Abstract:

Using the MSS data in 1976, ETM data in 2001 and CBERS data in 2007 as data source, we obtained the wetland data by the way of man-machine interactive interpretation and field checkout. Under the support of GIS technology, the authors analyzed the spatial-temporal change characteristics of wetland by dynamic degree, conversion matrix, landscape pattern index and barycenter excursion in three provinces of Northeast China. The results show that the natural wetland decreased largely, and landscape pattern tend to complication; artificial wetland area increased rapidly, and tend to regularization in the past 30 years. And many marshes have been translated to the artificial breeding-cultivation. Although the natural wetland is a slight increasing under increased rainfall and wetland protection measures recently, the coastal wetland is still degraded.

Key words: remote sensing, geographic information systems (GIS), wetland, dynamic change, three provinces of Northeast China