RESOURCES AND ENVIRONMENT IN THE YANGTZE BASIN >> 2010, Vol. 19 >> Issue (2): 152-.

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RESEARCH ON EXTRACTING COASTAL WETLANDS WATER INFORMATION USING COMPOSITION CIWI WATER INDEX

LING Chengxing1,2, ZHANG Huaiqing1, LIN Hui2   

  1. (1.Institute of Forest Resource Information Techniques, Chinese Academy of Forestry, Beijing 100091, China|2.Research Center of Forest Remote Sensing &|Information Engineering,Central South University of Forestry and Technology, Changsha 410004, China)
  • Online:2010-02-20

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Abstract:

According to the spectrum analysis and background information on the reflect characteristics of coastal wetland region,this paper firstly used the CIWI water index on the Coastal wetlands' TM Images,and compared with the main methods of extracting water information,especially the extensive application waters indices:NDWI,MNDWI.It was proved that CIWI has the higher extracting level of difference between water,vegetation and town than NDWI and MNDWI.The data of the difference level were 505%(water & vegetation),292%(water & town)  and 267%( vegetation & town).CIWI water index is an accurate and fast method to extracting the coastal wetland water information in the research area of Yancheng city,Jiangsu Province.The precision achieved 949%.

Key words: coastal wetlands/ water index/ CIWI/ remote sensing (RS)

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