Research on Dynamic Change Pattern of the Minjiang River Estuary Wetland by Remote Sensing and GIS

The dynamic change measurement, transferring matrix of the dynamic change, and its spatial distribution indication of the landscape in Minjiang River Estuary wetland are critical issues for study on the dynamic change pattern of the wetland in different periods of time. Classification and information extraction of the wetlands in the present research are resulted from the remote sensed TM imagery in the imaging years of 1986, 1994 and 2000 respectively. In this paper, dynamic change for each classified type of wetlands is measured in terms of area; transferring matrix of the dynamic changes is formulated and model of transferring probability based on it is established; and applying the fragmentation index, mean landscape fractal dimension, and landscape diversity index, the spatial distribution structure of the wetlands is figured out. Combining these issues above, the dynamic change process of Minjiang River Estuary wetland has been analyzed for the periods of 1986 to 1994 and 1994 to 2000. The results indicate that the dynamic change pattern of the wetland in two periods are different due to the human activities imposed on it, which is highly associated with the local economic development level from time to time. It comes to conclusion that the wetland conservation plan in Minjiang River Estuary should take into consideration of the human activities affected on it in the progress of urbanization.