三峡水库下游荆江河段推移质输沙率计算方法分析

发布时间：2018-04-24 17:05

本文选题：荆江河段 + 推移质　；参考：《泥沙研究》2017年01期

【摘要】：根据荆江沙市水文站与监利水文站共380组次推移质输沙率与断面水力要素的实测资料,分析了推移质泥沙的输移特性,建立了推移质输沙率与流量之间的关系式,并利用实测资料对Engelund-Hansen和Einstein推移质输沙率公式进行了检验与修正。研究结果表明:荆江河段沙市站与监利站的实测推移质泥沙年输移量位于137~388万t之间,主要发生在汛期的5-10月,约占全年的75%,而且沙市站断面的年均输沙量小于监利站;推移质输沙率与流量的1.3511次方成正比,呈显著相关。Engelund-Hansen与Einstein公式直接用于计算荆江河段推移质输沙率均存在系统偏差,修正后的公式与实测资料吻合较好,呈高度相关,其中Einstein的修正公式相关度更高。研究成果可用于荆江河段推移质输沙量的计算与河床演变分析。
[Abstract]:Based on the measured data of load load transport rate and hydraulic factor of section of 380 groups of hydrological station and Jianli hydrological station in Shahai city of Jingjiang River, the characteristics of bed load sediment transport are analyzed, and the relationship between bed load transport rate and discharge is established. The formulas of bed load transport rate of Engelund-Hansen and Einstein are tested and corrected by using the measured data. The results show that the annual bed load transport at Shashi station and Jianli station in Jingjiang reach lies between 137 and 3.88 million tons, mainly in May to October of flood season, which accounts for 75 percent of the whole year, and the average annual sediment transport at the section of Shashi station is smaller than that of Jianli station. The bed load transport rate is directly proportional to the 1.3511 power of discharge, which is significantly correlated with. Engelund-Hansen and Einstein formulas are directly used to calculate the bed load transport rate in Jingjiang reach. The modified formula is in good agreement with the measured data and is highly correlated. The correlation of the modified formula of Einstein is higher. The results can be applied to the calculation of bed load transport and the analysis of riverbed evolution in Jingjiang River reach.
【作者单位】：长江科学院水利部江湖治理与防洪重点实验室;荆江水文水资源勘测局;
【基金】：国家自然科学基金项目(51379018,51339001,51579015,51679011)
【分类号】：TV142.2

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