Abstract: Straw checkerboard barrier is a kind of very useful barriers to reduce wind-blown sand transportation. According to the characteristics of the actual flow field in straw checkerboard barriers, a theoretical model, that is one-row-vortex model, is suggested to simulate the flow field in the straw checkerboard barriers. The measurements for one straw checkerboard barrier, such as its length and its height out of the sand bed, which have very important influence on the effect of the sand-breaks, are calculated by the model and hydrodynamic theory.

Key words: straw checkerboard barriers, hydrodynamics, theory model