Landscape Pattern Change and Its Driving Forces in Sanjiang Plain from 1976 to 2000

It is of significance to study landscape patterns and their dynamic change. Based on RS and GIS, the dynamic change of landscape pattern in Sanjiang Plain from 1976 to 2000 is quantitatively analyzed with a change matrix and seven landscape indices. The results showed that the spatial pattern in Sanjiang Plain has been significantly changed over the past 24 years. The increasing farmland was due to the conversion from marsh and grassland. The analysis of landscape indices indicated that the landscape tended to fragmentation and irregularity. In a word, the dynamic changes of landscape pattern in Sanjiang Plain were caused by population increase, and the irrational exploitation and utilization of natural resources. The study results can provide the references for optimizing the landscape pattern and conserving the wild plants and animals.