台特玛湖干涸湖盆两种典型风蚀坑的三维流场特征及对风蚀的影响

doi:10.12118/j.issn.1000-6060.2022.066

Abstract

Abstract:

Blowouts in the dry lake basin of Taitema Lake, south Xinjiang, China are primarily slotted pits and saucer-shaped pits, and the surface wind erosion is not only influenced by the incoming wind velocity but also strongly influenced by the three-dimensional (3D) flow field in these blowouts. Based on wind tunnel experiments and computational fluid dynamics numerical simulations, the 3D flow field of blowouts is investigated. The following results are found: (1) From the air inlet to the air outlet, the wind speed at the bottom of the grooved and dished blowouts exhibits a change mode of deceleration-acceleration-deceleration-acceleration. The wind speed in the horizontal plane, where the upper mouth is located, exhibits a change mode of acceleration-deceleration-acceleration. The air pressure at the upper mouth also changes spatially accordingly. The overall change mode of the grooved and dished blowouts is low pressure-high pressure-low pressure. The change of trough pit is more obvious. (2) Both blowouts have a certain adsorption effect on wind and sand flow, causing wind and sand flow into the pits, accumulating energy, wind, and sand flow and intensifying wind erosion development. (3) Blowouts intensify surface erosion, and the degree of erosion is related to the scale of the blowout; the larger the scale of the blowout, the stronger the surface erosion. This study visualizes the 3D velocity, pressure, and wind-sand flow distribution patterns in trough-shaped and disc-shaped blowouts and proposes a wind-sand flow adsorption mechanism in these blowouts, the results of which can provide theoretical guidance for inland dry lake basin desertification control.

Key words: blowout, wind tunnel experiments, CFD numerical simulation, wind and sand flow

CUI Kejun, LI Shengyu, WANG Haifeng, FAN Jinglong. Three dimensional flow field characteristics of two typical blowout in the dry lake basin of Taitema Lake and their influence on wind erosion[J].Arid Land Geography, 2022, 45(6): 1784-1794.

