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通过对海南万宁东部海岸的现场调查和剖面监测,分析了该区域海岸侵蚀的现状和原因。万宁东部海岸普遍受到侵蚀威胁,具体的侵蚀现象包括侵蚀陡坎频现、沙滩宽度变窄、滩面蚀低、养殖排水冲蚀滩面和防护林侵蚀掉落。根据侵蚀的严重程度将侵蚀类型分为三种:周期性侵蚀,持续性侵蚀和陡崖性侵蚀,陡崖性侵蚀最为严重,持续性侵蚀次之,周期性侵蚀最轻。侵蚀原因可分为自然因素和人为因素两个方面,自然因素包括沿岸海洋动力、台风和风暴潮、海平面上升;人为因素包括兴建养殖池塘、砍伐防护林、钛锆砂矿开采和前滨采砂等。自然因素虽然在海岸侵蚀的历史中起着很重要的作用,但是人为因素才是近期海岸侵蚀的主要原因。
Based on the field survey and profile monitoring of the eastern coast of Wanning, Hainan, the status quo and causes of coastal erosion in this area are analyzed. The east coast of Wanning is generally threatened with erosion. The specific erosion phenomena include the frequent occurrence of erosion scarps, the narrowing of the beach, the low erosion of the beach, the erosion of the beach surface by breeding drainage and the erosion of the shelterbelt. According to the severity of erosion, the types of erosion are divided into three types: periodic erosion, continuous erosion and steep cliff erosion. The most serious erosion is steep cliffs, followed by persistent erosion and the lightest periodic erosion. The causes of erosion can be divided into two aspects, natural and man-made. Natural factors include coastal motive force, typhoon and storm surges, and sea level rise. Human factors include the construction of ponds, deforestation, titanium-zirconium sand mining and foreshore sand mining Wait. Although natural factors play a very important role in the history of coastal erosion, human factors are the main reason for recent coastal erosion.