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首页> 外文期刊>Journal of the American Water Resources Association >RUNOFF EVENT IMPACTS ON A WATER SUPPLY RESERVOIR: SUSPENDED SEDIMENT LOADING, TURBID PLUME BEHAVIOR, AND SEDIMENT DEPOSITION
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RUNOFF EVENT IMPACTS ON A WATER SUPPLY RESERVOIR: SUSPENDED SEDIMENT LOADING, TURBID PLUME BEHAVIOR, AND SEDIMENT DEPOSITION

机译：径流事件对供水水库的影响：悬浮泥沙负荷，紊流羽状行为和沉淀物沉积

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摘要

The impacts of runoff events on external suspended solids loading to Schoharie Reservoir, New York, and patterns of light scattering and sediment deposition in this reservoir are assessed. The assessment is based on monitoring of suspended solids concentrations in the reservoir's primary tributary, detailed vertical profiles of optical backscattering (a surrogate measure of light scattering) in the reservoir water column, and analysis of sediment trap collections, over a seven-month interval of high runoff. These impacts are reported to be tightly temporally coupled and strongly positively related to the magnitude of runoff events. The primary tributary entered the reservoir as a plunging inflow during runoff events, causing conspicuous subsurface peaks in light scattering, with vertical patterns that varied strongly for different events. Deposition quantified by near-bottom trap deployments is reported to be more representative than results from metalimnetic deployments that were generally within, rather than below, the turbid layers. Direct inputs of sediment, transported by density currents, are found to drive deposition, rather than resuspen-sion/redeposition. More than 50 percent of the reported deposition occurred in less than 15 percent of the study period, associated with the four largest runoff events.
机译：评估了径流事件对纽约Schoharie水库的外部悬浮固体负荷的影响，以及该水库中光散射和沉积物沉积的模式。该评估基于以下条件：监测储层主要支流中的悬浮固体浓度，储层水柱中光学背向散射的详细垂直剖面（光散射的替代量度）以及对沉积物捕集阱的分析（七个月的间隔）。高径流。据报道，这些影响在时间上紧密相关，并且与径流事件的大小密切相关。初级支流在径流事件期间以暴跌流入的形式进入储层，在光散射中引起明显的地下峰值，其垂直模式在不同事件中变化很大。据报道，用近底陷阱部署量化的沉积比通常在浑浊层内而不是在其之下的金属电磁部署的结果更具代表性。发现通过密度流输送的沉积物直接输入驱动沉积，而不是重新悬浮/重新沉积。超过50％的报告沉积发生在不到15％的研究期间，与四个最大的径流事件相关。

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