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坡面流阻力的研究对了解坡面流水流特性、汇流过程、土壤侵蚀和坡面产沙机理都非常重要。本文分5个方面总结了坡面流阻力研究的最新进展:(1)坡面流阻力系数与雷诺数的关系;(2)光滑床面上的坡面水流阻力;(3)粗糙床面上的坡面水流阻力;(4)降雨对坡面流阻力影响的研究;(5)坡面流阻力的计算模型。综合前人研究发现,阻力系数与雷诺数在不同的条件下呈正相关或负相关关系;用叠加法计算不同条件下的坡面流阻力有其合理的一面,也有不足之处;粗糙动床条件下的坡面水流阻力计算模型更接近实际情况。最后,本文指出了当前坡面流阻力研究存在的主要问题和未来需要突破的主攻方向。
Study on slope flow resistance It is very important to know slope flow characteristics, confluence process, soil erosion and slope sediment production mechanism. This paper summarizes the latest research progress of slope flow resistance in five aspects: (1) the relationship between the slope flow resistance coefficient and the Reynolds number; (2) the slope flow resistance on the smooth surface; (3) (4) Study on the effect of rainfall on slope flow resistance; (5) Calculation model of slope flow resistance. Based on the previous studies, it is found that there is a positive or negative correlation between the drag coefficient and the Reynolds number under different conditions. Using the superposition method to calculate the slope flow resistance under different conditions has its own advantages and disadvantages. The rough moving bed condition Under the slope of the flow resistance calculation model closer to the actual situation. Finally, the paper points out the main problems existing in the study of current slope flow resistance and the main direction of the future breakthrough.