GIS-based Analysis on Evolutional Process and Stability of Meimaosha Shoal in the Changjiang River Estuary

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  • 1. Tianjin Research Institute of Water Transport Engineering Key Laboratory of Engineening Sediment of Ministry of Communications, Tianjin Research Institute of Water Transport Engineering, Tianjin 300456;
    2. State Key Laboratory of Estuarine and Coastal Research, East China Normal University, Shanghai 200062;
    3. The Second Institute of Oceanography, Hangzhou, Zhejiang 310012

Received date: 2006-04-13

  Revised date: 2006-08-11

  Online published: 2007-09-20

Abstract

Making clear the evolutional process of Meimaosha shoal in the Changjiang(Yangtze) River estuary can provide scientific basis for the construction of a reservoir between the sand ridge and the river bank.Supported by GIS software,15 pieces of charts of the Meimaosha shoal of the South Passage of the Changjiang River etuary were studied.The formation history and evolutional process of the Meimaosha shoal were discussed by the multi-methods.The results showed that,the form and growth of the Meimaosha shoal had undergone three phases which are erosion of local beach,growth of spit and form of sand ridge;the Meimaosha shoal had the character of tidal sand ridge as its middle axes had taken on a good stability along northwest to southeast under the action of steady and driving flood and ebb tides in the passed half century.After 1959,the deposition and erosion of sediment changed very slightly.The volume of 0m sand body change basic invariable,sand body of-2m had been slightly washed out with the erosion rate of 0.07?106m3/a,reflecting the Meimaosha shoal stability is quite good.

Cite this article

ZUO Shu-Hua, LI Jiu-Fa, SHI Lian-Qiang, YING Ming, XU Hai-Gen . GIS-based Analysis on Evolutional Process and Stability of Meimaosha Shoal in the Changjiang River Estuary[J]. SCIENTIA GEOGRAPHICA SINICA, 2007 , 27(5) : 701 -706 . DOI: 10.13249/j.cnki.sgs.2007.05.701

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