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林业资源管理 ›› 2018›› Issue (1): 63-71.doi: 10.13466/j.cnki.lyzygl.2018.01.010

• 科学研究 • 上一篇    下一篇

库布齐沙漠中段沙化土地动态变化及驱动力分析

王翠萍()   

  1. 国家林业局西北林业调查规划设计院,西安 710048
  • 收稿日期:2017-11-27 修回日期:2017-12-21 出版日期:2018-02-28 发布日期:2020-09-27
  • 作者简介:王翠萍(1982-),女,甘肃兰州人,工程师,硕士,主要从事沙化土地监测与防沙治沙政策措施的研究。Email:365176377@qq.com

Analysis on Dynamic Change of Desertification Land and Driving Forces in the Middle Area of Kubuqi Desert

WANG Cuiping()   

  1. Northwest Institute of Forest Inventory,Planning and Design,State Forestry Administration,Xi'an,Shaanxi 710048,China
  • Received:2017-11-27 Revised:2017-12-21 Online:2018-02-28 Published:2020-09-27

摘要:

以2003,2008和2014年3期遥感影像为信息源,利用遥感判读和地面调查相结合的方法,结合区域自然、气候、生态工程建设等资料,获得2003—2014年来库布齐沙漠中段沙化土地变化数据,从沙化土地分布及面积变化、时空动态变化以及驱动力等方面对沙化土地动态变化及成因进行分析研究。结果表明:研究区近10多年来土地沙化的发展势头得到遏制,沙化土地面积年均减少126hm2,总体表现为“整体遏制、持续缩减”的态势,区域沙漠化程度指数从2003年的0.568下降到2014年的0.504。2003—2008年沙化土地综合动态度为0.74%,2008—2014年沙化土地综合动态度增加到3.00%,说明研究区沙化土地处于极缓慢变化状态,但是缓慢变化的速率在加快。沙化土地动态变化驱动力以人为因素为主,防沙治沙措施和生态建设工程是减缓和遏制土地沙化的主要动力。

关键词: 库布齐沙漠, 沙漠化, 沙化土地, 动态变化, 驱动力

Abstract:

Based on images in 2003,2008 and 2014,adopting remote sensing interpretation and the field investigation of landcover,combined with local climate,ecological engineering and other relative information,we analyzed the distribution of desertification land and dynamic changes in the middle area of the Kubuqi desert and tried to find the causes of the change.The results showed that:the aggravating trend of desertification is restrained and the area of desertification land is reduced by an average of 126 hectares in the study area in recent 10 years.The desertification degree index decreased from 0.568 in 2003 to 0.504 in 2014.The comprehensive dynamic degree of desertification land was 0.74% in 2003—2008 and increased to 3% in 2008—2014.That state of desertification land belongs to a slow change in the study area,but slow change rate in speed.Human factors were the main driving force on the dynamic change of desertification land.The measures of sand prevention and ecological construction were the major driving force to slow down and restrain land desertification.

Key words: Kubuqi Desert, desertification, desertification land, dynamic change, driving forces

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