Journal of Marine Sciences ›› 2016, Vol. 34 ›› Issue (4): 46-53.DOI: 10.3969/j.issn.1001-909X.2016.04.006

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The rule of temporal and spatial variation and its reasons analysis of coastline in Xiushan Island over the last 50 years

LI Yuan1, SHI Lian-qiang*1, TONG Xiao-ling2, LIAO Tian1   

  1. 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
  • Received:2015-11-23 Revised:2016-03-11 Online:2016-12-15 Published:2022-11-24

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.

Key words: coastline of Xiushan Island, remote sensing, GIS, temporal and spatial variation, DSAS

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