清水冲刷不连续宽级配床面阻力特性及输沙规律试验研究(Ⅱ)——输沙规律

Experimental study of flow resistance and bed load transport of bed material with discontinuous wide-gradation sediment by clear water scouring(Ⅱ)——Bed load transport law

以天然河床中广泛存在的不连续宽级配床沙为例,开展了清水冲刷水槽试验研究。通过水槽试验对清水冲刷不连续宽级配床面推移质输沙率衰减规律、推移质级配及推移质输沙率的计算进行了分析与探讨,得到了清水冲刷不连续宽级配床面的一系列输沙规律,揭示了不连续宽级配床面与连续宽级配床面输沙规律的联系,为进一步认识不连续宽级配床沙提供了基础。

Flume experiments of bed load transport by clear water scouring were carried out for the discontinuous wide-gradation sediment that widely exists in natural rivers.According to the flume experiment data of steady clear water scouring,the decay law of bed load transport rate,bed load size distribution and calculation of bed load transport rate are analyzed.A series of transport law of discontinuous wide-gradation sediment bed by clear water scouring are obtained and the relation of discontinuous and continuous wide-gradation sediment is revealed,those provide the basis for the research about discontinuous wide-gradation sediment.