遥感技术支持下的闽江口湿地动态变化研究

Study on Dynamic Change of Wetland in Minjiang River Estuary Based on Remote Sensing Technology

在遥感技术支持下,利用1986年、1994年和2000年的遥感影像作为数据源,对闽江口湿地信息进行提取,并对湿地动态变化情况进行分析,同时利用生态学中的马尔柯夫模型对该地区的湿地类型转化进行了模拟。结果显示,1986～2000年期间,该地区的湿地呈明显减少趋势,且湿地转移速率变化大。这些数据表明,人类活动对湿地的影响越来越大。

In this research,year 1986,1994,and 2000 remote sensed images are used as data resources.With a support of the remote sensing technology,the wetland information in the area of Minjiang River estuary is extracted through the layered classification approach,and results of the image interpretation are analyzed.To scrutinize the dynamic changes of wetlands,the simulation for transformation of the wetland types in this study has been carried out by means of the ecological Markov Process.The results derived from year 1986 to 2000 imagery show that wetland has an obviously decreasing tendency,and that the transfer velocity of wetland is a remarkable from time to time.These indicate that the human activity has an increasing influence on wetland's changes.