Figures/Tables 13

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References 30

[1]	Weng W S, Hunt J, Carruthers D J, et al. Air flow and sand transport over sand-dunes[J]. Acta Mechanica, 1991, 2: 1-22. doi: 10.1007/BF01176726
[2]	Stam J M T. On the modelling of two-dimensional aeolian dunes[J]. Sedimentology, 1997, 44(1): 127-141. doi: 10.1111/j.1365-3091.1997.tb00428.x
[3]	Hesp P A, Hastings K. Width, height and slope relationships and aerodynamic maintenance of barchans[J]. Geomorphology, 1998, 22(2): 193-204. doi: 10.1016/S0169-555X(97)00070-6
[4]	Wiggs G, Weaver C M. Turbulent flow structures and aeolian sediment transport over a barchan sand dune[J]. Geophysical Research Letters, 2012, 39(5): 1-7.
[5]	蔡东旭, 李生宇, 刘耀中, 等. 台特玛湖干涸湖盆区植物风影沙丘的形态特征[J]. 干旱区地理, 2017, 40(5): 1020-1028.
	[Cai Dongxu, Li Shengyu, Liu Yaozhong, et al. Morphological characteristics of shadow dunes of plant at dry lakebed of Taitema Lake[J]. Arid Land Geography, 2017, 40(5): 1020-1028.]
[6]	Liu B, Qu J, Zhang W, et al. Numerical simulation of wind flow over transverse and pyramid dunes[J]. Journal of Wind Engineering & Industrial Aerodynamics, 2011, 99(8): 879-888.
[7]	Jungerius P D. A simulation model of blowout development[J]. Earth Surface Processes and Landforms, 1984, 9(6): 509-512. doi: 10.1002/esp.3290090604
[8]	Smyth T A G, Jackson D W T, Cooper J A G. Computational fluid dynamic modelling of three-dimensional airflow over dune blowouts proceedings of the global sand seas[J]. Journal of Coastal Research, 2011, 64: 314-318.
[9]	Smyth T A G, Jackson D W T, Cooper J A G. High resolution measured and modelled three-dimensional airflow over a coastal bowl blowout[J]. Geomorphology, 2012, 177-178: 62-73.
[10]	张德平, 王效科, 哈斯, 等. 呼伦贝尔沙质草原风蚀坑研究(1)——形态、分类、研究意义[J]. 中国沙漠, 2006, 26(6): 894-902, 1052-1058.
	[Zhang Deping, Wang Xiaoke, Hasi, et al. Hulun Buir sandy grassland blowouts: Geomorphology, classification, and significances[J]. Journal of Desert Research, 2006, 26(6): 894-902, 1052-1058.]
[11]	Jungerius P D, Witter J V, Boxel J H. The effects of changing wind regimes on the development of blowouts in the coastal dunes of the Netherlands[J]. Landscape Ecology, 1991, 6(1-2): 41-48. doi: 10.1007/BF00157743
[12]	刘建辉, 郭占荣, 雷怀彦, 等. 福建长乐东部海岸沙丘风蚀坑研究[J]. 应用海洋学学报, 2008, 27(2): 230-236.
	[Liu Jianhui, Guo Zhanrong, Lei Huaiyan, et al. A study on coast dune blowout in the east coast of Changle[J]. Journal of Applied Oceanography, 2008, 27(2): 230-236.]
[13]	Jungerius P D, Vandermeulen F. The development of dune blowouts, as measured with erosion pins and sequential air photos[J]. Elsevier, 1989, 16(4-5): 369-376.
[14]	庄燕美, 哈斯. 沙丘风蚀坑的形态及动力过程的研究进展[J]. 干旱区地理, 2005, 28(5): 632-637.
	[Zhuang Yanmei, Hasi. Research of the study on shapes and dynamical process of blowouts on dunes[J]. Arid Land Geography, 2005, 28(5): 632-637.]
[15]	贾丹阳, 熊祯祯, 高岩, 等. 近30 a台特玛湖地区土地利用/土地覆被变化及其影响因素[J]. 干旱区地理, 2021, 44(4): 1022-1031.
	[Jia Danyang, Xiong Zhenzhen, Gao Yan, et al. Land use/land cover change and influencing factors in Taitema Lake area in past 30 years[J]. Arid Land Geography, 2021, 44(4): 1022-1031.]
[16]	任宏晶. 台特玛湖干涸湖盆区沉积物含盐量对风蚀影响的风洞模拟研究[D]. 北京: 中国科学院大学, 2019.
	[Ren Hongjing. Wind tunnel simulation of the effect of sediment salt content on wind erosion in the dry lake basin of Taitema Lake[D]. Beijing: University of Chinese Academy of Sciences, 2019.]
[17]	刘晏良, 焦广辉, 戴健, 等. 塔里木河流域生态环境系统演变与治理对策研究[C]// 新疆发展和改革委员会, 中国新疆维吾尔自治区: 出版者不详, 2000.
