摘要
定量分析了西北内陆区生态环境及其总体变化趋势。通过对生态环境现状的总体评价,研究了20世纪70～90年代西北内陆地区发生的景观变化;以335个县级区为基本数据信息单元、省级行政区为分析讨论的基本层面,进行了全西北、省、县3个层次的评价;从水分-植被相互作用机理入手,分析了水资源和土地开发利用对景观改变和生态环境演变趋势的影响;提出了西北内陆干旱区生态环境呈现荒漠化面积扩大、人工绿洲面积扩大而荒漠-绿洲过渡交错带面积缩小,且总体趋于劣化的演变趋势。
Based on the remote sensing data and field survey the ecological landscape and its evolution trend in arid region of northwest China from 1970 to 1990 is assessed. The assessment includes the analysis on three different levels:county, province and total region. The mechanism of the interaction between moisture and vegetation is taken into account and the impact of utilization of water resources and land on variation of landscape and ecological environment is analyzed. It is concluded that the evolution trend of ecological environment in this region is stable. It seems that the areas of artificial oasis and desert are enlarging respectively and the transition zone between oasis and desert is reducing.
出处
《水利学报》
EI
CSCD
北大核心
2004年第8期8-14,共7页
Journal of Hydraulic Engineering
基金
"十五"国家重大科技攻关计划项目(2001BA610A-01
2001BA610A-02)
