日照北部重点海滩侵蚀现状与保护对策研究

Study on the Current Situation of Erosion and Protection Measures of Key Beaches in Northern Rizhao

分析了日照海滨国家森林公园海滩和日照万平口海水浴场海滩剖面在“温比亚”“利奇马”两场台风过境前后的监测数据,认为台风是引起海滩侵蚀淤积的一个重要因素。海滨国家森林公园海滩2个探槽均表现出浅部样品的分选性优于深部的特点,南部探槽样品的分选性优于北部探槽;万平口海水浴场海滩3个探槽均表现出中部样品的分选性优于浅部和深部的特点,中部和南部探槽样品的分选性优于北部探槽。这些数据可为滩肩抛沙提供粒径依据。海滨国家森林公园海滩北部和万平口海水浴场海滩宜采用人工养滩和离岸潜堤相结合的方法,以达到海滩保护修复的目的,可实现生态环境影响较少,无损于视觉景观的效果。

According to the investigation and research in recent years,the northern part of the beach of Rizhao Beach National Forest Park is in a state of erosion,while the middle and southern part is in a state of siltation.Besides,Wanpingkou Beach is in an erosive state.Based on the profile of the beachs before and after“Rumbia”and“Lekima”,it is considered that the typhoon is an important factor causing beach erosion and siltation.The sorting ability of the samples in the southern part of the beach of Rizhao Beach National Forest Park is better than that in the northern part,and the sorting ability of the samples in the shallow part is better than that in the deep part.The sorting ability of the samples in the middle and south of Wanpingkou Beach is better than that in the north,and the sorting ability of the samples in the middle is better than that in the shallow and deep,which provides the basis for sand throwing at the beach berm.As a result,a method of the combination of artificial beach nourishment and offshore submerged dike should be measured to protect and restore the northern part of the beach of Rizhao Beach National Forest Park and Wanpingkou Beach,with less damage in ecological environment and landscape.