四川农业大学学报 ›› 2011, Vol. 29 ›› Issue (02): 168-172.doi: 10.3969/j.issn.1000-2650.2011.02.006

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川西北若尔盖县土地沙化动态变化

李敏蕊1, 张岩1, 卢路1, 左林2, 尹忠东1   

  1. 1. 北京林业大学, 北京 100083;
    2. 四川若尔盖县林业局, 四川 若尔盖 634502
  • 收稿日期:2011-03-29 出版日期:2011-06-30 发布日期:2017-04-11
  • 通讯作者: 张岩(E-mail:zhangyan9@bjfu.edu.cn) E-mail:zhangyan9@bjfu.edu.cn
  • 基金资助:
    若尔盖县林业局承担"四川省级沙化治理试点项目(2007-2009)"

Dynamic Changes of Land Desertification of Ruoergai County in North-west Sichuan

LI Min-rui1, ZHANG Yan1, LU Lu1, ZUO Lin2, YIN Zhong-dong1   

  1. 1. Beijing Forestry University, Beijing 100083, China;
    2. Forestry Bureau of Ruoergai Country in Sichuan, Ruoergai 634502, Sichuan, China
  • Received:2011-03-29 Online:2011-06-30 Published:2017-04-11

摘要: 土地沙化是全球十大环境问题之首,更是我国面临的严重生态环境问题。为准确掌握若尔盖县沙化土地的现状、动态及其防治所需的信息,应用空间分析、转移矩阵和聚类的方法,对2004年和2009年若尔盖县沙化土地调查数据进行分析,系统研究了若尔盖县沙化现状、发展趋势及其沙化土地分类。结果表明,2009年沙化面积为72 569.05 hm2,比2004年增加了24.01%,年增长率为4.8%,新增沙化土地主要分布在县域西北部。但2004年以来,沙化土地治理仍有一定成效,2004-2009年具有沙化逆转趋势的土地面积大于持续沙化的面积。2009年若尔盖沙化土地分为3类,76.58%的沙化土地属于防护区。

关键词: 若尔盖, 土地沙化, 空间变化, 沙化强度, 分类

Abstract: Land desertification is the first of the global top ten environmental problems.It is the most serious eco-environmental problem in China.In order to accurately grasp the status of desert-encroachment land in Ruoergai county and the necessary information for prevention, this paper analyzed the desertification rate, trend and classification based on the survey data in 2004 and 2009.The results show that in 2009 the desert-encroachment area is 72 569.05 hm2, with an increase of 24.01% compared with 2004.Annual growth rate is 4.8%.New desert-encroachment land is mainly distributed in the northwestern county.On the other hand, the desertification control practice achieves some effects from 2004 to 2009, and the land area with persistent desertification is smaller than that with alleviating desertification.Desert-encroachment land in 2009 is divided into three categories, 76.58% of which belong to protection zone.

Key words: the Ruoergai plateau, land desertification, spacial variability, desertification intensity, classification

中图分类号: 

  • K903