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砂质岸线动态变化较大、不稳定,开展砂质岸线的动态变化监测,分析其动态变化特征及诱因对砂质岸线的保护和开发有着重要作用。基于唐山市1987、2000和2014年landsat影像,开展了唐山市砂质岸线变迁分析研究。结果表明:(1)1987~2000年,主要受来沙量减少、海洋动力的影响,唐山市砂质岸线全面处于侵蚀状态,其中滦河口—浪窝口段的弧形海岸侵蚀最为强烈;(2)2000年以后,由于人类工程建设,人工海岸增加,砂质岸线侵蚀速率有放缓的趋势。随着人类对海岸干预程度的加强,海岸演变趋势也必将更加复杂。本文提出了退养还湿、海滩养护等防止砂质海岸侵蚀的措施。
Sandy shoreline dynamic change is large and unstable, to carry out dynamic changes in sand shoreline monitoring, analysis of its dynamic characteristics and incentives on the protection and development of sand shoreline plays an important role. Based on Tangshan 1987, 2000 and 2014 landsat images, the analysis of the change of sandy shoreline in Tangshan was carried out. The results show that: (1) During 1987 ~ 2000, the sandy coastline of Tangshan is in a state of erosion, mainly due to the decrease of sediment yield and the influence of ocean power. The arc coast of Luanhekou-Langweikou section is the most intense. (2) After 2000, due to the construction of human engineering and the increase of artificial coast, the erosion rate of sandy shoreline tends to slow down. As humankind’s intervention in coastal areas intensifies, the trend of coastal evolution will certainly be more complicated. In this paper, we put forward some measures to prevent sandy coast erosion, such as recuperation and wetting and beach maintenance.