长江上游推移质泥沙输移研究

Study on Bed-load Sediment Transport in Upstream of Yangtze River

针对目前长江上游精度较高的推移质输沙率公式还未公认接受的现状,利用长江上游8个测站(点)共计1 290组推移质运动实测资料,点汇无因次水流强度指标和泥沙输移强度相关关系,发现无因次W*-Φ的关系较好。然后根据输沙率公式的标准化对其关系式进行回归分析,并利用实测资料对回归公式进行了验证。结果表明,该公式较适用于长江上游河流的推移质输沙率公式,推荐在长江上游河流使用本文回归公式。

At present, no sediment transport formula describing bed-load is universally acknowledged and accepted for the upstream of Yangtze River. The correlations between various non-dimensional flow intensity indexes and non-dimensional sediment transport were analyzed according to 1290 sets of data from prototype observation of eight hydrologic stations. The results show that W^＊ and Ф have high correlation. Then regression analysis was carried out according to the standardized sediment transport formula with data of seven hydrometric stations at the upper reaches of Yangtze River and flume experiments data. From above analytic result, the formula suitable for the upstream reach of Yangtze River was figured out.