一、前言滦河呈反S形,由于河水的长年冲刷和淤积,河的弯度逐渐变小,趋向平直。滦河口位于渤海西北海岸的中部,海岸线比较曲折,它的开口朝东北。该海区水深较浅,海底坡度很小,由于径流和其他动力条件的作用,致使河口不断淤积延伸和改道。我们对秦皇岛(滦河口北65公里)和王滩(滦河口南45公里)两验潮站1980年的水位资 I. Introduction Luanhe was inverted S-shaped. Due to the long-term erosion and siltation of the river, the curvature of the river gradually becomes smaller and tends to be flat. Luanhe estuary is located in the middle of the northwest coast of the Bohai Sea, the twists and turns coastline, its opening toward the northeast. The shallow water depth of the sea and the sloping seabed are very small. Due to the effects of runoff and other dynamic conditions, estuaries continue to silt, extend and diversify. We Qinhuangdao (65 km north of Luanhekou) and Wangtan (45 km south of Luanhekou) two tide stations in the water level in 1980