Analysis on wind characteristics under the complex terrain based on the observation and simulation

Extreme wind event is one of the major natural disasters in complex terrain areas, and it is also an important factor to be considered in construction projects in different regions. In order to analyze the simulation ability of numerical model during a synoptic process under the complex terrain in the Tibetan Plateau, the wind data observed from the wind lidar observation system and the high-resolution numerical model data simulated by WRF model were be used in this study. The statistical analysis methods was used to investigate the horizontal distribution characteristics of the wind around the observation point (OP) region in detail. The results show that the time series of wind observation data between the different heights in the near-surface boundary layer have well consistency, the correlation coefficients are 0.9777, 0.9856, and 0.9436. The simulated wind is flowed from the mountain ridge to the mountain valley around the OP region. The strong wind may occur when the southerly air flow prevails around the OP region, on the contrary, the strong wind may not occur when the westerly air flow prevails. The differences of the maximum wind speed between simulation and observation are large at 40 m height and small at 160 m height, while the differences of the minimum wind speed are small at 40 m height and large at 160 m height. There is a significantly correlated between observed and simulated wind speed, and the correlation coefficient are 0.3089 at 40 m height, 0.3063 at 100 m height, and 0.2522 at 160 m height. The model can be used to study the wind characteristics under the complex terrain where the lack of observation stations. The observation data and analysis results are expected to be useful for the wind-resistant design of construction projects under the complex terrain regions.