Effect of Hop-pocket Sand Barrier on the Wind and Sand Flow and Soil Moisture of Mobile Dune

YUAN Limin; GAO Yong; ZHANG Wenjun; DANG Xiaohong; HU Xiaolong; NA Qin

doi:10.3981/j.issn.1000-7857.2014.03.011

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Science & Technology Review ›› 2014, Vol. 32 ›› Issue (3) : 71-76. DOI: 10.3981/j.issn.1000-7857.2014.03.011

Articles

Effect of Hop-pocket Sand Barrier on the Wind and Sand Flow and Soil Moisture of Mobile Dune

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1. College of Ecology and Environmental Science, Inner Mongolia Agricultural University, Hohhot 010018, China;
2. Inner Mongolia Academy of Forestry Science, Hohhot 010010, China;
3. Inner Mongolia Academy of Agriculture and Animal Husbandry, Hohhot 010031, China

Abstract

To understand the influence of hop-pocket sand barrier on wind and sand flow and soil moisture, the wind-break potency, surface roughness, parameters of sediment transport rates and soil moisture of 1 m×1 m, 2 m×2 m, 3 m×3 m square hop-pocket sand barrier were studied through anemometry, sand collection of ground 30 cm and soil moisture of underground 0-40 cm on sand dune. The results showed that hop-pocket sand barrier can improve the wind-break potency of 0-30 cm height range effectively, increasing the sand dune surface roughness, reducing the sediment discharge of 0-30 cm height range significantly. The order of wind-break potency of hop-pocket sand barrier was 1 m×1 m>2 m×2 m>3 m×3 m. The difference of 1 m×1 m was significant compared to 2 m× 2 m and 3 m×3 m, and there was no significant difference between 2 m×2 m and 3 m×3 m. The order of surface roughness was 1 m× 1 m>2 m×2 m>3 m×3 m>CK; the roughness of 1 m×1 m, 2 m×2 m and 3 m×3 m were increased by 91.31%, 78.88% and 76.26% higher than the control and the differences were significant (P<0.001). 0-30 cm sediment discharge of the control reached 71.43 g/(min·cm²), and it was 32.98 times more than hop-pocket sand barrier.λ eigenvalues was the sediment discharge ratio of 2-10 cm and 0-1 cm of hop-pocket sand barrier and the control, and λ >1, deducing that their surfaces were wind eroded during the monitoring period. The order of soil moisture was CK>3 m×3 m>2 m×2 m>1 m×1 m, the trend of 0-20 cm layer was obvious, and soil moisture of the control was increased by 55.10%, 58.63% and 67.45% higher than 3 m×3 m、2 m×2 m and 1 m×1 m hop-pocket sand barrier.

Key words

Kubuqi Desert / hop-pocket sand barrier / wind-break potency / surface roughness / sediment discharge / soil moisture

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YUAN Limin, GAO Yong, ZHANG Wenjun, DANG Xiaohong, HU Xiaolong, NA Qin. Effect of Hop-pocket Sand Barrier on the Wind and Sand Flow and Soil Moisture of Mobile Dune[J]. Science & Technology Review, 2014, 32(3): 71-76 https://doi.org/10.3981/j.issn.1000-7857.2014.03.011

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