砂质海岸岸滩侵蚀演变模式探讨——以山东南部海岸侵蚀岸段的岸滩演变为例

Approach to the evolution model of sand coast erosion——A case study of eroded coast in south Shandong of China

在分析山东南部海岸几十年来的地形观测资料的基础上,运用砂质海岸等深线变化预测理论,建立该区的岸滩侵蚀演变预测模型,研究了该区域岸滩演变规律。实测资料验证表明:预测结果合理,基本反映了本区岸滩演变的特征。

In recent years, because of the extraction of the sand and the construction of reservoirs at upper reaches of the river, the beach erosion along the coast of south Shandong Province in China turns to be more and more obvious. The erosion is so serious that the ratio of coast retreat is as high as 1.3～3.4 m per year in some places. Even the government departments concerned begun to pay attention to the phenomenon. On the basis of the analysis on the landform observations for scores of years in this area, we tried in this paper to apply the equaldepthline forecasting theory to the study on the rule of coastal shoal evolvement in this area. We have established a forecasting model, which has the advantages of both the coastal line change model and the threedimensional landform evolution one.