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中国沙漠  2019, Vol. 39 Issue (3): 191-198    DOI: 10.7522/j.issn.1000-694X.2019.00036
    
额济纳旗典型地表沙尘释放潜力及沙尘天气频发成因
李宽1,2, 贾晓鹏3, 熊鑫1, 王海兵1, 李钢铁1
1. 内蒙古农业大学 沙漠治理学院/内蒙古风沙物理与防沙治沙工程重点实验室, 内蒙古 呼和浩特 010011;
2. 内蒙古自治区土地调查规划院, 内蒙古 呼和浩特 010011;
3. 中国科学院西北生态环境资源研究院 沙漠与沙漠化重点实验室, 甘肃 兰州 730000
Potential of Dust Emission and Causes of Frequent Sandstorm Activities in Ejina Banner, Inner Mongolia, China
Li Kuan1,2, Jia Xiaopeng3, Xiong Xin1, Wang Haibing1, Li Gangtie1
1. Desert Science and Engineering College/Key Laboratory of Aeolian Sand Physics and Sand Control Engineering in Inner Mongolia, Inner Mongolia Agricultural University, Hohhot 010011, China;
2. Inner Mongolia Land Surveying and Planning Institute, Hohhot 010011, China;
3. Key Laboratory of Desert and Desertification, Northwest Institute of Eco-Environmental and Resources, Chinese Academy of Sciences, Lanzhou 730000, China
 全文: PDF(6145 KB)  
摘要: 额济纳旗位于极端干旱的内陆河下游,绿洲退化严重,沙尘天气频发,已成为内蒙古西部主要沙尘源区。为揭示该区域沙尘频繁成因,对区域4种典型地表(富沙砾戈壁、富沙戈壁、绿洲退化地、绿洲)沉积物组分、风蚀强度、沙尘释放强度、多年平均月沙尘日数及大风日数等进行了综合分析。结果表明:以风沙活动为主要特征的绿洲退化地,粉沙黏土组分含量高,PM10沙尘释放强度大(0.2796 kg·d-1·m-2),为研究区强沙尘释放地表;富沙及富沙砾戈壁地表,风蚀强度大,但粉沙黏土组分含量低,PM10沙尘释放强度较大(0.1267 kg·d-1·m-2,0.0672 kg·d-1·m-2);尽管绿洲地表粉沙黏土组分含量高,但由于植被、水分等因素的制约,其PM10沙尘释放强度最小(0.0240 kg·d-1·m-2)。额济纳旗绿洲被大面积强沙尘释放源(绿洲退化地和戈壁)包围,局地沙尘内循环过程中粉尘颗粒的富积,为当地高频沙尘天气提供了丰富的尘源,这是额济纳旗沙尘天气频发的主要原因。
关键词: 风蚀强度沙尘释放典型地表额济纳旗    
Abstract: Ejina Banner, located in the downstream of Heihe River in extreme arid areas with serious oasis degradation and frequent sandstorm, is one of the dust emission areas in the west of Inner Mongolia of China. Data on sediment components from four types of typical surface area (sand gravel gobi, sand-rich gobi, degraded oasis, and oasis), intensity of wind erosion and dust emission, average days of dust and wind was comprehensively analyzed to reveal causes of frequent sandstorm activities in this region. The results showed that degraded oasis is the high dust emission areas with high content of clay components and PM10 dust emission intensity (0.2796 kg·d-1·m-2). The gobi with the surface of sand-rich and sand gravel is a weak dust emission area which showed strong wind-induced erosions with low content of silt clay and low PM10 dust emission intensity (0.1267 kg·d-1·m-2 and 0.0672 kg·d-1·m-2). Although the oasis surface is rich in clay components, the PM10 dust emission is weak (0.0240 kg·d-1·m-2) due to the influence of vegetation and soil moisture. Therefore, the strong sandstorm activity in Ejina Banner is due to its geographic location surrounded by large areas of degraded oasis and gobi as well as possible internal dust circulation process locally.
Key words: wind erosion intensity    dust emission    typical surface    Ejina Banner
收稿日期: 2019-03-16 出版日期: 2019-06-10
:  X169  
基金资助: 国家自然科学基金项目(41861001);内蒙古农业大学人才项目(NDYB2017-3)
通讯作者: 李钢铁(E-mail:gangtieli2007@163.com)     E-mail: gangtieli2007@163.com
作者简介: 李宽(1981-),男,内蒙古呼和浩特人,博士研究生,主要从事水土保持与荒漠化防治研究。E-mail:nmlikuan@126.com
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引用本文:

李宽, 贾晓鹏, 熊鑫, 王海兵, 李钢铁. 额济纳旗典型地表沙尘释放潜力及沙尘天气频发成因[J]. 中国沙漠, 2019, 39(3): 191-198.

Li Kuan, Jia Xiaopeng, Xiong Xin, Wang Haibing, Li Gangtie. Potential of Dust Emission and Causes of Frequent Sandstorm Activities in Ejina Banner, Inner Mongolia, China. Journal of Desert Research, 2019, 39(3): 191-198.

链接本文:

http://www.desert.ac.cn/CN/10.7522/j.issn.1000-694X.2019.00036        http://www.desert.ac.cn/CN/Y2019/V39/I3/191

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