Spatial and temporal dynamic analysis of wetland in Pearl River Estuary during 1988-2004
Rapid land use change has taken place in many coastal regions of China such as the Pearl River Estuary over the past tow decades due to accelerated industrialization and urbanization.In this paper,four temporal Landsat TM images were used at a spatial resolution of 30m to mapping wetlands and monitoring their changes in the Pearl River Estuary for the time period of 1988-2004.Hierarchical classification method based on spectral data,prior knowledge about the study area and GIS ancillary data were used to acquire four temporal wetland distribution maps,and three evaluation indicators (change ratio,change speed,and bidirectional dynamic degree model) were used to analysis the change characteristic of wetlands in the study area.The result indicated that there has been a rapid decrease of wetlands in the study area during 1988-2004.The total area of wetlands has lost about 122.66 km2 in the Pearl River Estuary.
Remote Sensing GIS wetlands change the Pearl River Estuary
Kai Liu Bin Ai Shugong Wang Wanxia Liu
Guangzhou Institute of Geography,Guangzhou,P.R.China,510070 School of Geography and Planning,Sun Yat-sen University,Guangzhou,P.R.China,510275 Institute of Environmental Science,Sun Yat-sen University,Guangzhou,P.R.China,510275
国际会议
第16届国际地理信息科学与技术大会(16th International Conference on GeoInformatics and the Joint Conference)
广州
英文
2008-06-28（万方平台首次上网日期，不代表论文的发表时间）