img

Wechat

  • CN 62-1070/P
  • ISSN 1000-694X
  • Bimonthly 1981
Adv search

Grain Size Characteristics of Dustfall in the Ulan Buh Desert

  • Chen Xinchuang ,
  • Guo Jianying ,
  • Dong Zhi ,
  • Li Hongli ,
  • Li Jinrong ,
  • Wang Heyun
Expand
  • 1. Forestry College/Shandong Provincial Key Laboratory of Soil Erosion and Ecological Restoration/Taishan Forest Ecosystem Research Station, Shandong Agricultural University, Taian 271018, Shandong, China;
    2. Institute of Water Resources for Pastoral Area of the Ministry of Water Resources of China, Hohhot 010020, China

Received date: 2014-11-27

  Revised date: 2015-01-08

  Online published: 2016-03-20

Abstract

The dustfall at different height and distance along leeward direction of the typical shifting sand dunes in the hinterland of the Ulan Buh Desert was studied by means of continuous spot observation and particle size analysis. The results show that the spatial variability of the dustfall is significant in the Ulan Buh Desert. The dustfall is mainly dominated by fine sand. Fine sand is gradually reduced with the increase of the distance along leeward direction of the typical shifting sand dunes. Silt and very fine sand increased rapidly with the increase of the distance along leeward direction of the typical shifting sand dunes. The average grain size of the dustfall is in the range from 2.5 Φ to 3.1 Φ, and it grows with the increase of the distance and the height along leeward direction of the typical shifting sand dunes. The sorting coefficient becomes worse with the increase of distance and height along leeward direction of the typical shifting sand dunes. The skewness coefficients is close to symmetry at 2 m height, and positive at 8 H distance when the height of sand dune is H. But at 0.5 m height, it is symmetrical at 0.5 H-1 H distance and positive skewed at 2 H-8 H distance along leeward direction of the typical shifting sand dunes. Kurtosis changes to narrow gradually with distance increase, and the change at 2 m height is later than at 0.5 m height. It can be assumed that the dustfall of the Ulan Buh Desert is mainly from the local material, and the proportion of material from the far sources and regional material is small. The proportion of material from the far sources and regional material (<70 μm) is positively correlated to leeward distance and mainly from the waste land in desert fringe area, the sediment of rivers and lakes, farmland region. But the proportion of local material (>70 μm) is negatively correlated to downwind distance and mainly from the short distance transport of airflow in underlying surface of dune.

Cite this article

Chen Xinchuang , Guo Jianying , Dong Zhi , Li Hongli , Li Jinrong , Wang Heyun . Grain Size Characteristics of Dustfall in the Ulan Buh Desert[J]. Journal of Desert Research, 2016 , 36(2) : 295 -301 . DOI: 10.7522/j.issn.1000-694X.2015.00012

