| 本文已被：浏览 1782次 下载 2460次 |
码上扫一扫！ |
|
|
| 近三十年来曹妃甸岸线岛体时空演变特征分析 |
|
田海兰1, 刘西汉1, 王 红2,3, 石雅君2, 李庆辰1, 王艳霞1
|
|
1.河北省科学院 地理科学研究所;2.中国科学院 烟台海岸带研究所 中国科学院和山东省海岸带环境过程重点实验室;3.河北师范大学 资源与环境科学学院, 河北省环境演变与生态建设省级重点实验室,
|
|
| 摘要: |
| 在对1979 年、1987 年、1991 年、1997 年、2002 年-2005 年、2008 年、2012 年十个时期曹妃甸遥感影像图解译的基础上, 从自然地理学角度对岸线和岛体历史演变趋势进行系统分析, 得到曹妃甸岸线和岛体动态变化。研究结果显示, 曹妃甸岛体面积在近半个世纪发生了较大的变化, 由0.34 km2增加为227.34 km2; 岸线整体表现为向海推进, 1979 年曹妃甸陆域岸线25.21%为自然岸线, 之后自然岸线比例逐渐减少, 自2002 年起人工岸线占据了曹妃甸陆域岸线的全部, 2012 年岛体整体人工岸线长度较1989 年自然岸线增长10 倍之多; 岛体在自然演变时期呈现中部侵蚀、两端淤积、端点延长、西向漂移且中心点逐步向大陆靠拢的变化特征, 自2005 年起自然状态岛体已不复存在。 |
| 关键词: 曹妃甸 岸线演变 岛体演变 折剪速率法 演变速率 |
| DOI：10.11759/hykx20140616001 |
| 分类号: |
| 基金项目:中国科学院院地合作项目—“河北省海岸带受损生态系统评估及修复技术研究”(13001001); 河北省科技计划项目(13273308) |
|
| Spatiotemporal change characteristics of Caofeidian shoreline and island in the past three decades |
|
|
| Abstract: |
| Based upon Caofeidian remote sensing image interpretation in 1979, 1987, 1991, 1997, 2002, 2003, 2004, 2005, 2008 and 2012, it interprets shoreline and island historical changes and future trends from the physical geography point of view, so we get the dynamic change of Caofeidian shoreline and island. The analysis showed that there has been a dramatic shift in Caofeidian during the past half century with area increasing from 0.34 to 227.34 km2. The main trend of shoreline changes is moving seaward slowly. In 1979, 25.21% of shoreline was natural coastline in caofeidian, after that the proportion of natural coastline gradually reduced. Artificial coast accounted for the whole shorelines since 2002 in Caofeidian. The growth of artificial coastline is ten times more in 2012 than natural coastline in 1979. The change of island is proved to be middle erosion, siltation at both sides, endpoint extending, western drifting and the central point becoming closer gradually to the land in the natural evolution period. The natural state of Caofeidian does not exist any more. |
| Key words: Caofeidian coastline evolution, island evolution Jackknife rate evolution rate |