Journal of Geographical Sciences ›› 2005, Vol. 15 ›› Issue (2): 155-166.doi: 10.1360/gs050202

• Climate and Environmental Change • Previous Articles     Next Articles

The application of Yangtze Estuary Tidal Wetlands Geographic Information System

WANG Jun1, CHEN Zhenlou1, XU Shiyuan2, WANG Dongqi1, LIU Jie1   

  1. 1. Key Laboratory of Geo-information Science of the Ministry of Education, East China Normal University, Shanghai 200062, China;

    2. State Key Laboratory of Estuarine and Coastal Research,East China Normal University, Shanghai 200062, China
  • Received:2004-11-02 Revised:2005-01-26 Online:2005-06-25 Published:2005-06-25
  • Supported by:

    National Natural Science Foundation of China, No.40131020; No.40173030; Shanghai Science Committee and Environmental Bureau Program; Shanghai Basic Science Research Key Program, No.02DJ14029; Foundation for the Excellent Youth Teacher by the Ministry of Education


Yangtze Estuary Tidal Wetlands Geographic Information System (YETWGIS) is a comprehensive software system for environmental management and decision of Yangtze estuary tidal wetlands. Based on MapObjects components technology, Data Mining technology, mathematical modeling method and Visual Basic language, this software system has many functions such as displaying, editing, querying and searching, spatial statistics and analysis, thematic map compiling, and environmental quality evaluation. This paper firstly outlined the system structure, key techniques, and achieving methods of YETWGIS, and then, described the core modules (the thematic map compiling module and environmental quality evaluation model module) in detail. In addition, based on information entropy model, it thoroughly discussed the methods of environmental quality evaluation and indicators' weight calculation. Finally, by using YETWGIS, this paper analyzed the spatial distribution characteristics of Heavy Metal and Persistent Organic Pollutants (POPs) of the Yangtze estuary tidal wetlands in 2002, and evaluated the environmental quality of the Yangtze estuary tidal wetlands in 2003.

Key words: Yangtze estuary, tidal wetland, geographic information system, components technology, information entropy model