Seasonal and Interannual Changes in Sediment Transport Identified through Sediment Rating Curves
Seasonal and Interannual Changes in Sediment Transport Identified through Sediment Rating Curves
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DOI：
10.1061/(asce)he.1943-5584.0001466
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发表时间：
2017-02
影响因子：
2.4
通讯作者：
G. Bussi;S. Dadson;M. Bowes;P. Whitehead
中科院分区：
文献类型：
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作者：
G. Bussi;S. Dadson;M. Bowes;P. Whitehead
摘要低地河流的沉积物动态对于制定管理环境变化的弹性策略非常重要。然而，人们对自然和人为干扰对沉积物动力学的影响知之甚少。这里使用低频悬浮沉积物采样数据集来评估泰晤士河（英国）悬浮沉积物通量的空间和时间变化。沉积物评级曲线（SRC）用于分析流域悬浮沉积物输送的空间和时间变化。泰晤士河的 SRC 指数介于 0.21 和 1.13 之间。 95% 置信区间也是通过引导技术确定的。分析 SRC 参数的季节和年际变化，以揭示季节和长期变化。结果用于量化季节性冲刷效应，在夏季干旱期后的第一次洪水期间，悬浮沉积物浓度通常要高得多。悬念...
AbstractSediment dynamics of lowland rivers are of importance in building resilient strategies to manage environmental change. Yet the effects of natural and anthropogenic disturbances on sediment dynamics are poorly understood. Here a low-frequency suspended sediment sampling data set is used to assess the spatial and temporal variations of suspended sediment fluxes in the River Thames (United Kingdom). Sediment rating curves (SRCs) were used to analyze both the spatial and the temporal variation of catchment-suspended sediment transport. SRC exponents for the River Thames were found to be between 0.21 and 1.13. The 95% confidence interval was also determined through a bootstrapping technique. The seasonal and interannual variability of SRC parameters were analyzed to reveal seasonal and secular changes. The results are used to quantify the seasonal flushing effect, in which suspended sediment concentrations are typically substantially higher during the first floods after the summer dry period. The suspe...