The aeolian sand structure at the brink of barchans is critical to the understanding of the dune morphodynamic process, and thus providing the basic data support and theoretical foundation for the protection and ecological reconstruction in arid regions. In the current study, the traditional passive sand-collectors are used to observe the sand movement at the height range of 0-60 cm above the barchan brink in the cases of positive and reverse wind directions respectively, and then the obtained mass flux density distribution curves are analyzed by means of function fitting. It is shown that the amount of sediment driven by the positive winds is a power function of height, and the mass transport mainly occurs in the height of 0-30 cm; Whereas in the case of reverse wind direction with the increase of height, the sediment amount increases first and then begins to monotonely decrease at the height of 30-50 cm the change trend approximately obeys the double Gaussian function.
[1] 吴正.风沙地貌与治沙工程学[M].北京:科学出版社,2003:61-71,144.
[2] 王静.荒漠草原地表风沙流变化研究——以希拉穆仁草原为例[D].呼和浩特:内蒙古师范大学,2012.
[3] 熊敏,何清,杨兴华,等.塔克拉玛干沙漠平坦沙地风沙流结构的空间差异性研究[J].信阳师范学院学报(自然科学版),2017,30(3):412-416.
[4] 康永德,杨兴华,何清,等.塔克拉玛干沙漠腹地贴地层风沙流结构研究[J].沙漠与绿洲气象,2017,11(2):74-81.
[5] 杨兴华,何清,艾力·买买提明.塔克拉玛干沙漠腹地塔中地区风沙流输沙特征研究[J].干旱区地理,2011,34(3):479-485.
[6] 周颖,曹月娥,杨建军,等.古尔班通古特沙漠东缘风沙流结构特征[J].水土保持学报,2016,30(3):78-83.
[7] 陶彬彬,刘丹,管超,等.库布齐沙漠南缘抛物线形沙丘表面风沙流结构变异[J].地理科学进展,2016,35(1):98-107.
[8] 宗玉梅,俎瑞平,王睿,等.库布齐沙漠含水率对风沙运动影响的风洞模拟[J].水土保持学报,2016,30(6):61-66.
[9] 包岩峰,丁国栋,吴斌,等.毛乌素沙地风沙流结构的研究[J].干旱区资源与环境,2013,27(2):118-123.
[10] 尹瑞平,郭建英,董智,等.黄河乌兰布和沙漠段沿岸不同高度典型沙丘风沙特征[J].水土保持研究,2017,24(5):157-161.
[11] 张正偲,董治宝.腾格里沙漠东南部野外风沙流观测[J].中国沙漠,2013,33(4):973-980.
[12] 哈斯.腾格里沙漠东南缘沙丘表面风沙流结构变异的初步研究[J].科学通报,2004,49(11):1099-1104.
[13] 杨转玲,钱广强,董治宝,等.库姆塔格沙漠北部三垄沙地区风沙运动特征[J].中国沙漠,2018,38(1):58-67.
[14] 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.
[15] 何清,胡文峰,杨兴华,等.巴丹吉林沙漠拐子湖地区贴地层风速廓线和风沙流结构特征[J].干旱区研究,2012,29(3):517-523.
[16] 陈新闯,郭建英,董智,等.绿洲边缘新月形沙丘表层沉积物粒度与重金属分布特征[J].环境科学学报,2015,35(11):3662-3668.
[17] 李志中.新月形沙丘研究进展综述[J].干旱区地理,1994,17(4):81-87.
[18] 董玉祥,Hesp P A,Namikas S L,等.海岸横向沙脊表面风沙流结构的野外观测研究[J].地理科学,2008,28(4):507-512.
[19] 韩致文,缑倩倩,杜鹤强,等.新月形沙丘表面100 cm高度内风沙流输沙量垂直分布函数分段拟合[J].地理科学,2012,32(7):892-897.
[20] 杜鹤强,韩致文,王涛,等.新月形沙丘表面风速廓线与风沙流结构变异研究[J].中国沙漠,2012,32(1):9-16.
[21] 常兆丰,李亚,张剑挥,等.新月形沙丘稳定性机理——以甘肃河西沙区为例[J].生态学报,2017,37(13):4375-4383.
[22] Wang Z T,Zhang J W,Zhang Q H,et al.Barchans of Minqin:sediment transport[J].Geomorphology,2008,96(1):233-238.
[23] Yang Y Y,Qu Z Q,Shi P J,et al.Wind regime and sand transport in the corridor between Badain Jaran and Tengger deserts,central Alxa Plateau,China[J].Aeolian Research, 2014,12(2):143-156.
[24] 戴晟懋,邱国玉,赵明.甘肃民勤绿洲荒漠化防治研究[J].干旱区研究,2008,25(3):319-324.
[25] 杨岩岩.阿拉善高原主要输沙带风沙地貌过程研究[D].北京:北京师范大学,2015.
[26] 姚正毅.阿拉善高原风沙运动与沙漠化研究[D].兰州:中国科学院寒区旱区环境与工程研究所,2006.
[27] 王仁德,李庆,常春平,等.新型平口式集沙仪对不同粒级颗粒的收集效率[J].中国沙漠,2018,38(4):1-5.
[28] Wang Z T,Zhang C L,Cen S B.Unsteady aeolian saltation[J].The European Physical Journal.E,Soft Matter,2018,41(10):121.
[29] 陈新闯.乌兰布和沙漠黄河沿岸磴口段风积沙运移过程与规律[D].泰安:山东农业大学,2016.
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