新疆艾比湖地区土地沙漠化时空演变及其成因

Spatial and Temporal Changes of Desertification Land and Related Influencing Factors in Ebinur Lake of Xinjiang Uyghur Autonomous Region

基于RS和GIS技术,对1990—2010年艾比湖地区沙漠化动态变化进行了监测。研究表明,艾比湖地区分布着大面积的沙漠化土地,主要分布在其东部和西岸地区。20a间沙漠化土地面积明显减少,沙漠化土地面积从1990年的4 426.49km2减少到2010年的637.33km2,减少了3 789.16km2。经历了强烈逆转—稳定发展—基本稳定3个阶段,1990—2001年沙漠化土地面积从4 426.49km2减少到3 713.2 5km2;2001—2007年沙漠化土地总面积保持基本不变,但沙漠化程度稍有加重;2007—2010年沙漠化土地总面积略微增加,沙漠化程度在持续加深。近20a来沙漠化转变尤为显著,气候变化和不合理的人类活动共同导致了研究区东部的沙漠化程度的加剧。

The distribution of desertification land in Ebinur Lake region in 1990and 2010was monitored by remote sensing and GIS technology.There was a large area of desertification land in Ebinur Lake region and it was mainly distributed in east of study area and the west bank of Ebinur Lake.The decrease of desertification land was obvious from 1990to 2010.The desertification land decreased from 4 426.49km2 in 1990to 3 789.16km2 in 2010,decreased by 3 789.16km2.The study area experienced a development process from strong reverse of desertification to stability and development.From 1990to 2001,the area of desertified land reduced from 4 426.49km2 to 3 713.25km2;from 2001to 2007,the total area of desertified land will remain basically unchanged,but the degree of desertification is slightly higier.In the past 20years,the desertification is particularly serious due to climate change and irrational human activities,and the eastern part of the study area is more serious.