By wind tunnel test

the sand preventing mechanism of geo-grid cell sand-barrier

stone-checker sand-barrier and vegetation sand-barrier are studied.The wind velocity profile

wind velocity flow field and structural features of wind sand flows are analyzed.The sand preventing effects of three different sand-barriers are compared.The results showed that the vegetation has prominent effect on wind prevention

and the affection enhanced gradually with the increase of the coverage.Meanwhile

the change of wind speed also related to the luxuriance degree of plants.But to stone-checker sand-barrier

because stone block composing stone-checker is irregular

the experimental result had certain differences on the general regularity.Generally speaking

the protection effect of vegetation is far superior to geocell and stone-checker.To the low wind speed

the geocell and stone-checker is effective

but to the high wind speed

the vegetation is much suitable.For stone-checker and geocell

the protective efficiency of stone-checker is slightly better than geocell.