## 4 Results and Discussions
\begin{table}
\begin{tabular}{r c c c c c c c c c c} \hline \hline \multirow{2}{*}{**Number**} & \multirow{2}{*}{**Stations**} & \multirow{2}{*}{**Observation**} & \multirow{2}{*}{\(v_{\rm 80}\) **(m/s)**} & \multicolumn{4}{c}{**Simulated Wind Speed Data (m/s)**} & \multirow{2}{*}{\(v_{\rm u}\) **(m/s)**} & \multirow{2}{*}{\((v_{\rm u}-v_{\rm 50})/v_{\rm 50}\times 100\%\)} \\  & & & & **Case 1** & & & **Case 2** & & **Case 3** & **Case 4** & **Case 5** & \\ \hline
1 & Iaojiang & 19 & 39.62 & 24.71 & 21.01 & 9.37 & 25.2 & 22.77 & 25.2 & \(-\)36.40 \\
2 & Jiaojiang District/Jiazhi & 14 & 16.12 & 24.59 & 21.75 & 23.88 & 28.34 & 25.09 & 28.34 & 75.56 \\
3 & Jiaojiang & 51 & 27.27 & 22.87 & 19.98 & 23.87 & 23.91 & 27.30 & 27.30 & 0.11 \\
4 & Jiaojiang & 19 & 25.13 & 26.34 & 23.75 & 14.41 & 27.52 & 27.62 & 27.62 & 9.83 \\
5 & Wenling & 14 & 16.17 & 26.41 & 24.16 & 32.3 & 35.47 & 32.34 & 35.47 & 119.54 \\
6 & Wenling City/Zergao & 19 & 26.14 & 25.21 & 24.44 & 27.97 & 34.28 & 35.44 & 35.44 & 7.12 \\
7 & Wenling City/Rueheng & 16 & 10.76 & 23.37 & 20.4 & 28.52 & 22.87 & 25.04 & 28.52 & 164.87 \\
8 & Wenling City/Xinhe & 17 & 20.31 & 23.27 & 19.92 & 36.11 & 27.56 & 24.15 & 36.11 & 77.74 \\
9 & District/Qinggang & 15 & 29.54 & 19.95 & 18.46 & 26.49 & 17.86 & 22.97 & 26.49 & \(-\)10.33 \\
10 & Yuhan District/Longsi & 9 & 20.92 & 20.52 & 19.32 & 24.45 & 19.53 & 21.91 & 24.45 & 16.85 \\
11 & Sanmen & 8 & 18.52 & 27.85 & 22.66 & 32.10 & 29.92 & 26.75 & 32.10 & 73.33 \\
12 & \multicolumn{1}{c}{} & \multicolumn{1}{c}{} & \multicolumn{1}{c}{} & \multicolumn{1}{c}{} & \multicolumn{1}{c}{} & \multicolumn{1}{c}{} & \multicolumn{1}{c}{} & \multicolumn{1}{c}{} & \multicolumn{1}{c}{} \\  & \multicolumn{1}{c}{} & \multicolumn{1}{c}{} & \multicolumn{1}{c}{} & \multicolumn{1}{c}{} & \multicolumn{1}{c}{} & \multicolumn{1}{c}{} & \multicolumn{1}{c}{} & \multicolumn{1}{c}{} & \multicolumn{1}{c}{} & \multicolumn{1}{c}{} \\  & \multicolumn{1}{c}{} & \multicolumn{1}{c}{} & \multicolumn{1}{c}{} & \multicolumn{1}{c}{} & \multicolumn{1}{c}{} & \multicolumn{1}{c}{} & \multicolumn{1}{c}{} & \multicolumn{1}{c}{} & \multicolumn{1}{c}{} & \multicolumn{1}{c}{} & \multicolumn{1}{c}{} \\
13 & Tianual District/Fuxi & 9 & 6.92 & 21.24 & 20.48 & 30.83 & 25.32 & 31.88 & 31.88 & 360.47 \\
14 & Tianual District/Fuxi & 15 & 20.31 & 18.58 & 25.15 & 31.04 & 32.83 & 29.81 & 32.83 & 61.67 \\
15 & Xianju District/Hengci & 15 & 16.70 & 14.06 & 19.52 & 30.12 & 33.14 & 45.55 & 45.55 & 172.76 \\
16 & Xianju District/Xiage & 9 & 14.71 & 2.83 & 22.80 & 41.65 & 32.56 & 7.67 & 41.65 & 183.03 \\
17 & Xianju District/Qushan & 7 & 11.15 & 5.79 & 18.41 & 10.51 & 26.26 & 44.24 & 44.24 & 296.69 \\ \hline \hline \end{tabular} Note: Simulated wind speed data of case 1 to case 5 were verified by stations M1 to M5, respectively; \(v_{\rm 50}\) denotes the design wind speed of a 50-year return period estimated by statistical analysis on the observed extreme wind speed data; \(v_{\rm s}\) denotes the simulated maximum wind speed in five cases.  
\end{table} 
Table 8: Comparison of the simulated and reference wind speeds at the 17 meteorological stations in Taizhou City. where \(v\) is the 50-year return period mean extreme wind speed, and the air density can be calculated as:  
\[\rho=0.00125e^{-0.0001z} \tag{10}\]  
where \(z\) is the altitude of the observation station. It can be seen from Table 9 that the reference wind pressure of the four stations in Jiaojiang District was calculated to be around 0.5 kN/m\({}^{2}\). The locations of these four Jiaojiang stations are close to the same natural environment. Therefore, the estimated reference wind pressures of four Jiaojiang stations were all close to the 0.55 kN/m\({}^{2}\) given in the Chinese code [33]. The reference wind pressures for stations in Wenling ranged from 0.39 kN/m\({}^{2}\) to 0.81 kN/m\({}^{2}\) based on the simulated mean extreme wind speed of each case.