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中国沙漠 ›› 2018, Vol. 38 ›› Issue (1): 30-38.DOI: 10.7522/j.issn.1000-694X.2016.00130

• 沙漠与沙漠化 • 上一篇    下一篇

1989-2014年共和盆地贵南县土地沙漠化动态

胡梦珺, 李向锋, 左海玲, 潘宁惠, 冯淑琴   

  1. 西北师范大学 地理与环境科学学院, 甘肃 兰州 730070
  • 收稿日期:2016-09-02 修回日期:2016-09-21 出版日期:2018-01-20 发布日期:2018-01-20
  • 作者简介:胡梦珺(1974-),女,甘肃庆阳人,副教授,博士,主要从事沙区环境演变与流域水文生态方面的研究工作。E-mail:lele200466@163.com
  • 基金资助:
    国家自然科学基金项目(41171018);西北师范大学青-教师科研能力提升计划项目(NWNU-LKON-10-34)

Change of Sandy Desertification Land in Guinan County in Gonghe Basin from 1989 to 2014

Hu Mengjun, Li Xiangfeng, Zuo Hailing, Pan Ninghui, Feng Shuqin   

  1. College of Geography and Environment Science, Northwest Normal University, Lanzhou 730070, China
  • Received:2016-09-02 Revised:2016-09-21 Online:2018-01-20 Published:2018-01-20

摘要: 以6个时期的TM影像为数据源,监测分析了1989-2014年贵南县土地沙漠化时空演变。结果表明:25 a来贵南县土地沙漠化呈现整体逆转、局部发展的态势。就整体而言,1989-2014年沙漠化土地减少了32.0 km2,年均减少率0.91%;就不同类型沙漠化土地来说,极重度沙漠化土地增加28.2 km2,重度、中度、轻度、潜在沙漠化土地均减少,分别减少7.9、17.7、13.8、20.8 km2。贵南县土地沙漠化演化经历了1989-1999年缓慢逆转、1999-2004年快速逆转、2004-2014年缓慢发展3个阶段;虽然沙漠化整体呈现逆转,但极重度沙漠化土地一直增加,且最近10 a贵南县沙漠化土地增加、沙漠化发展增强,沙漠化治理形势依然严峻。

关键词: 共和盆地, 目视解译, 土地沙漠化, 动态演化

Abstract: The landsat remote sensing images in 1989, 1994, 1999, 2004, 2009, 2014 are used to monitor and analyze the spatial-temporal change of sandy desertification land in Guinan County from 1989 to 2014. Results show that the sandy desertification land evolution in Guinan County experience three different phases, which are slow reversion in 1989-1999, fast reversion in 1999-2004, slow development in 2004-2014.The area of sandy desertification land has reduced by 32.0 km2 in the recent 25 years, and the decrease rate is 0.91% each year; for different kinds of sandy desertification land, the area of the extremely serious sandy desertification land increased by 28.2 km2, the other four kinds of sandy desertification land reduced by 60.2 km2 totally. The sandy desertification in Guinan County was in a dynamic change progress, and the sandy desertification land increased in the nearest 10 years.

Key words: Gonghe Basin, visual interpretation, sandy desertification, dynamic evolution

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