Analysis on the Landscape Pattern Change of Wetland in Fujin City of Sanjiang Plain

Wetland is a kind of key natureal resources and is an important environment for human survival. Because of natural and anthropogenic disturbances, wetland has been shrinking in large scale. The function of wetland has been lost. All these endangered the sustanable development of human beings. Taken Naoli River Basin as a case study, the spatio-temperal dynamics of the wetlands in the study area and its driving forces from 1954 to 2000 were analyzed. The results show that the wetland area were reduced from 519 917.96 hm2 in 1954 to 105 008 hm2 in 2000 with the areal percentage reduced from 61.27% to 12.39%. The wetland acreage in 2000 is only 1/4 as much as that in 1954. While arable land acreage increased from 223 173.54 hm2 to 597156.25 hm2. The acreage percentage increased from 25.31% to 70.45%. And the predominant driving force for wetland shrinkage in Naoli River Basin is the reclamation activities by human beings.