摘要: |
为研究盘锦海岸线的时空变迁,文章基于面向对象的多尺度分割技术,利用局部方差变化率算法计算水域的最优分割尺度,使用隶属度分类得到水边线,通过潮汐改正提取海岸线,系统分析1990-2018年盘锦沿海4个研究区的海岸线长度、变化距离和变化率以及海岸带向海推进面积的时空变化特征及其驱动因素。研究结果表明:4期影像水边线提取的最优分割尺度分别为118、91、114和104;辽河口、临港工业区、盘锦港区和辽滨主城区海岸带向海推进面积分别为99.96 km2、43.96 km2、26.62 km2和26.91 km2;盘锦海岸线的巨大变化主要是由于资源枯竭型城市向海发展、全面转型和以港强市的政策导向作用。 |
关键词: 海岸线 多尺度分割 局部方差变化率 水边线提取 填海造地 |
DOI: |
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基金项目:辽宁省自然科学基金项目“海洋公园生态承载力时空格局及驱动力机制研究” (20180551164) |
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The Spatial and Temporal Changes of Panjin Coastlines Under Optimal Segmentation Scale |
FU Jie,SONG Lun,LEI Liyuan,LI Jingzhong |
Liaoning Ocean and Fisheries Science Research Institute;College of Urban and Environmental Sciences,Xuchang University |
Abstract: |
In order to study the temporal and spatial variation characteristics of Panjin coastlines, this paper used the change rate of local variance to calculate the optimal segmentation scale based on the object-oriented multiresolution segmentation technology, and used the membership classification to obtain the waterline, and then Panjin coastlines were extracted by tidal correction. This paper systematically analyzed the temporal and spatial variation characteristics and driving factors of coastlines length, change distance and change rate, and coastal zone propulsion area in four study areas along Panjin coast from 1990 to 2018. The results showed that the optimal segmentation scales of waterline extraction from the 4 remote sensing images were 118,91,114 and 104. The coastal increased areas towards the sea of Liaohe Estuary, Harbor Industrial Zone, Panjin Port and Liaobin Main City were 99.96 km2, 43.96 km2, 26.62 km2 and 26.91 km2, respectively. The dramatic changes in Panjin′s coastline were mainly due to the development of resource-exhausted cities towards the sea, the comprehensive transformation and the policy-oriented role of a developing city based on port industries. |
Key words: Coastline,Multiresolution segmentation,Change rate of local variance,Extraction of water line,Land reclamation |