Wind tunnel experiment on the impacts of polyacrylamide on wind erosion of loosen soil materials

Chen Quchang; Jiang Peifu; Lei Tingwu; Li Ruiping; Tang Zejun

Volume 22 Issue 10

Oct. 2006

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Transactions of the Chinese Society of Agricultural Engineering (Transactions of the CSAE) > 2006 > 22(10): 7-11.

Chen Quchang, Jiang Peifu, Lei Tingwu, Li Ruiping, Tang Zejun. Wind tunnel experiment on the impacts of polyacrylamide on wind erosion of loosen soil materials[J]. Transactions of the Chinese Society of Agricultural Engineering (Transactions of the CSAE), 2006, 22(10): 7-11.

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Wind tunnel experiment on the impacts of polyacrylamide on wind erosion of loosen soil materials

1.
College of Water Conservancy and Civil Engineering, China Agricultural University, Beijing 100083, China
2.
Department of Water Environment, China Institute of Water Resources and Hydropower Research, Beijing 100038, China
3.
Water Conservancy and Civil Engineering College, Inner Mongolia Agricultural University, Huhhot 010010, China

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Received Date: June 20, 2005
Revised Date: April 12, 2006
Published Date: October 30, 2006

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Abstract

Abstract

The disturbed and loosen soils in cultivated farmlands and onconstruction sites are known to be amongst the main sources responsible forduststorms. Controlling wind erosion of the disturbed soils is of great importancefor environmental protection. Wind tunnel experiments were conducted to study the impacts of Polyacrylamide(PAM) on the threshold wind velocity in wind erosioncontrol, and wind erosion prevention. The experiments involved four different wind approaching slopes: 0°, 10°, 20° and 30°, six soil surface treatments: 0(untreated, control), 0.5, 1, 2 and 4 g/m² of PAM, as well as surface water application. The experimental results indicate that PAM application to soil surfacecan dramatically increase the threshold wind velocity which means a good control of soil wind erosion. The threshold wind velocities of soil samples treated withwater were also higher than those of untreated samples but the degree was very limited. If the surface treated with of PAM of more than 1 g/m² with no disturbs(or no crackles on the surface), the loosen soil can withstand a strong wind of 14 m/s for more than 30 min without wind erosion.
- loosen soil,
- threshold wind velocity,
- Polyacrylamide(PAM),
- wind erosion control,
- wind tunnel

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