Characteristics and Influencing Factors of Land Desertification in Kern Oasis Area of Lower Heihe River Basin in Recent 20 Years

MA Jun; LIU Wei; XI Hai-yang; ZHANG Tao; YU Teng-fei; YANG Kai-nian

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Characteristics and Influencing Factors of Land Desertification in Kern Oasis Area of Lower Heihe River Basin in Recent 20 Years

- Characteristics and Influencing Factors of Land Desertification in Kern Oasis Area of Lower Heihe River Basin in Recent 20 Years
- Bulletin of Soiland Water Conservation Vol. 33, Issue 1, Pages: 160-165(2014)
- 作者机构：
  
  1. 中国科学院寒区旱区环境与工程研究所,甘肃,兰州,730000
  2. 额济纳旗林业工作站, 内蒙古额济纳旗,735400
- 作者简介：
- 基金信息：
- DOI：
  CLC：
- Published：2014
- 稿件说明：
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MA Jun, LIU Wei, XI Hai-yang, et al. Characteristics and Influencing Factors of Land Desertification in Kern Oasis Area of Lower Heihe River Basin in Recent 20 Years[J]. Bulletin of Soiland Water Conservation, 2014, 33(1): 160-165.
DOI：

MA Jun, LIU Wei, XI Hai-yang, et al. Characteristics and Influencing Factors of Land Desertification in Kern Oasis Area of Lower Heihe River Basin in Recent 20 Years[J]. Bulletin of Soiland Water Conservation, 2014, 33(1): 160-165. DOI：

摘要

利用遥感影像数据

在GIS的支持下

对近20 a黑河下游核心绿洲区的土地荒漠化特征进行分析。结果表明

研究区的沙漠面积在不断增加

在近20 a里沙漠面积增加约31 km

;2001年盐碱地面积为465.97 km

比1990年增加82.29 km

2002年分水工程实施后

盐碱地面积开始减小

2010年又有所增加;近20 a中

沙地在稳步增加

林草地在持续减少

二者之间的转换较为频繁;在不同的土地覆被类型中

林草地、盐碱地、沙地和水体的变化较大。社会经济和人口因素对研究区土地沙漠化的影响显著

在自然因素的背景下

人为因素对水资源时空分布的影响在短期内决定着研究区绿洲的演变方向。

Abstract

The land desertification characteristics in the kern oasis area of the lower Heihe River basin were analyzed using remote sensing image data with support of GIS technique. The studied results showed that desert area steadily increased in recent 20 years

reaching about 31 km2; saline-alkali land area was 465.97 km2 in 2001

increased by 82.29 km2 compared to 1990; and since the water transfer project was implemented in 2002

the saline-alkali land area started to decrease

but increased again in 2010. In recent 20 years

sandy land area steadily increased

but forest land and grassland area continuously decreased and their inter-conversion was frequent. Among different land cover types

the forest land

grassland

saline-alkali land

sandy land and water bodies varied greatly. Socioeconomic and population factors have a significant influence on the land desertification in the study region. Under the background condition of natural factors

the effects of human factors on the spatial-temporal distribution of water resources decide the evolution direction of the oasis in the study region.

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