The sand barrier is one of methods to break wind and control sand,because the environment is harsh in arid area with less water resource.The plastic checkerboard sand-barrier was set on the leeward of crescentic dune,and some index,such as wind velocity,transported quantity of sand,shape of surface of sand-land,depth of erosion and breakage ratio of sand barrier were observed.The results showed that:The wind velocity was decreased when the plastic checkerboard sand-barrier was set on the leeward of crescent...