摘要：Disturbance in wind regime and sand erosion deposition balance may lead to burial and eventual vanishing of a *** study conducted 3D computational fluid dynamics(CFD)simulations to evaluate the effect of a proposed city design on the wind environment of the Crescent Spring,a downwind natural heritage site located in Dunhuang,Northwestern *** terrain data from the Advanced Spaceborne Thermal Emission and Reflection Radiometer(ASTER)Digital Elevation Model(DEM)were used to construct the solid surface ***-state Reynolds Averaged Navier-Stokes equations(RANS)with shear stress transport(SST)k-ωturbulence model were then applied to solve the flow field ***-use changes were modeled implicitly by dividing the underlying surface into different areas and by applying corresponding aerodynamic roughness *** were performed by using cases with different city areas and building *** show that the selected model could capture the surface roughness changes and could adjust wind profile over a large *** profiles varied over the greenfield to the north and over the Gobi land to the east of the ***,different wind speed reduction effects were observed from various city construction *** current city design would lead to about 2 m/s of wind speed reduction at the downwind city edge and about 1 m/s of wind speed reduction at the north of the spring at 35-m *** the city height in the north greenfield area could efficiently eliminate the negative effects of wind *** contrast,restricting the city area worked better in the eastern Gobi area compared with other parts of the study *** speed reduction in areas near the spring could be limited to 0.1 m/s by combining these two abatement *** CFD method could be applied to simulate the wind environment affected by other land-use changes over a large terrain.