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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。
According to the measured data of 380 sediment transport rates and cross-section hydraulic parameters of Jingjiang Shashi hydrological station and Jianli hydrological station, the transport characteristics of transported sediment are analyzed and the relationship between transport sediment transport rate and flow rate is established The formulas of Engelund-Hansen and Einstein bed mass transport rate were tested and corrected by using the measured data. The results show that the measured annual sediment transport of Shashi Station and Jianli Station in Jingjiang River reach between 137 and 3.88 million tons, which mainly occurs from May to October in flood season, accounting for 75% of the whole year, and The average annual sediment transport of Shashi Station Section is less than that of Jianli Station. The transport bed sediment transport rate is proportional to the 1.3511 th power flow rate, and is significantly correlated. The Engelund-Hansen and Einstein formulas are directly used to calculate the systematic sediment transport rates of Jingjiang reach. The corrected formulas are in good agreement with the measured data and are highly correlated. The correction formula of Einstein is more relevant. The research results can be used for the calculation of bed sediment transport and river bed evolution in Jingjiang reach.