曹妃甸地区潮间带演变的遥感监测

摘要

By choosing seven scenes' remote sensing data of American Landsat and CBERS, HJ-1 from 1981 to 2011 and tide and sea level data, and applying the method of “same sea level contrasting” , the paper analyzed and studied the spatial distribution of tidal zone and the dynamic evolution trend of tidal flat in Caofeidian. The results indicated that in the past thirty years, shape of tidal zone had changed greatly because it was affected by human activities such as the tidal flat reclamation and sea reclamation. The upper bound of tidal zone advanced seaward gradually with about 3 km of maximum distance, which made the upper part of tidal flat area reduced constantly. Meanwhile, affected by the sediment runoff decrease, storm washing, subsidence and sea level rise, the lower part of tidal flat was eroded overall, and the west part was gentle, and the east part was more severe. In addition, the balance of tidal flat was broken during the large-scale exploitation and construction in this area, and the tidal flat deposited temporarily in some coasts.%选用美国Landsat系列卫星、中巴卫星CBERS及中国HJ-1卫星1981-2011年7个时相的遥感数据及潮汐潮位资料，应用“相同潮位对比法”，分析研究了曹妃甸地区潮间带的空间分布特征和潮滩动态演变趋势。结果表明：近三十年来，受潮滩围垦、填海造陆等人类活动的影响，潮间带形态发生了很大变化，潮间带上边界逐渐向海推进，最大推进距离达3 km左右，使得上部潮滩面积不断减少；同时，受输沙量减少、风浪冲刷、沉降作用及海平面上升等因素的综合影响，潮滩下部整体上处于侵蚀状态，西部滩面侵蚀较轻，东部滩面侵蚀较严重。另外，在该区大规模开发建设期间，潮滩的平衡状态被破坏，部分岸段出现了潮滩暂时淤高的现象。