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中国沙漠 ›› 2022, Vol. 42 ›› Issue (4): 50-59.DOI: 10.7522/j.issn.1000-694X.2021.00202

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吉兰泰盐湖防护体系阻沙效应及输沙粒度特征

管雪薇1,2(), 杨采怡1, 刘广明2(), 汪季3, 肖蒙1, 丁延龙4, 陈金林1()   

  1. 1.南京林业大学 南方现代林业协同创新中心,江苏 南京 210037
    2.中国科学院南京土壤研究所,江苏 南京 210008
    3.内蒙古农业大学 沙漠治理学院,内蒙古 呼和浩特 010019
    4.内蒙古财经大学 旅游学院,内蒙古 呼和浩特 010070
  • 收稿日期:2021-10-11 修回日期:2021-11-25 出版日期:2022-07-20 发布日期:2022-08-29
  • 通讯作者: 刘广明,陈金林
  • 作者简介:陈金林(E-mail: jlchen@njfu.edu.cn
    刘广明(E-mail: gmliu@issas.ac.cn
    管雪薇(1996—),女,山西大同人,博士研究生,主要从事土壤改良与利用研究。E-mail: guanxuewei1996@163.com
  • 基金资助:
    新疆生产建设兵团科技攻关项目(2019AB038);江苏高校优势学科建设工程项目

Sand blocking effect and grain size characteristics of Jilantai Salt Lake protection system

Xuewei Guan1,2(), Caiyi Yang1, Guangming Liu2(), Ji Wang3, Meng Xiao1, Yanlong Ding4, Jinlin Chen1()   

  1. 1.Co -Innovation Center for Sustainable Forestry in Southern China,Nanjing Forestry University,Nanjing 210037,China
    2.Institute of Soil Science,Chinese Academy of Sciences,Nanjing 210008,China
    3.Desert Science and Engineering College,Inner Mongolia Agricultural University,Hohhot 010019,China
    4.College of Tourism,Inner Mongolia University of Finance and Economics,Hohhot 010070,China
  • Received:2021-10-11 Revised:2021-11-25 Online:2022-07-20 Published:2022-08-29
  • Contact: Guangming Liu,Jinlin Chen

摘要:

风沙危害是制约荒漠盐碱湖区资源开采的重要因素,研究盐湖防护体系风沙运移规律及其颗粒运动方式对实现盐湖资源可持续开采具有重要意义。以吉兰泰盐湖防护体系为研究对象,通过野外定位监测结合室内分析的方法,逐月对防护体系不同部位输沙通量进行观测,探究吉兰泰盐湖防护体系沙粒运动方式及各月输沙通量变化规律,以期为吉兰泰盐湖防护体系效果评估提供数据支撑。结果表明:(1)从流动沙垄至盐湖湖心风速表现为先减小后增加的趋势,除白刺灌丛外,其余样地风速基本不受风向影响。(2)除防护林带外,季节变化对防护体系50 cm高度以上输沙通量影响较大。(3)防护体系各样地0—40 cm高度的输沙通量占总输沙通量的53.43%—96.63%,区域内沙粒运动方式以跃移为主。(4)从流动沙垄至盐湖湖心,沙物质粒径分布曲线整体呈双峰型,且沙物质颗粒粒径表现为先增大,至盐碱滩地时达到最大,后略减小的趋势。吉兰泰盐湖防护体系50 cm高度以上输沙通量受季节影响较大,但整体仍可拦截95.79%—99.93%的沙粒,从而有效避免盐湖湖面积沙。

关键词: 输沙通量, 阻沙效应, 防护体系, 吉兰泰盐湖

Abstract:

Wind-blown sand hazard is one of the important factors restricting the exploitation of resources in desert saline-alkali lake region. It is of great significance to study how to prevent and control the wind-blown sand hazard by protective effect in this region to realize the sustainable exploitation of salt lake resources. Therefore, this study takes the protection system of Jilantai Salt Lake as the research object. Through the method of field positioning monitoring and indoor analysis, the monthly sediment flux at different parts of the protection system is observed to explore the sand movement mode of the protection system of Jilantai Salt Lake and the variation law of monthly sediment flux, so as to provide data support for the effect evaluation of the protection system of Jilantai Salt Lake. The results showed that: (1) The wind speed from the mobile sand ridge to the center of the salt lake showed a trend of first decreasing and then increasing. In addition to the white thorn shrub, the wind speed of the plots was basically not affected by the wind direction. (2) Seasonal variation has a great influence on the sediment flux above 50cm height of the protection system except the shelterbelt. (3) During the observation period, the sediment transport flux in the 0-40 cm height range of the protection system accounted for 53.43%-96.63% of the total sediment transport flux, and the sand movement in the region was mainly dominated by jump. (4) From the flowing sand ridge to the center of salt lake, the distribution curve of sand particle size showed a bimodal type, and the sand particle size increased first, and reached the maximum at the saline-alkali beach, and then decreased slightly. In addition to the shelter belt, the sediment transport flux above 50 cm height of Jilantai Salt Lake protection system is greatly affected by the season, but the overall can still intercept 95.79%-99.93% of the sand, so as to effectively avoid the salt lake area.

Key words: sand transport flux, sand blocking effect, protection system, Jilantai Salt Lake

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