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Wind Erosion:
An International Symposium/Workshop

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Wind-sandy Environment and the Effects of Vegetation on Wind Breaking
and Dune Fixation in Horqin Sandy Land, China

Zongying He, Shenggong Li, and Yoshinobu Harazono


Horqin Sandy Land belongs to the semi-arid zone with plentiful sand. Its annual precipitation is about 360mm, and concentrates at summer season. With strong and frequent wind in spring and unsuitable socio-economic activities, soil erosion and desertification in this area is easy engender. Establishing vegetation in sand dunes is one of the methods to prevent wind erosion and fix ground surfaces. In comparison with the shifting dune, the sand transport rate for vegetation reduced by two orders of magnitude. The micrometeorological measurement results show that, after vegetation established, there was smaller shearing stress on the ground surface of vegetation. It means the vegetation can absorb part of momentum transited down from the upper air, and decrease the momentum obtained by the surface sand, thus reduce the sand activities.