江苏北部开敞淤泥质海岸的侵蚀过程及防护

开敞淤泥质海岸是淤泥质海岸的主要类型，其自然演变过程，主要受沿海河流泥沙供应条件的制约，一旦泥沙供应消失，海岸往往进入不可逆转的侵蚀过程。江苏北部淤泥质海岸的侵蚀过程，起自１８５５年黄河入海口北归利津入海以后，主要是在近岸破波对岸滩物质的冲刷和潮流的输移扩散作用下进行的。通过对淤泥质海岸动力和沉积物性质的认识和概化，对海岸侵蚀过程作出定量模拟，并对该地区海岸防护工程作出评价和讨论。

THE EROSION PROCESS OF OPEN MUD BEACH AND ITS PROTECTION ALONG THE COAST OF NORTHERN JIANGSU

A quantitative understanding of the pattern of coastal change is an essential prerequistite for the reasonable design of coastal engineering projects. Such an understanding is of course based on the correct recognition of physical background of the coast. Mud beach has its unique morphological feature and changing pattern, which differs from sandy coast. This paper, taking the mud beach as a studying object and putting emphasis on the dynamical background and changing pattern of the present coastal process, establishes a development model of coast erosion under natural conditions and engineering conditions and shows the theoretical maximum erosion profile. This model is proved by practical erosion profile in the Northern Jiangsu coast. The achievement of this study provides a scientific basis for the engineering protection of erosive mud beach and gives an example for establishing the theory of equilibrium profile in mud beach.