Acta Geographica Sinica ›› 2010, Vol. 65 ›› Issue (9): 1130-1136.doi: 10.11821/xb201009010

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Coastline Changes in Yancheng since 6000 Years Ago Based on Remote Sensing Image Dodging

KANG Yanyan1,2, DING Xianrong1,2, CHENG Ligang1,2, ZHANG Jing1,2   

  1. 1. State Key Laboratory of Hydrology-Water Resource and Hydraulic Engineering, Nanjing 210098, China;
    2. School of Earth Science and Engineering, Hohai University, Nanjing 210098, China
  • Received:2010-06-08 Revised:2010-07-14 Online:2010-09-20 Published:2010-09-20
  • Supported by:

    Foundation: Jiangsu Offshore Investigation and Assessment, No.JS-908-01-02]

Abstract:

This paper studies the evolution process of coastline in the Yancheng coastal plain. First, image dodging and threshold segmentation are carried out based on the 1975 MSS image. So the "zebra-stripe" image has been obtained which reveals the evolution of ancient coast. And then, bottom characteristics samples are analyzed. The result shows that sandy soil and silt soil present alternating distribution in the Yancheng coastal plain. The distribution is compatible with the "zebra-stripe" image. In addition, the overall trends of the historical coastline and the stripes of the interpretation map is the same. To sum up, the "zebra-stripe" should be the indicator of the coastline change. A total of 10 sand hills and 10 silt flats are found in the "zebra-stripe" image. Therefore we get a better understanding of the coastal evolution in the Yancheng coastal plain.

Key words: remote sensing image dodging, sand hills and silt flats, ancient coast, Yancheng, coastal plain