长江上游推移质泥沙输沙率公式的检验

Verification on formulas of bed-load sediment transport rate at the upstream of Yangtze River

对现有推移质输沙率8个代表性计算公式,采取分散度比较法,利用长江上游8个测站(点)共计1 290组实测资料对其进行检验,以探讨其对长江上游输沙律的适用性。分析发现:各公式的计算结果非常分散,其中Engelund-Hansen公式精度相对最高,Yalin公式次之;若计算水流强度和输沙强度大的河流(如乌江、虎跳峡上峡口)时,Parker公式计算精度较高。各家公式并不适用于受下游峡谷洪水期雍水影响的河段(如奉节河段)。

Based on the analysis on 1290 sets of field observation data in 8 sites at the upstream of Yangtze River,8 formulae for bed-load sediment transport rate were verified by using dispersion degree method.It is found that a wide diversity of calculated results is obtained by different formulae.In general,Engelund-Hansen's formula has the relatively highest precision,Yalin's formula follows next.For the rivers of high flow intensity and transport intensity,Parker formula has relatively high accuracy.All these fo...