| 近50 a来秀山岛岸线时空变化规律及其原因浅析 |
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| 引用本文： | 李源,时连强,童宵岭,廖甜.近50 a来秀山岛岸线时空变化规律及其原因浅析[J].海洋学研究,2016,34(4):46-53. |
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| 作者姓名： | 李源 时连强 童宵岭 廖甜 |
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| 作者单位： | 1.国家海洋局 第二海洋研究所 国家海岛开发与管理研究中心,浙江 杭州 310012;2.浙江大学 海洋科学与工程学系,浙江 舟山 316021 |
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| 基金项目： | 国家海洋公益性行业科研专项项目资助(201405037);中央级公益性科研院所基本科研业务费专项资金项目资助(JT1303) |
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| 摘 要： | 海岸线是十分重要的自然资源,海岸线的变化会影响生态平衡与人们的生活。本文以浙江省秀山岛1970、1980、2003、2008和2014年的遥感影像作为数据源,利用遥感和GIS技术方法,并采用DSAS的岸线分析方法揭示了秀山岛近50 a来岸线的时空变化规律。结果表明:在自然和人为的双重因素影响下,秀山岛的自然岸线和人工岸线发生大规模的变化,岸线长度总体上是减少的,共减少4 226 m,新增陆域面积2.491 km2;其中人工岸线减少了4 046 m,海塘面积增加1.971 km2,表现为大规模的向海推进,时空变化显著;自然岸线减少了214 m,主要是沙质岸线和淤泥质岸线的变化,整体表现为岸线小规模的后退,但是局部地区有向海推进的现象。
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| 关 键 词： | 秀山岛岸线 遥感 GIS 时空变化 DSAS |
| 收稿时间： | 2015-11-23 |
The rule of temporal and spatial variation and its reasons analysis of coastline in Xiushan Island over the last 50 years |
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| LI Yuan,SHI Lian-qiang,TONG Xiao-ling,LIAO Tian.The rule of temporal and spatial variation and its reasons analysis of coastline in Xiushan Island over the last 50 years[J].Journal of Marine Sciences,2016,34(4):46-53. |
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| Authors: | LI Yuan SHI Lian-qiang TONG Xiao-ling LIAO Tian |
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| Affiliation: | 1. State Research Center for Island Exploitation and Management, Second Institute of Oceanography,SOA,Hangzhou 310012,China;2. Department of Ocean Science and Engineering,Zhejiang University,Zhoushan 316021,China |
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| Abstract: | Coastline is important natural resource,the change of coastline may affect the ecological balance and people's life. the remote sensing images of the Xiushan Island of Zhejiang Province in 1970,1980,2003,2008 and 2014 were taken as data resource,while the remote sensing and GIS technology,especially DSAS shoreline analysis method were used to reveal the temporal and spatial variation of shoreline of Xiushan Island over the past 50 years. The results show that a large-scale shoreline change of natural coastline and artificial coastline have taken place in Xiushan Island under the double factors of natural and artificial influence. In general, the coastlines have been reduced, and the overall reduced value is 4 226 m, and 2.491 km2 new land area has been created. The artificial coastline has been reduced 4 046 m, the seawall area has been created 1.971 km2. Characterized by massive advance to the sea,spatial and temporal changes are significant. The natural coastline has been reduced 214 m,mainly because of the change of sandy coast and muddy coast. In general, the natural coastline appears a small-scale retreat,but in some places, the coastline appears advancing to the sea. |
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| Keywords: | coastline of Xiushan Island remote sensing GIS temporal and spatial variation DSAS |
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