Technology Application |
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A PROGRADING RATE ANALYSIS OF MUD FLAT SEA COAST BASED ON REMOTE SENSING:
A CASE STUDY OF SONGZHUANG SEA COAST IN GANYU COUNTY, JIANGSU PROVINCE |
ZHANG Xiang-Guo, ZHANG Ren-Shun, WANG Yan-Hong, CHEN Hong-Quan, GU Yong |
Institute of Ocean&Coastal Wetland, Nanjing Normal University, Nanjing 210097, China |
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Abstract In this paper, a method called “superposition analysis” is applied to the study area, based on 8 MSS, TM satellite images from 1978~2004. Making use of a series of images, the authors studied the dynamic changes of mud flat and at the same time avoided the difficulty of tidal level rectification. Three approaches were employed to study the prograding dynamic changes of Songzhuang sea coast in Ganyu, namely, the alteration of seawall lines (mostly resulting from voluntary reclamation) built in past years, the expanding process of Spartina alterniflora and salt swamps, and the prograding rate of Linhong estuary. It is shown that this method can avoid the difficulty of tidal level rectification in different periods and reveal the dynamic change and prograding rate.
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Issue Date: 10 September 2009
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