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首页> 外文期刊>The Science of the Total Environment >An overview of patterns and dynamics of suspended sediment transport in an agroforest headwater system in humid climate: Results from a long-term monitoring
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An overview of patterns and dynamics of suspended sediment transport in an agroforest headwater system in humid climate: Results from a long-term monitoring

机译：潮湿气候制剂中悬浮沉积物运输模式与动态概述：长期监测结果

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摘要

Small headwater catchments deliver large quantities of suspended sediment (SS) to the ocean. However, there are relatively few studies focused on the study of patterns and dynamics of suspended sediment in headwater catchments over the long-term (10 year or more). In this study, the dynamics of suspended sediment transport were examined at different time scales in a small headwater catchment in NW Spain, based on a 12-year dataset from high-resolution monitoring. The results revealed that, similar to other humid catchments, the hydrological response was highly dependent on initial conditions, especially in autumn and summer. However, in winter and spring the hydrology was more influenced by rainfall amount. The annual suspended sediment was 117 Mg, which equates to a suspended sediment yield of 10 Mg km(-2) y(-1). The SS yield in the Corbeira catchment is related to runoff generation and flooding, which play a key role in sediment yield from the catchment. About 80% of the annual SS was transported over 12% of the study period. Rainfall and discharge at the beginning of the events were the most important factors in explaining the hydrological response at event scale. Suspended sediment transport in this catchment is determined by event magnitude, while the SS is mainly influenced by variables related to runoff erosivity. (C) 2018 Elsevier B.V. All rights reserved.
机译：小型露出集水集聚量为海洋提供大量的悬浮沉积物（SS）。然而，有相对较少的研究专注于长期（10年或更长时间）的悬浮沉积物中悬浮沉积物的模式和动力学研究。在这项研究中，基于高分辨率监测的12年数据集，在NW Spain的小型露出集水区中的不同时间尺度进行了悬浮沉积物的动态。结果表明，类似于其他潮湿流域，水文反应高度依赖于初始条件，特别是在秋季和夏季。然而，在冬天和春天，水文受降雨量的影响更大。年悬浮沉积物为117毫克，相当于悬浮沉积物10mg km（-2）y（-1）。 Corbeira集水区中的SS产量与径流产生和洪水有关，这在沉积物产量中起着关键作用。大约80％的年度SS被运输超过12％的研究期。事件开始的降雨量和放电是在事件规模下解释水文反应的最重要因素。该集水区中的悬浮沉积物运输由事件幅度决定，而SS主要受与径流腐蚀性相关的变量的影响。 （c）2018年elestvier b.v.保留所有权利。

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