Study of Sand Control Effects of. Nylon NetÂ· Fences

Jlann Jun Qu; Ke Cun Zhang; Rui Ping Zu; Jia Qiang Lel; Hai Yan Fang

doi:10.56093/aaz.v45i2.65084

Authors

Jlann Jun Qu Key Laboratory of Desert and Desertification, Cold and Arid Environmental and Engineering Research Institute, Lanzhou 730000, Gansu Province, China
Ke Cun Zhang Key Laboratory of Desert and Desertification, Cold and Arid Environmental and Engineering Research Institute, Lanzhou 730000, Gansu Province, China
Rui Ping Zu Key Laboratory of Desert and Desertification, Cold and Arid Environmental and Engineering Research Institute, Lanzhou 730000, Gansu Province, China
Jia Qiang Lel Key Laboratory of Desert and Desertification, Cold and Arid Environmental and Engineering Research Institute, Lanzhou 730000, Gansu Province, China
Hai Yan Fang Key Laboratory of Desert and Desertification, Cold and Arid Environmental and Engineering Research Institute, Lanzhou 730000, Gansu Province, China

https://doi.org/10.56093/aaz.v45i2.65084

Abstract

Field monitoring and wind tunnel simulation of sand control effects of nylon net fences showed that these fences are not only more effective in sand-blocking, but also can divert the sand flow. Such function widens its application range and also provides an effective way to control movi?g sand in Gobi area. Nylon net fence, more effective than wooden fence, is of two types, namely dense type with an optimal porosity ranging from 40-50%. This type of fence can provide protection for downwind area up to 30 times the height of fence. Under medium wind velocity condition (V = 10-15 m.s-1), the sand-blocking rate can exceed 70%; even under very strong wind condition (V> 18 m.s-l) the sand accumulation rate can exceed 50%. Nylon net fence also deflects the moving sand, with a critical angle of 45Â°. If the angle between the fence and the prevailing wind direction exceeds 45Â° its sand diversion efficiency will be reduced.