The surface abrasion and dust emission of mud desert in dry rump lake basin

doi:10.7522/j.issn.1000-694X.2021.00224

Journal of Desert Research ›› 2022, Vol. 42 ›› Issue (4): 81-88.DOI: 10.7522/j.issn.1000-694X.2021.00224

The surface abrasion and dust emission of mud desert in dry rump lake basin

Shufeng Qu¹^,³^,⁴^,⁵(), Guoming Zhang²^,⁶(), Lianyou Liu¹^,³^,⁴^,⁵, Li Li⁷, Yuting Xiao¹^,³^,⁴^,⁵, Mingzhu Xiang¹^,³^,⁴^,⁵, Xuran Sun¹^,³^,⁴^,⁵, Xujiao Han¹^,⁵

^1.MOE Key Laboratory of Environmental Change and Natural Disaster /, Beijing Normal University，Beijing 100875，China
^2.Academy of Disaster Reduction and Emergency Management /, Beijing Normal University，Beijing 100875，China
^3.Engineering Research Center of Desertification and Blown-sand Control /, Beijing Normal University，Beijing 100875，China
^4.Faculty of Geographical Science /, Beijing Normal University，Beijing 100875，China
^5.College of National Safety and Emergency Management, Beijing Normal University，Beijing 100875，China
^6.Key Laboratory of Desert and Desertification，Northwest Institute of Eco-Environment and Resources，Chinese Academy of Sciences，Lanzhou 730000，China
^7.Changjiang River Scientific Research Institute of Changjiang Water Resources Commission，Wuhan 430010，China

Received:2021-11-11 Revised:2021-12-22 Online:2022-07-20 Published:2022-08-29
Contact: Guoming Zhang

Abstract

Abstract:

The bombardment effect of saltating sand particles on the erodible surface is an important mechanism of dust release. It is of great significance to study the aeolian abrasion process and dust release mechanism on the surface of dry lake bed to mitigate the hazards of saline-alkali dust storm. In this paper， samples from mud desert surface of dry lakebed in the West Juyan Lake were collected to conduct laboratory abrasion experiments to study the abrasion effect of sand grains at different impacting angles（30°， 45°， 60°）. The results show that：（1） The threshold sand size of erosion and dust release on mud desert surface is medium （0.25 mm<M_d<0.50 mm）. （2） When the abrasive particle size is the same， the impacting angle exerts effects on the dust release rate of mud desert surface， and the ranking order from higher dust release rate is 60°>30°>45°， but the difference of the dust release rate is not significant under such conditions. （3） When the impacting angle is 45°， the mass erosion rate and energy erosion rate of medium sand， coarse sand and extremely coarse sand on mud desert surface are 0.04 g·kg^-1 and 0.43 g·J^-1， 0.08 g·kg^-1 and 0.74 g·J^-1， 0.26 g·kg^-1 and 2.54 g·J^-1， respectively. When the grain size of sand abrader double increases while remaining the impacting angle， there is no proportional linear change in growth between the dust release rate and energy abrasion rate.

Key words: dry rump lake basin, sand particle size, mud desert surface, dust emission by abrasion

CLC Number:

P931.3

Shufeng Qu, Guoming Zhang, Lianyou Liu, Li Li, Yuting Xiao, Mingzhu Xiang, Xuran Sun, Xujiao Han. The surface abrasion and dust emission of mud desert in dry rump lake basin[J]. Journal of Desert Research, 2022, 42(4): 81-88.

Figures/Tables 8

References 27

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沙粒种类	粒径/mm	源地	过筛后质量/kg
细沙	0.125—0.25	库布齐沙漠	7.4915
中沙	0.3—0.5	日照海沙	9.4635
粗沙	0.5—1.0	西居延海	3.7960
极粗沙	1.0—2.0	西居延海	8.5800
泥漠	黏土	西居延海	19.0085

沙粒种类	粒径/mm	源地	过筛后质量/kg
细沙	0.125—0.25	库布齐沙漠	7.4915
中沙	0.3—0.5	日照海沙	9.4635
粗沙	0.5—1.0	西居延海	3.7960
极粗沙	1.0—2.0	西居延海	8.5800
泥漠	黏土	西居延海	19.0085

