The wind and sand resistance effect of four vegetation types in Ulan Buhe Desert

doi:10.7522/j.issn.1000-694X.2022.00052

Journal of Desert Research ›› 2022, Vol. 42 ›› Issue (6): 65-73.DOI: 10.7522/j.issn.1000-694X.2022.00052

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The wind and sand resistance effect of four vegetation types in Ulan Buhe Desert

Yingkun Li¹^,²(), Jinrong Li²(), Le Dong², Xiangying Luo¹^,², Zhaoen Han¹^,², Ru Wang¹^,²

^1.College of Desert Control Science and Engineering / Inner Mongolia Key Laboratory of Aeolian Physics and Desertification Control Engineering，Inner Mongolia Agricultural University，Hohhot 010011，China
^2.Yinshanbeilu National Field Research Station of Steppe Eco-hydrological System，China Institute of Water Resources and Hydropower Research，Beijing 100038，China

Received:2022-03-20 Revised:2022-05-04 Online:2022-11-20 Published:2023-01-09
Contact: Jinrong Li

Abstract

Abstract:

In this study， we revealed the effects of wind prevention and sand resistance of different vegetation types in desert ecosystems by studying the influence of typical plant plots in desert ecosystems on near-surface wind and sand activities. We studied the aeolian sand activity in four typical plant communities （i.e.Artemisia ordosica， Sarcozygium xanthoxylon， Haloxylon ammodendron and Tetraena mongolica） in the desert-oasis transition zone on the northeastern edge of the Ulan Buhe Desert. Meanwhile， the aeolian sand activity of the bare dunes was also studied as a control plot （CK）. Our results showed that the wind speed profile in the 4 plots conform to logarithmic distribution law. The surface roughness of the four plots increased significantly when compared with the bare dune （CK）， and the windproof performance decreased with the increasing of the height from the ground. Within the plant height range， all four plots showed excellent windproof performance. The windproof performance decreased in the space above the height of the plant， but plant still showed a certain windproof effect. The difference of wind prevention and sand fixation effect of communities was due to the difference of vegetation configuration. The sediment transport rate in the 4 community plots was conformed to the exponential function Q=a+e ^bH （a>0， b<0）， and was significantly lower than that in the control plot. The four communities had good wind and sand blocking effects in this area， among which， H. ammodendron showed the best sand blocking effect within the height range of 0-100 cm from the ground， followed by S. xanthoxylon and T. mongolica， and A. ordosica showed the lowest sand blocking effect. The wind performance effect of vegetation was significant linearly correlated with vegetation height， coverage and lateral coverage. Community height， coverage and lateral coverage， as a form of quantification of plant configuration， also played a key role. All four communities we studied show excellent effect of wind proof and sand resistance in Ulan Buhe Desert.

Key words: community, sand flow structure, sand transport, wind and sand resistance effect, Ulan Buhe Desert

CLC Number:

P931.3

Yingkun Li, Jinrong Li, Le Dong, Xiangying Luo, Zhaoen Han, Ru Wang. The wind and sand resistance effect of four vegetation types in Ulan Buhe Desert[J]. Journal of Desert Research, 2022, 42(6): 65-73.

Figures/Tables 9

Fig.1 Landscape of four community plots

Fig.2 Wind speed profiles of different community plots

Fig.3 Wind resistance effect of four community plots changing with height

Fig.4 Variation of sediment transport rate along height of four community plots and plots

Fig.5 The proportion of cumulative sediment transport rate of four community plots and their corresponding plots varies along the height

Fig.6 Sediment resistance effects of four community plots

Fig.7 Vertical distribution of community lateral coverage

Table 1 Fitting of wind resistance effect and vegetation configuration parameters

H 系数a₁	C系数a₂	C_侧系数a₃	常数a₀	R²	Prob>F	显著性
0.20			37.71	0.29	0.02698	显著
	1.97		30.19	0.49	0.00325	极显著
		0.68	32.32	0.55	0.00140	极显著
-0.17	3.25		29.56	0.49	0.00978	极显著
0.07		0.58	29.69	0.54	0.00547	极显著
	1.08	0.46	25.85	0.62	0.00185	极显著
-0.19	2.45	0.47	25.06	0.65	0.00343	极显著

Table 2 Fitting of sand fixation effect and vegetation configuration parameters

H系数 a₁	C系数 a₂	C_侧系数 a₃	常数 a₀	R²	Prob>F	显著性
0.23			39.37	0.11	0.0263	显著
	2.97		22.79	0.35	0.00008	极显著
		0.59	38.85	0.14	0.01339	显著
-0.74	8.17		24.56	0.55	0.000000415	极显著
0.10		0.43	35.63	0.13	0.0382	显著
	3.41	-0.18	23.68	0.33	0.00039	极显著
-0.73	8.36	-0.09	25.02	0.54	0.00000218	极显著

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The wind and sand resistance effect of four vegetation types in Ulan Buhe Desert

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