Spatial Variability of the Wind Erosion Sediment Caused by the Sand-driving Wind in Patch Vegetation Zone of Desert-Oasis Ecotone

Hu Guanglu; Wang Dejin; Liao Yaxin; Zhang Hongwei

doi:10.7522/j.issn.1000-694X.2015.00248

2016 , Vol. 36 >Issue 4: 902 - 910

DOI: https://doi.org/10.7522/j.issn.1000-694X.2015.00248

Spatial Variability of the Wind Erosion Sediment Caused by the Sand-driving Wind in Patch Vegetation Zone of Desert-Oasis Ecotone

Hu Guanglu ,
Wang Dejin ,
Liao Yaxin ,
Zhang Hongwei

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School of Environmental and Municipal Engineering, Lanzhou Jiaotong University, Lanzhou 730070, China

Received date: 2015-09-30

Revised date: 2015-11-01

Online published: 2016-07-20

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Abstract

With the data of the sand-driving wind collected in the Linze Inland River Basin Research Station which is about 2 kilometers away from the sampling area, we observed the wind erosion sediment directly in the patch vegetation zone of oasis-desert ecotone in Linze, Gansu in 2012-2013. The results showed that: (1)From April to July in 2012, the process of the wind erosion sediment was randomly variatied. While in August of 2012 and from March to July in 2012, the process was with a structural variation. (2)In the process of random variation, the correlation relationship between the sand-driving wind and the wind erosion sediment decline in sequence from wind speed, direction to frequency. But in the process of structural variation, the sequence of the correlation relationship is wind direction, speed and frequency. (3)In the process of random variation, the relation (R²=0.9164) is closer than that in the process of structural variation (R²=0.6526) between the drift potential (DP) and the wind erosion sediment. But it is opposite between the resultant drift potential (RDP) and the wind erosion sediment. It is not obvious (R²=0.0745) in the process of random, while it is very close (R²=0.9343) in the process of structural variation. (4)The wind erosion sediment is patchy distributed in the process of random variation, but concentrated distributed with the zonation in the process of structural variation.

Key words： desert-oasis ecotone; sand-driving wind; wind erosion sediment; spatial variability

Cite this article

Hu Guanglu , Wang Dejin , Liao Yaxin , Zhang Hongwei . Spatial Variability of the Wind Erosion Sediment Caused by the Sand-driving Wind in Patch Vegetation Zone of Desert-Oasis Ecotone[J]. Journal of Desert Research, 2016 , 36(4) : 902 -910 . DOI: 10.7522/j.issn.1000-694X.2015.00248

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