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JOURNAL OF DESERT RESEARCH  2010, Vol. 30 Issue (3): 516-521    DOI:
沙漠与沙漠化     
Field Measurements of Sand Transport Rate Change under Easterly Wind Condition over Gobi Land atop Mogao Grottoes
LIU Ben-li1, ZHANG Wei-min1, LIU Xiao-ning1, ZHANG Guo-bin2, QIU Fei2, ZHAN Hong-tao2
1.Dunhuang Gobi Desert Ecological and Environmental Research Station & Key Laboratory of Desert and Desertification, Cold and Arid Regions Environmental and Engineering Research Institute, Chinese Academy of Sciences, Lanzhou 730000, China; 2.The Conservation Institute of Dunhuang Academy, Dunhuang 736200, Gansu, China
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Abstract  Based on the simultaneous observational data of wind-sand flow structure over Gobi land during a sand storm, the temporal and spatial variations of sand transport rate and wind-sand flow structure at different observation points atop Mogao Grottoes were measured and analyzed. The result shows that in condition of easterly wind, when wind speed was about 10 m·s-1, there appeared a balanceable stage of sand transport rates in the horizontal direction at different observing points, where the sand transport rates at different points from the cliff to the sand mountain were nearly the same. When wind speed was stronger than 10 m·s-1, the main wind-sand activities were wind erosion and transportation, and long distance transportation of sand material from Gobi land to the Mingsha Mountain was obvious; when wind speed was below 10 m·s-1, the long distance transportation of sand material was not strong. Under different wind speed and sand supply conditions, wind-sand flow structure and sand-transporting character may have significant changes. With the help of Lattau's equation of sand transport rate, we used the data of wind speed and sand transport rate to calculate the temporal and spatial variations of sand transport rates at different observing points. According to the calculation, the transfer efficiency of the Gobi land atop Mogao Grottoes is about 60%.
Key words:  Mogao Grottoes      Gobi      wind-sand activity      sand transport rate     
Received:  12 September 2009      Published:  20 May 2010
ZTFLH:  P931.3  

Cite this article: 

LIU Ben-li;ZHANG Wei-min;LIU Xiao-ning;ZHANG Guo-bin;QIU Fei;ZHAN Hong-tao. Field Measurements of Sand Transport Rate Change under Easterly Wind Condition over Gobi Land atop Mogao Grottoes. JOURNAL OF DESERT RESEARCH, 2010, 30(3): 516-521.

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http://www.desert.ac.cn/EN/     OR     http://www.desert.ac.cn/EN/Y2010/V30/I3/516

[1]Dong Z,Liu X,Wang X.Aerodynamic roughness of gravel surfaces[J].Geomorphology,2002,43(1-2):17-31.
[2]薛娴,张伟民,王涛.戈壁砾石防护效应的风洞试验与野外观测结果——以敦煌莫高窟顶戈壁的风蚀防护为例[J].地理学报,2000,55(3):375-383.
[3]王涛,张伟民,汪万福,等.莫高窟窟顶戈壁防护带阻截和输导功能研究[J].中国沙漠,2004,24(2):187-190.
[4]屈建军,董光荣,文子祥,等.敦煌莫高窟的风沙危害与防治问题[J].中国科学(D辑),1997,27(1):82-88.
[5]凌裕泉,屈建军,樊锦诗,等.莫高窟崖顶防沙工程的效益分析[J].中国沙漠,1996,16(1):13-18.
[6]汪万福,王涛,张伟民,等.敦煌莫高窟风沙危害综合防护体系设计研究[J].干旱区地理,2005,28(5):614-620.
[7]汪万福,安黎哲,冯虎元,等.敦煌莫高窟窟前林带防护效应的风洞实验[J].中国沙漠,2009,29(3):383-390.
[8]Zhang W,Wang T,Wang W,et al.The gobi sand stream and its control over the top surface of the Mogao Grottoes,China[J].Bulletin of Engineering Geology and the Environment,2004,63(3):261-269.
[9]Dong Z,Liu X,Wang H,et al.The flux profile of a blowing sand cloud:a wind tunnel investigation[J].Geomorphology,2003,49(3-4):219-230.
[10]Liu X,Dong Z.Experimental investigation of the concentration profile of a blowing sand cloud[J].Geomorphology,2004,60(3-4):371-381.
[11]Dong Z,Wang H,Liu X,et al.Velocity profile of a sand cloud blowing over a gravel surface[J].Geomorphology,2002,45(3-4):277-289.
[12]董治宝,屈建军,刘小平,等.戈壁表面阻力系数的实验研究[J].中国科学(D辑),2001,31(11):953-958.
[13]Bauer B O,Houser C A,Nickling W G.Analysis of velocity profile measurements from wind-tunnel experiments with saltation[J].Geomorphology,2004,59(1-4):81-98.
[14]张克存,俎瑞平,屈建军,等.腾格里沙漠东南缘输沙势与最大可能输沙量之比较[J].中国沙漠,2008,28(4):605-610.
[15]王鹏祥,孙兰东,岳平,等.盐池地区沙尘暴期间风沙运动若干特征研究[J].中国沙漠,2007,27(6):1077-1079.
[16]沈志宝,申彦波,杜明远,等.沙尘暴期间戈壁沙地起沙率的观测结果2004年春夏季两次沙尘暴期间地面气象要素变化特征对比分析[J].高原气象,2003,22(6):545-550.
[17]张伟民,汪万福,李志刚.敦煌莫高窟顶几种典型床面蚀积量变化过程的初步观测2004年春夏季两次沙尘暴期间地面气象要素变化特征对比分析[J].中国沙漠,2008,28(6):1039-1044.
[18]俎瑞平,屈建军,高前兆.三种被动式积沙仪效率的野外实验研究[J].干旱区地理,2002,25(3):214-218.
[19]赵兴梁,世界沙海的研究[M].银川:宁夏人民出版社,1993:128-138.
[20]Zhang C,Zou X,Cheng H,et al.Engineering measures to control windblown sand in Shiquanhe Town,Tibet[J].Journal of Wind Engineering and Industrial Aerodynamics,2007,95(1):53-70.
[21]Bagnold R A.The physics of blown sand and desert dunes[M].London:Methuen,1941:167-171.
[22]黄翠华,王涛,张伟民,等.沙质地表与砾质戈壁风沙运动对比研究——以敦煌莫高窟窟顶风沙运动为例[J].干旱区研究,2007,24(4):556-562.
[23]屈建军,黄宁,拓万全,等.戈壁风沙流结构特性及其意义[J].地球科学进展,2005,20(1):19-23.
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