Results of numerical simulation of perturbations of atmospheric flows by an actual quasi-flat relief are presented. A comparison is given with long-term minutely measurements of wind velocity and aerosol concentration conducted at atmospheric monitoring stations, which are spaced from 0.8 to 5.2 km apart. The comparison of results points to a qualitative adequacy of the model (relief effect) and measurements in the range of local scales and mesoscales between 0.8 and 5.2 km.