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[1]WEI Yajuan,Xie yunHu,DANG Xiaohong,et al.Characteristics and Influencing Factors of Atmospheric Dustfall in Different Protective Function Areas of Jilantai Salt Lake System[J].Research of Soil and Water Conservation,2023,30(05):201-208.[doi:10.13869/j.cnki.rswc.2023.05.027.]

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Characteristics and Influencing Factors of Atmospheric Dustfall in Different Protective Function Areas of Jilantai Salt Lake System

Research of Soil and Water Conservation[ISSN 1005-3409/CN 61-1272/P] Volume: 30 Number of periods: 2023 05 Page number: 201-208 Column: Public date: 2023-08-10

Title:: Characteristics and Influencing Factors of Atmospheric Dustfall in Different Protective Function Areas of Jilantai Salt Lake System

Author(s):: WEI Yajuan^1,2, Xie yunHu¹, DANG Xiaohong^2,3, GUO Jing⁴, Liu Meiping¹, Wu Hao⁵; (1.Department of Resource and Environment, Baotou Normal College, Baotou, Inner Mongolia 014030, China; 2.College of Desert Control Science and Engineering, Inner Mongolia Agricultural University, Hohhot 010018, China; 3.Baotou Forestry and Grassland Bureau, Baotou, Inner Mongolia 010010, China; 4.Inner Mongolia Baotou Steel Rare Earth Steel Plate Co., Ltd., Baotou, Inner Mongolia 014010, China; 5.Meteorological Science Institute of Inner Mongolia, Hohhot 010051, China)

Keywords:: atmospheric dustfall; meteorological factors; salt lake protection system; microclimate effect; sand-fixing plants; Jilantai

CLC:: P425.5⁺5

DOI:: 10.13869/j.cnki.rswc.2023.05.027.

Abstract:: [Objective] The aim of this study is to explore the atmospheric dustfall control effect of the Jilantai salt lake protection system in order to provide a theoretical basis for source and transport mode of atmospheric dust substances in the Jilantai salt lake protection system. [Methods] In this study, 2 m atmospheric dustfall samples were collected from different protection zones(fixing shifting-sand zone, fencing dune for grass recovery zone, preventing wind and stopping sand zone and salt lake protection forest zone)for 1 year using the dustfall cylinder method, and atmospheric dustfall, mechanical composition and its influencing factors were analyzed by using weighing method and laser particle size meter. [Results](1)The atmospheric dustfall of Jilantai salt lake protection system was mainly composed of very fine sand and fine sand. Total contents of very fine sand and fine sand in fixing shifting-sand zone, fencing dune for grass recovery zone, preventing wind and stopping sand zone and salt lake protection forest zone were 88.44%, 96.68%, 75.53%, 77.00% and 68.14%, respectively.(2)Compared with shifting sandy land, atmospheric dustfall in the fixing shifting-sand zone, fencing dune for grass recovery zone, preventing wind and stopping sand zone and salt lake protection forest zone reduced by 22.40%, 53.10%, 48.05% and 24.85%, respectively. The magnitude of dust retention effect in order was: preventing wind and stopping sand zone>salt lake protection forest zone>fencing dune for grass recovery zone>fixing shifting-sand zone>shifting sandy land.(3)The peak period of atmospheric deposition was from March to May; the weaker period of atmospheric deposition was from December to next February; and the weakest period of atmospheric deposition was from June to November. The atmospheric dustfall mainly concentrated in spring and winter, accounting for 77.52%～87.04% of the annual dustfall.(4)Average wind speed, blowing dust days, strong wind days, sandstorm days and rainfall were main meteorological factors affecting the amount of dust-falling amount. Average wind speed, blowing dust days, strong wind days and sandstorm days provided driving conditions for dustfall in salt lake protection system, and the amount of rainfall suppressed the amount of dustfall. [Conclusion] Most of atmospheric dust substances in different protective function areas of Jilantai salt lake system came from local and regional substances, and atmospheric dustfall was jointly determined by comprehensive effects of meteorological factors and vegetation characteristics.

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Last Update: 2023-08-10