Wind regimes and drift potentials in the corridor of transverse dunefield in western Korqin Sandy Land

doi:10.7522/j.issn.1000-694X.2022.00017

Journal of Desert Research ›› 2022, Vol. 42 ›› Issue (4): 110-119.DOI: 10.7522/j.issn.1000-694X.2022.00017

Wind regimes and drift potentials in the corridor of transverse dunefield in western Korqin Sandy Land

Jingxue Feng¹(), Zhanliang Ding²(), Li You³, Guang Han¹

^1.School of Geographic Sciences，Hunan Normal University，Changsha 410081，China
^2.School of Resources and Environment，Baotou Normal College，Baotou 014030，Inner Mongolia，China
^3.Inner Mongolia Climate Center，Hohhot 010051，China

Received:2021-12-12 Revised:2022-02-16 Online:2022-07-20 Published:2022-08-29
Contact: Zhanliang Ding

Abstract

Abstract:

In this paper， a typical transverse dunefield in the western parts of the Korqin Sandy Land was selected as study area， and a series of automatic meteorological stations were installed at the summit， the interdune corridor and the lower stoss to observe the wind conditions inside the mobile transverse dunefield for 16 consecutive months in the field. To effectively illustrate whether the nearby weather stations can truly reflect the actual wind characteristics inside the dunefield， the hourly average data of wind regimes for the same period were obtained from the Wengniut Banner National Meteorological Station. The results show that：（1） the dominant wind direction in the corridor during the year is SW， which is basically the same as the stoss but with higher frequency， and the wind direction is deflected to the left at a large angle compared with the summit （WNW） and Wengniut Banner （NW）；（2） the average wind speed in the corridor during the year is 3.28 m?s^-1， and the average wind speed in spring can reach 4.74 m?s^-1， and the instantaneous wind speed is greater than the local threshold speed； the corridor has stronger wind and sand activities at this time， which plays an important role in shaping the complete form of the corridor and forming a stable spatial pattern of dunefield；（3） the sand transport potential of corridor is 37.94 VU， which is lower than the summit by 94.54% and higher by 86.99% than Wengniut Banner， thus it can be seen that the wind data measured by the nearby meteorological station cannot truly reflect the actual situation of wind and sand activities inside the dunefield；（4） in order to estimate the real situation of sand transport inside the dunefield more accurately， it is recommended to deploy at least one set of automatic meteorological station at the summit and another at the corridor for joint observations. This study has important theoretical and technical support value for revealing the overall wind condition change pattern of dunefield and sand disaster prevention and control.

Key words: transverse dunefield, wind regime, dominant wind, drift potential, Korqin Sandy Land

CLC Number:

P949

Jingxue Feng, Zhanliang Ding, Li You, Guang Han. Wind regimes and drift potentials in the corridor of transverse dunefield in western Korqin Sandy Land[J]. Journal of Desert Research, 2022, 42(4): 110-119.

Figures/Tables 9

References 25

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序号	部位	冬季		春季
序号	部位	高度/m	距离/m	高度/m	距离/m
1	沙丘顶部	20	0	0.3	0
2	丘间走廊	0	37	0.8	42
3	迎风坡脚	3	107	3.5	113

序号	部位	冬季		春季
序号	部位	高度/m	距离/m	高度/m	距离/m
1	沙丘顶部	20	0	0.3	0
2	丘间走廊	0	37	0.8	42
3	迎风坡脚	3	107	3.5	113

季节	地点/部位	主导风向	频率/%	次风向	频率/%	平均风速/（m·s^-1）
春季	沙丘顶部	WNW	66.7	SSW	33.3	7.43
	丘间走廊	SSE	66.7	SW	33.3	3.87
	迎风坡脚	WNW	66.7	WSW	33.3	5.20
	翁牛特旗	NW	100	—	—	3.99
夏季	沙丘顶部	SSW	66.7	S	33.3	5.39
	丘间走廊	SW	66.7	SSW	33.3	3.30
	迎风坡脚	SW	66.7	WSW	33.3	3.55
	翁牛特旗	SSW	66.7	SW	33.3	2.56
秋季	沙丘顶部	WNW	66.7	NW	33.3	5.04
	丘间走廊	SW	100	—	—	2.79
	迎风坡脚	SW	100	—	—	2.79
	翁牛特旗	NW	100	—	—	2.64
冬季	沙丘顶部	W	66.7	WNW	33.3	6.87
	丘间走廊	SW	100	—	—	3.17
	迎风坡脚	NW	66.7	SW	33.3	4.48
	翁牛特旗	WSW	100	—	—	3.25

季节	地点/部位	主导风向	频率/%	次风向	频率/%	平均风速/（m·s^-1）
春季	沙丘顶部	WNW	66.7	SSW	33.3	7.43
	丘间走廊	SSE	66.7	SW	33.3	3.87
	迎风坡脚	WNW	66.7	WSW	33.3	5.20
	翁牛特旗	NW	100	—	—	3.99
夏季	沙丘顶部	SSW	66.7	S	33.3	5.39
	丘间走廊	SW	66.7	SSW	33.3	3.30
	迎风坡脚	SW	66.7	WSW	33.3	3.55
	翁牛特旗	SSW	66.7	SW	33.3	2.56
秋季	沙丘顶部	WNW	66.7	NW	33.3	5.04
	丘间走廊	SW	100	—	—	2.79
	迎风坡脚	SW	100	—	—	2.79
	翁牛特旗	NW	100	—	—	2.64
冬季	沙丘顶部	W	66.7	WNW	33.3	6.87
	丘间走廊	SW	100	—	—	3.17
	迎风坡脚	NW	66.7	SW	33.3	4.48
	翁牛特旗	WSW	100	—	—	3.25

时间尺度	地点/部位	DP/VU	RDP/VU	RDP/DP	RDD
小时	沙丘顶部	1 092.8	667.55	0.61	ESE
	丘间走廊	86.88	54.53	0.63	NNE
	迎风坡脚	258.15	159.69	0.62	ESE
	翁牛特旗	175.23	113.64	0.65	ESE
日	沙丘顶部	695.21	480.25	0.69	ESE
	丘间走廊	37.94	29	0.76	NNE
	迎风坡脚	126.85	84.65	0.67	ESE
	翁牛特旗	20.29	14.96	0.74	ESE
月	沙丘顶部	423.91	328.91	0.78	ESE
	丘间走廊	—	—	—	—
	迎风坡脚	31.57	30.54	0.97	E
	翁牛特旗	—	—	—	—

Wind regimes and drift potentials in the corridor of transverse dunefield in western Korqin Sandy Land

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Figures/Tables 9

References 25

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地点/部位	冷锋过境状态	平均风速 /（m·s^-1）	主导风向
沙丘顶部	过境前	4.58	SSW
	过境期间	13.55	WNW
	过境后	3.52	SSW
丘间走廊	过境前	3.23	SW
	过境期间	5.34	SSW
	过境后	2.22	SW
迎风坡脚	过境前	3.51	WSW
	过境期间	6.95	NNW
	过境后	2.17	SW
翁牛特旗	过境前	4.57	SW
	过境期间	5.07	WSW
	过境后	4.25	WSW

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