椒江河口挟沙能力经验公式在其河床冲淤预测中的应用

发布时间：2018-04-20 10:16

本文选题：椒江河口 + 挟沙能力　；参考：《水电能源科学》2017年01期

【摘要】：为计算椒江河口的挟沙能力,依据近年来的水文泥沙实测资料,从"背景含沙量"概念入手,结合水流紊动作用与泥沙重力作用的对比关系,得出了适用于椒江河口的挟沙能力经验式。运用该式预测了短期内河床的冲淤趋势,并将预测结果与实测及数模计算数据进行了比较。结果表明,椒江河口背景含沙量的形成是由最大浑浊带的存在、潮波作用以及悬、底沙在径、潮流作用下频繁交换等几个因素引起;引入"背景含沙量"的挟沙能力经验式可较好地计算椒江河口的挟沙能力,可用于预测河床冲淤趋势,计算结果与实测情况基本一致。研究成果可用于椒江河口的河床冲淤估算,并为类似河口的闸下淤积预估提供了参考。
[Abstract]:In order to calculate the sediment carrying capacity of Jiaojiang River estuary, based on the measured hydrological and sediment data in recent years, starting with the concept of "background sediment content" and combining the comparative relationship between turbulence and gravity, The empirical formula of sediment carrying capacity for Jiaojiang River Estuary is obtained. This formula is used to predict the trend of erosion and deposition of river bed in a short period of time, and the predicted results are compared with the measured data and the calculated data of mathematical model. The results show that the formation of sediment concentration in the background of Jiaojiang Estuary is caused by the existence of the largest turbid zone, tidal wave action, suspension, bottom sediment diameter, frequent exchange under the action of tidal current, etc. The sediment carrying capacity of Jiaojiang River Estuary can be well calculated by introducing the empirical formula of "background sediment content", and can be used to predict the trend of river bed erosion and siltation. The calculated results are in good agreement with the measured results. The results can be used to estimate the erosion and deposition of Jiaojiang River Estuary and provide a reference for the prediction of sluice deposition in similar estuaries.
【作者单位】：南京水利科学研究院港口航道泥沙工程交通行业重点实验室;
【基金】：水利部公益性行业科研专项经费项目(201201070) 交通运输部重大科技专项项目(201132874640)
【分类号】：TV148

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