| 摘要: |
| 为了更有效地研究珠海市海岸带海岸线的变化, 基于2005年、2010年和2015年3期覆盖珠海市海岸带的高分辨率SPOT-5、GF-1和航空DOM遥感影像, 建立了珠海海岸带岸线分类体系, 并采用人机交互方式提取了3期12类海岸线信息。对海岸线长度及海岸蚀淤情况进行分析, 结果表明: (1)2005～2015年珠海市海岸带海岸线总体长度从470.69 km增长到496.95 km, 年平均增长2.38 km; (2)2005～2015年珠海市海岸带岸线中, 人工岸线一直占较大比重, 且10年间呈持续增长状态, 总长度增长了40.21 km, 而此期间的自然岸线却减少了13.95 km; (3)珠海市海岸带侵蚀面积为0.98 km2, 扩张面积为34.75 km2。港口码头和建设岸线是扩张主因, 养殖围堤岸线、砾石岸线、基岩岸线长度逐年递减并向内陆侵蚀; (4)珠海市高栏港区附近岸线变化最为剧烈, 实地调查发现该地区港口从2008年开始建设并逐年向外扩张, 至2015年扩张面积为27.65 km2, 平均扩张速率为3.4 km2/a。通过以上分析,可以得出近10年珠海市海岸带海岸线变迁是海岸开发所引起的, 港口码头建设是人类开发海岸的主要方式。 |
| 关键词: 海岸线 珠海 高分影像 变迁分析 蚀淤分析 |
| DOI：10.11759/hykx20160902001 |
| 分类号: |
| 基金项目:国家高分重大专项; 中央级公益性专项(2015T03) |
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| Remote sensing analyses of the spatial and temporal changes in Zhuhai shoreline |
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YANG Lei,SUN Wei-fu,MA Yi,REN Guang-bo
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| Abstract: |
| In this paper, a classification system for Zhuhai coastal shoreline was created to study the change in the coastal zones in Zhuhai based on high resolution remote sensing images obtained from the SPOT5, GF-1, and aerial DOM. The 3 phase information for 12 kinds of coastlines was extracted by human-computer interactions, and the length of the coastline and the erosion and deposition of the two aspects were analyzed in detail. The results were as follows: (1)The overall length of the coastline of Zhuhai city increased from 470.69 km to 496.95 km in 10 years, and the average annual growth was 2.38 km. (2)During the period of 2005—2015, the artificial shoreline had a larger proportion, and it underwent continuous development in the recent 10 years. The length of artificial shoreline increased to 40.21 km, whereas the length of natural shoreline reduced to 13.95 km. (2)The erosion area of Zhuhai is 0.98 km2, and the deposition area is 34.75 km2 in these 10 years. The shorelines which expand to the sea are mainly in the port and construction areas. The length of the coastline including aquaculture ponds, gravel shorelines, and rock shorelines has decreased, and the migratory direction of these shorelines is mainly toward the inland. (4)The past 10 years have witnessed a severe change in the Gaolan Port. According to the fieldwork in the Gaolan Port, the port was constructed and expanded toward the sea in 2008. The expansion area reached 27.65 km2 by 2015, and the average expansion rate was 3.4 km2/a. Port construction is the main expansion type in this area. Through the above analysis, it can be concluded that the coastline change of the coastal zone of Zhuhai in the recent is caused by coastal development. |
| Key words: shoreline Zhuhai high resolution images change analysis erosion and deposition analysis |
