Abstract: Relying on the photovoltaic power plant in Mu Us Sand Land, the effective engineering measures and its reasonable layout were discussed through observing the wind speed, wind speed profile and wind velocity flow field characteristics in this project area. The results showed that:(1)Solar panels make the spatial distribution of wind speed flow field changed significantly, wind speed near the surface at the wind outlet of solar panels increased while the wind speed far away the ground at wind inlet of solar panels reduced, and undercutting area and stacking area between the solar panels occurred. (2) Comparing with the project area periphery, solar panels made the wind speed in the height of 20 cm and 200 cm decreased by 44.06% and 63.68%, respectively. Wind speed is positive to height in the project area periphery and middle of the solar panels, and the wind speed below 60 cm between the solar panels increased much more obviously, which is not conducive to sand stabilization. (3) In the project area periphery, straw checkerboard barriers, gravel capping and soil covering measures play an important role in sand-fixing, in which gravel capping measures is the optimum. (4) Between the solar panels, all measures besides straw checkerboard barriers fixed sand effectively, in which gravel in undercutting area +red mud in accumulating area is the best combination.

Key words: photovoltaic power plant, wind speed profile, wind speed flow field, wind erosion control, engineering measures