙量是把整个流域内部当作"黑箱"处理,这可能会忽视流域内的侵蚀热点区或由于泥沙淤积而造成的潜在风险区。泥沙连通性这一概念可用于理解土壤侵蚀与泥沙输移过程及其时空分布。针对国内泥沙连通性研究刚刚起步的现状,梳理了泥沙连通性的研究方法,分别为实地观测法、示踪法、模型法、指标法和图论法五类。通过分析不同方法应用的优缺点,认识到今后的研究应在精确评估结构连通性的基础上,结合影响泥沙输移的外力因子及其对应的过程,探求量化流域内部泥沙输移动态的方法,以此为更精细的流域管理和泥沙连通性研究提供技术支持。
Abstract：Soil erosion is a global environmental problem. Sediment yield usually be used to assess soil erosion in a watershed. However,the whole basin was regarded as a "black box"in the processes,which may ignore erosion hotspots or potential risk areas caused by deporsition in the basin. The concept of sediment connectivity can be used to understand soil erosion and sediment transport processes as well as its spatial and temporal distribution. The research methods of sediment connectivity are studied,including field observation method,tracer method,model method,index method and graph theory method. Based on analysis of the application results,advantages and disadvantages of these different methods,future research should be based on the accurate evaluation of structural connectivity,combined with the external force factors that affect the sediment transport and the corresponding processes. The main goals try to explore methods of quantifying sediment dynamics within the basin,and to provide more detailed basin management approaches,and for further sediment connectivity studies.
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基本信息:
DOI：10.16239/j.cnki.0468-155x.2021.02.010
中图分类号:S157.1;TV142
引用信息:
[1]严晰芹,焦菊英,唐柄哲,等.泥沙连通性研究方法进展[J].泥沙研究,2021,46(02):59-65.DOI:10.16239/j.cnki.0468-155x.2021.02.010.
基金信息:
国家自然科学基金面上项目(41771319); 国家重点研发计划项目课题(2016YFC0501604)
2019-08-11
2019
2019-10-21
2021-02-20
2021
2
2021-02-20
2021-02-20
2021-02-20