内蒙古西辽河流域荒漠化分析研究

Research for Desertification Analysis of West Liaohe Riwer Basin of Inner Mongolia

内蒙古西辽河流域生态环境脆弱,土地利用类型复杂多样。近年来,随着社会经济的进一步发展,导致了西辽河流域严重的荒漠化,极大地制约着该区域社会经济的稳定、持续发展。通过利用该区域20世纪80年代末和2000年两期TM影像数据为信息源,在提取两期沙质荒漠化数据的基础上,深入分析了2000年西辽河流域沙质荒漠化状况,同时统计计算了该区十年内各沙质类荒漠化土地之间的转换面积,采用转移矩阵法和数学模型法,建立了20世纪80年代末到2000年沙质荒漠化土地转移矩阵和动态度。结果表明:风蚀荒漠化基本得到了控制,水蚀荒漠化土地增加了近1.5个百分点,盐渍化土地略有减少,但减少幅度不大。

Desertification of west Liaohe River basin became serious in recent years due to fragile ecological en- vironment, abundant land use types and the further development of social economy, which is fearfully con- straining the stability of social economy and sustainable development. By using TM image data in the late 1980rs and 2000 as information sources, based on the data extraction of the two-period sandy desertification, this article has thoroughly analyzed the situation of sandy desertification in west Liaohe River basin. Mean- while, the transformation proportions among different desertification lands over the past ten years were cal- culated. By adopting transfer matrix method and mathematical model method, it presented the transfer ma- trix and dynamic degree of sandy desertification lands in the late 1980＇s and 2000. It turned out that wind e- rosion desertification had been basically brought under control, water erosion desertification lands had in- creased by almost 1.5 % and salinization land had reduced slightly.