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基于遥感和GIS技术的荒漠化动态分析——以宁夏盐池为例

Analysis on Desertification Dynamics based on Remote Sensing and GIS-Exampled in Yanchi County, Ningxia

【作者】 祁元王一谋王建华颜长珍

【Author】 QI Yuan, WANG Yi\|mou, WANG Jian\|hua, YAN Chang\|zhen(Cold and Arid Regions Environmental and Engineering Research Institute, Chinese Academy of Sciences, Lanzhou 730000, China)

【机构】 中国科学院寒区旱区环境与工程研究所中国科学院寒区旱区环境与工程研究所 甘肃兰州 730000甘肃兰州 730000甘肃兰州 730000

【摘要】 荒漠化是当今全球和中国最为严重的环境与社会经济问题之一,它的危害已深入到自然与社会经济的各个方面。选取荒漠化问题突出的宁夏盐池县作为研究区,通过3期遥感TM影像(1986年、1996年、2000年),运用GIS的分析手段,综合土地利用图、地形图和其他资料形成盐池县3期荒漠化现状图及两阶段动态图。盐池荒漠化土地类型的结构变化表明,荒漠化受非荒漠化类型土地限制,其面积有所减小,但程度在加重。荒漠化发展的原因是自然因素与人为因素共同作用的结果。

【Abstract】 Desertification is one of the most serious problems in the world, which deeply damaged the social\|economy and the environment. Desertification in Yanchi County of Ningxia Hui Autonomous Region is notable. Based on TM images in three periods (1986, 1996, 2000), and land\|use map, relief map and other information of Yanchi County, three desertification maps and two dynamic maps are made through the GIS software, ARC/INFO. Supplied by the GIS and database analysis methods, the structure change and the developmental characteristics of desertification in Yanchi are described in detail. Under the limitation of the other non\|desertification lands, the area of desertification in Yanchi became smaller during 1990s, but the grade became higher. The major desertification reasons are unreasonable agricultural practices, heavy livestock grazing and firewood cutting, and the construction of industry and transportation.

【关键词】 荒漠化遥感地理信息系统盐池
【Key words】 desertificationremote sensingGIS
【基金】 中国科学院知识创新工程重大项目(KZCX Y 02 01 04)资助
  • 【文献出处】 中国沙漠 ,Journal of Desert Research , 编辑部邮箱 ,2003年03期
  • 【分类号】X87
  • 【下载频次】592
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