	[Liu Yanliang, Jiao Guanghui, Dai Jian, et al. Study on the evolution of ecological environment system and control countermeasures in Tarim River Basin[C]// Xinjiang Development and Reform Commission, Xinjiang Uygur Autonomous Region, China: Publisher unknown, 2000.]
[18]	王帅, 哈斯. 沙质草原槽形风蚀坑表面沉积物粒度特征[J]. 水土保持通报, 2008, 28(6): 122-125.
	[Wang Shuai, Hasi. Particle size variation in trough blowout on sandy grassland[J]. Bulletin of Soil and Water Conservation, 2008, 28(6): 122-125.]
[19]	张惜伟. 典型沙质草原风蚀坑演化过程与发育机理研究[D]. 呼和浩特: 内蒙古农业大学, 2018.
	[Zhang Xiwei. Study on evolution process and development mechanism of wind erosion pits in typical sandy grassland[D]. Hohhot: Inner Mongolia Agricultural University, 2018.]
[20]	董周宾, 颜丹平, 张自力, 等. 基于粒子图像测速系统(PIV)的砂箱模拟实验方法研究与实例分析[J]. 现代地质, 2014, 28(2): 321-330.
	[Dong Zhoubin, Yan Danping, Zhang Zili, et al. Research on methods of sandbox modeling and case study based on particle image velocimetry(PIV)[J]. Geoscience, 2014, 28(2): 321-330.]
[21]	陈柏羽, 程建军, 李生宇. 新疆S214省道高立式芦苇沙障合理间距分析[J]. 干旱区研究, 2020, 37(3): 782-789.
	[Chen Boyu, Cheng Jianjun, Li Shengyu. Reasonable spacing of high-parallel reed sand barriers along the Xinjiang S214 provincial highway[J]. Arid Zone Research, 2020, 37(3): 782-789.]
[22]	王帅, 哈斯. 呼伦贝尔沙质草原槽形风蚀坑表面气流特征[J]. 中国水土保持科学, 2009, 7(2): 80-85.
	[Wang Shuai, Hasi. Air flow dynamics of the blowout trough in the Hulun Buir sandy grassland[J]. Science of Soil and Water Conservation, 2009, 7(2): 80-85.]
[23]	孙禹, 杜会石, 哈斯, 等. 固定沙丘风蚀坑风沙动力学观测研究[J]. 地理学报, 2016, 71(9): 1562-1570. doi: 10.11821/dlxb201609008
	[Sun Yu, Du Huishi Hasi, et al. Aeolian dynamical process of blowout on the fixed dune[J]. Acta Geographica Sinica, 2016, 71(9): 1562-1570.] doi: 10.11821/dlxb201609008
[24]	Ferguson, Victoria, Gellasch, et al. Windflow circulation patterns in a coastal dune blowout, south coast of Lake Michigan[J]. Journal of Coastal Research, 1998, 14(2): 451-462.
[25]	吴正. 风沙地貌学[M]. 北京: 科学出版社, 1987.
	[Wu Zheng. Aeolian geomorphology[M]. Beijing: Science Press, 1987.]
[26]	Hesp P. Foredunes and blowouts: Initiation, geomorphology and dynamics[J]. Geomorphology, 2002, 48(1): 245-268. doi: 10.1016/S0169-555X(02)00184-8
[27]	张德平, 孙宏伟, 王效科, 等. 呼伦贝尔沙质草原风蚀坑研究(Ⅱ): 发育过程[J]. 中国沙漠, 2007, 27(1): 20-24, 170-171.
	[Zhang Deping, Sun Hongwei, Wang Xiaoke, et al. Hulun Buir sandy grassland blowouts(Ⅱ): Process of development and landscape evolution[J]. Journal of Desert Research, 2007, 27(1): 20-24, 170-171.]
[28]	Cai D X, Li S Y, Gao X, et al. Wind tunnel simulation of the aeolian erosion on the leeward side of barchan dunes and its implications for the spatial distribution patterns of barchan dunes[J]. Catena, 2021, 207(105583): 1-12.
[29]	林永崇, 穆桂金, 秦小光, 等. 新疆楼兰地区雅丹地貌差异性侵蚀特征[J]. 中国沙漠, 2017, 37(1): 33-39.
	[Lin Yongchong, Mu Guijin, Qin Xiaoguang, et al. Erosion characteristics of Yardangs at Loulan area, Xinjiang, China[J]. Journal of Desert Research, 2017, 37(1): 33-39.]
[30]	阎旭, 张德平, 夏显东, 等. 呼伦贝尔沙质草原风蚀坑形态发育模式分析[J]. 中国沙漠, 2009, 29(2): 212-218.
	[Yan Xu, Zhang Deping, Xia Xiandong, et al. Morphology and developmental mode of blowouts in Hulun Buir sandy grassland, China[J]. Journal of Desert Research, 2009, 29(2): 212-218.]

影响因素		7.5 m·s^-1风速			8.5 m·s^-1风速
影响因素		平坦沙地沙盘	小尺度风蚀坑沙盘	大尺度风蚀坑沙盘	平坦沙地沙盘	小尺度风蚀坑沙盘	大尺度风蚀坑沙盘
质量/kg	吹蚀0 min	6.526	6.526	6.526	6.526	6.526	6.526
质量/kg	吹蚀12 min	6.337	6.321	6.309	5.506	5.474	5.435
风蚀量/kg		0.189	0.205	0.217	1.020	1.052	1.091
风蚀量百分比/%		100.00	108.47	114.81	100.00	103.14	106.96

Three dimensional flow field characteristics of two typical blowout in the dry lake basin of Taitema Lake and their influence on wind erosion

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