根据水槽试验的结果，阐述了导沙坎防沙的原理、导沙坎附近水流及泥沙运动规律，分析了影响导沙坎导沙效果的几个主要因素：流速、导沙坎高度，以及导沙坎与水流的夹角．从推移质泥沙运动的机理出发，进行理论分析推导，得到导沙坎相对高度与相对水流强度的关系式，利用实际工程及模型实验的有关资料进行回归分析，确定出关系式的系数和指数，为实际工程的设计提供了科学的依格 According to the result of the tank test, the principle of sediment prevention and the movement of sediment near the sand guide ridge are expounded, and the main factors influencing the sand guide effect are analyzed: the flow velocity, the height of the guide sand ridge, Sand ducts and water flow angle. Based on the mechanism of sediment transport and sediment movement, theoretical analysis and deduction were made to get the relationship between the relative height and the relative water intensity of the sand guide ridge. Regression analysis was carried out based on the data of actual engineering and model experiments to determine the coefficients and indices , For the actual project design provides a scientific basis