摘要
湿地是重要的自然资源,但是由于自然和人为影响,湿地正在大面积的萎缩,导致功能和效益下降,并危及到区域的持续发展。本文以三江平原挠力河流域富锦(市)作为研究区域,以RS、GIS和Fragstats为技术手段,分析了自1954年以来沼泽湿地的空间和时间退缩过程及其驱动力,重建了自1954年以来的土地利用/土地覆被变化过程。结果表明,湿地面积由1954年的519 917．96hm2下降到105 008hm2,由占总面积的61．27％下降到12．39％,仅是原来面积的17．74％;而耕地面积由223 173．54hm2增加到597 156．25hm2,由占总面积的25．31％增加到70．45％。同时指,出人类的农垦活动是富锦沼泽湿地面积退缩的主要原因。
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 hm^2 in 1954 to 105 008 hm^2 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 hm^2 to 597156.25 hm^2. 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.
出处
《地球信息科学》
CSCD
2006年第1期21-25,29,共6页
Geo-information Science
基金
国家自然科学基金项目(No.40371082)资助。
