干旱内陆河尾闾绿洲土地利用动态变化研究——以金塔绿洲为例

Oasis Land Use Dynamic Change in Arid Inland River Basin

以我国西北干旱内陆河尾闾的金塔绿洲为例，利用遥感和GIS技术，分析和评价近15年（1988—2003年）来该绿洲土地利用的动态变化及其对整个绿洲环境的影响。研究结果表明，1988～2003年金塔绿洲耕地、城市建筑用地和未利用土地显著增加，其中耕地面积增加了30．03km^2，城市建筑用地扩大了13．35km^2，未利用土地面积扩大了15．52km^2；而草地和林地面积急速下降，分别减少了58．06和1．76km^2。造成了整个绿洲诸如土地荒漠化、地下水位的下降等生态环境退化问题。

Jinta Oasis, a typical oasis of temperate arid zone in northwestern China, was investigated to assess land-use change dynamics during 1988 - 2003 with the aid of satellite remote sensing and GIS, and to explore the interaction between these changes and oasis environment. The results indicated that cropland, urban built-up land, and barren land increased greatly by 30.03, 13.35, and 15.52 km^2 , respectively ; but grassland and forestland areas decreased rapidly by 58.06, and 1.76 km^2, respectively, which resulted in severe problems of environmental degradation, namely land desertification, decline of groundwater, and vegetation degeneracy and etc.