粒径	角度	单次500 g磨蚀后磨蚀量ΔM_x
粒径	角度	ΔM₁	ΔM₂	ΔM₃	ΔM₄	ΔM₅	ΔM₆	ΔM₇	ΔM₈	ΔM₉	ΔM₁₀
细沙	45°	0	0	0	0.01	0	0	0	0	0	0
中沙	45°	-0.02	-0.02	-0.02	-0.02	-0.02	-0.02	-0.02	-0.02	-0.02	-0.02
粗沙	45°	-0.05	0.02	-0.03	-0.05	-0.03	-0.06	-0.02	-0.04	-0.03	-0.05
极粗沙	45°	-0.19	-0.15	-0.14	-0.15	-0.12	-0.14	-0.12	-0.12	-0.13	-0.14
粗沙	30°	-0.15	-0.06	-0.06	-0.05	-0.03	-0.02	-0.03	-0.03	-0.02	-0.02
极粗沙	30°	-0.20	-0.13	-0.14	-0.14	-0.10	-0.14	-0.17	-0.12	-0.12	-0.11
粗沙	60°	-0.12	-0.12	-0.06	-0.05	-0.05	-0.06	-0.04	-0.04	-0.04	-0.04
极粗沙	60°	-0.21	-0.13	-0.20	-0.13	-0.13	-0.13	-0.12	-0.13	-0.11	-0.11

粒径	角度	单次500 g磨蚀后磨蚀量ΔM_x
粒径	角度	ΔM₁	ΔM₂	ΔM₃	ΔM₄	ΔM₅	ΔM₆	ΔM₇	ΔM₈	ΔM₉	ΔM₁₀
细沙	45°	0	0	0	0.01	0	0	0	0	0	0
中沙	45°	-0.02	-0.02	-0.02	-0.02	-0.02	-0.02	-0.02	-0.02	-0.02	-0.02
粗沙	45°	-0.05	0.02	-0.03	-0.05	-0.03	-0.06	-0.02	-0.04	-0.03	-0.05
极粗沙	45°	-0.19	-0.15	-0.14	-0.15	-0.12	-0.14	-0.12	-0.12	-0.13	-0.14
粗沙	30°	-0.15	-0.06	-0.06	-0.05	-0.03	-0.02	-0.03	-0.03	-0.02	-0.02
极粗沙	30°	-0.20	-0.13	-0.14	-0.14	-0.10	-0.14	-0.17	-0.12	-0.12	-0.11
粗沙	60°	-0.12	-0.12	-0.06	-0.05	-0.05	-0.06	-0.04	-0.04	-0.04	-0.04
极粗沙	60°	-0.21	-0.13	-0.20	-0.13	-0.13	-0.13	-0.12	-0.13	-0.11	-0.11

磨蚀类型	截距值	斜率		皮尔逊相关性指数	判定系数 (R²)
磨蚀类型	截距值	值	标准差	皮尔逊相关性指数	判定系数 (R²)
45°中沙	0	4.42×10^-5	4.85×10^-7	0.9994	0.99867
45°粗沙	0	7.53×10^-5	8.02×10^-7	0.99943	0.99876
45°极粗沙	0	2.59×10^-4	1.37×10^-6	0.99986	0.99969
30°粗沙	0	1.12×10^-4	7.37×10^-6	0.97911	0.95451
30°极粗沙	0	2.79×10^-4	3.45×10^-6	0.99924	0.99833
60°粗沙	0	1.42×10^-4	6.54×10^-6	0.98951	0.97704
60°极粗沙	0	2.98×10^-4	6.09×10^-6	0.99792	0.99543

The surface abrasion and dust emission of mud desert in dry rump lake basin

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磨蚀倾斜角度	磨蚀沙粒粒级/mm	质量磨蚀率 /（g·kg^-1）	能量磨蚀率 /（g·J^-1）
45°	中沙0.3—0.5	0.04	0.43
	粗沙0.5—1.0	0.08	0.74
	极粗沙1.0—2.0	0.26	2.54
30°	粗沙0.5—1.0	0.11	1.10
30°	极粗沙1.0—2.0	0.28	2.74
60°	粗沙0.5—1.0	0.14	1.39
60°	极粗沙1.0—2.0	0.30	2.92

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