References

[1] 钱广强,董治宝.大气降尘收集方法及相关问题研究[J].中国沙漠,2004,24(6):779-782.
[2] 刘东生,韩家懋,张德二,等.降尘与人类世沉积——Ⅰ:北京2006年4月16~17日降尘初步分析[J].第四纪研究,2006,26(4):628-633.
[3] 刘新春,钟玉婷,王敏仲,等.塔里木盆地大气降尘变化特征及影响因素分析[J].中国沙漠,2010,30(4):954-960.
[4] 高贵生,宋理明,马宗泰.青海省降尘量时空分布及其影响因素分析[J].中国沙漠,2013,33(4):1124-1130.
[5] 张正偲,董治宝.腾格里沙漠东南缘春季降尘量和粒度特征[J].中国环境科学,2011,31(11):1789-1794.
[6] 李晋昌,董治宝,王训明.中国北方东部地区春季降尘量及其环境意义[J].中国沙漠,2008,28(2):195-201.
[7] 李晋昌,康晓云,高婧.黄土高原东部大气降尘量的空间和季节变化[J].中国环境科学,2013,33(10):1729-1735.
[8] 张宁,张武平,张萌.沙尘暴降尘对甘肃大气环境背景值的影响研究[J].环境科学研究,2005,18(5):6-10.
[9] Christoph H,Robert G,Urs B.Chemical characterisation of PM2.5,PM10 and coarse particles at urban,near city and rural sites in Switzerland[J].Atmospheric Environment,2005,39(4):637-651.
[10] Zhang X L,Wang Y C.Analysis and case study of duststorms in the Beijing area[J].Water,Air and Soil Pollution:Focus,2003,3(2):103-115.
[11] 倪刘建,张甘霖,阮心玲,等.南京市不同功能区大气降尘的沉降通量及污染特征[J].中国环境科学,2007,27(1):2-6.
[12] 张正偲,董治宝.降尘收集方法对降尘效率的影响[J].环境科学,2013,34(2):499-508.
[13] 徐虹,林丰妹,毕晓辉,等.杭州市大气降尘与PM10化学组成特征的研究[J].中国环境科学,2011,31(1):1-7.
[14] 师育新,戴雪荣,宋之光,等.上海春季沙尘与非沙尘天气大气颗粒物粒度组成与矿物成分[J].中国沙漠,2006,26(5):780-785.
[15] Odabasi M,Muezzinoglu A,Bozlaker A.Ambient concentrations and dry deposition fluxes of trace elements in Izmir,Turkey[J].Atmospheric Environment,2002,36(38):5841-5851.
[16] 李晋昌,董治宝,钱广强,等.中国北方不同区域典型站点降尘特性的对比[J].中国沙漠,2010,30(6):1269-1277.
[17] Massadeh A,Jaradat Q,Obiedat,M.Chemical speciation of lead and cadmium in different size fractions of dust samples from two busy roads in Irbid city,Jordan[J].Journal of Soil Contamination,2007,16(4):371-382.
[18] Wang X M,Zhang C X,Wang H T,et al.The significance of Gobi desert surfaces for dust emissions in China:an experimental study[J].Environmental Earth Sciences,2011,64(4):1039-1050.
[19] Ta W Q,Zheng X,Qu J J,et al.Characteristics of dust particles from the desert/Gobi area of northwestern China during dust-storm periods[J].Environmental Geology,2003,43(6):667-679.
[20] Sun J,Liu T,Lei Z.Sources of heavy dust fall in Beijing,China on April,16,1998[J].Geophysical Research Letters,2000,27(14):2105-2108.
[21] Bory A J,Biscaye P E,Svensson A,et al.Seasonal variability in the origin of recent atmospheric mineral dust at NorthGRIP,Greenland[J].Earth and Planetary Science Letters,2002,196(3/4):123-134.
[22] Xuan J,Sokolik I N.Characterization of sources and emission rates of mineral dust in Northern China[J].Atmospheric Environment,2002,36(31):4863-4876.
[23] 石广玉,赵思雄.沙尘暴研究中的若干科学问题[J].大气科学,2003,27(4):591-606.
[24] 王式功,董光荣,杨德保,等.中国北方地区沙尘暴变化趋势初探[J].自然灾害学报,1996,5(2):86-94.
[25] Folk R L,Ward W C.Brazos river bar [Texas] :a study in the significance of grain size parameters[J].Journal of Sedimentary Research,1957,27(1):3-26.
[26] 樊恒文,肖洪浪,段争虎,等.中国沙漠地区降尘特征与影响因素分析[J].中国沙漠,2002,22(6):559-565.
[27] Pye K.Aeolian Dust and Dust Depositions[M].London,UK:Academic Press,1987:49.
[28] 汪季,董智.荒漠绿洲下垫面粒度特征与供尘关系的研究[J].水土保持学报,2005,19(6):9-11,14.
[29] 王丽英,李红丽,董智,等.沙柳方格沙障对库布齐沙漠防风固沙效应的影响[J].水土保持学报,2013,27(5):115-118,124.
[30] Sweet M L,Kocurek G.An empirical model aeolian dune lee-face airflow[J].Sedimentology,1990,37(6):1023-1038.
[31] 钱广强,董治宝,罗万银,等.横向沙丘背风侧沙粒风蚀起动的风洞模拟[J].干旱区地理,2007,30(1):66-70.
[32] Walker I J,Nickling W G.Dynamics of secondary airflow and sediment transport over and in the lee of transverse dunes[J].Progress in Physical Geography,2002,26(1):47-75.
Outlines

/