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利用洛惠渠近二十年的实测资料 ,从泥沙颗粒沉速、流变特性等基本概念着手分析洛惠渠高含沙水流的特性。指出水流中含沙量的增大和细颗粒含量的增加 ,一方面使流体粘度增加 ;另一方面使流体容重增大 ,从而导致颗粒的沉速大幅度降低 ,甚至形成不分选泥浆。文章为进一步研究黄河等多沙河流的高含沙水流输沙提供了科学依据。
Based on the measured data of Luohui canal for nearly two decades, this paper analyzes the characteristics of the high sediment flow in Luohui canal from the basic concepts of settling velocity and rheological properties of sediment particles. It is pointed out that the increase of sediment concentration and the increase of fine particle content in the water flow will increase the fluid viscosity on the one hand and increase the bulk density of the fluid on the other hand, resulting in a drastic reduction of the sedimentation velocity of the particles and even the formation of unsorted mud. The article provides a scientific basis for further research on the sediment transport in the high sediment-laden flow of the Yellow River and other sandy rivers.