Application of WT Model to Wind Forecasting and Correction of Expressway in Mountainous Area
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Abstract:
Using the maximum wind speed data of 142 national meteorological stations in Hebei Province from 2001 to 2020, this paper analyzes the background of wind speed change in Hebei Province in recent 20 years. We select 30 representative days from February to May in 2021 with a daily extreme wind speed over 13.9 m/s and the daily 10min average maximum wind speed over 8 m/s. Using the wind observation data of the meteorological stations in Chongli, Nanwopu, Changdi, Gaojiaying and Xiwanzi, the ground 10 m wind forecast data in the corresponding period of time output by ECMWF model, and the SRTM3 terrain data with 3″ resolution, the wind forecast results along the Zhangcheng Expressway in two regions of Chongli mountain area are simulated and verified by using the WT model. It is found that the correlation coefficient of wind speed of the WT model with actual observation reaches 0.6225 and passes the significance test. The error of more than 80% of the samples between simulation results and the actual situation is controlled within ±2 m/s. The error of the open terrain is obviously small. The wind direction also shows high consistency. It is proved that using the WT model to revise the wind numerical forecast along the mountain expressway is feasible. The local terrain data and the relatively stable and reliable wind numerical forecast products can be used to drive the WT model to carry out the revision application of winds along the highway in mountainous areas.
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Supported by:Beijing E-Tiller Technology Development Co., Ltd.
Supported by:Beijing E-Tiller Technology Development Co., Ltd.