## 4 Results Analysis
### Analysis of Calculation Results  
Figure 4 and Table 5 show the calculation results and distribution of the prevention and control zones of flash flood threat areas in Yunnan Province. The calculation results were analyzed as follows.  
\begin{table}
\begin{tabular}{c c c c c} \hline \multirow{2}{*}{**City Name**} & **Highest-Risk** & **High-Risk** & **Dangerous** & **Total** \\  & **Area** & **Area** & **Areas** & **Areas** & **Total** \\ \hline Kunming & 26,871 (37.39\%) & 21,842 (30.39\%) & 23,149 (32.21\%) & 71,862 \\ \hline Qujing & 261 (1.02\%) & 8585 (33.71\%) & 16,623 (65.27\%) & 25,469 \\ \hline Yuxi & 5802 (15.65\%) & 23,738 (64.04\%) & 7526 (20.30\%) & 37,066 \\ \hline Baoshan & 122 (1.33\%) & 1423 (15.48\%) & 7647 (83.19\%) & 9192 \\ \hline Zhaotong & 2814 (6.20\%) & 12,515 (27.59\%) & 30,036 (66.21\%) & 45,365 \\ \hline Lijiang & 895 (6.20\%) & 5231 (36.22\%) & 8318 (57.59\%) & 14,444 \\ \hline Puer & 5210 (40.09\%) & 3148 (24.22\%) & 4638 (35.69\%) & 12,996 \\ \hline Lingcang & 112 (2.96\%) & 859 (22.70\%) & 2813 (74.34\%) & 3784 \\ \hline Chuxiong & 1444 (9.56\%) & 6186 (40.97\%) & 7470 (49.47\%) & 15,100 \\ \hline Honghe & 283 (2.24\%) & 4434 (35.15\%) & 7898 (62.61\%) & 12,615 \\ \hline Wenshan & 1123 (6.12\%) & 7085 (38.63\%) & 10,134 (55.25\%) & 18,342 \\ \hline Xishuangbanna & 3196 (26.40\%) & 3438 (28.39\%) & 5474 (45.21\%) & 12,108 \\ \hline Dali & 1149 (4.56\%) & 10,381 (41.18\%) & 13,678 (54.26\%) & 25,208 \\ \hline Dehong & 16,962 (64.56\%) & 5625 (21.41\%) & 3688 (14.04\%) & 26,275 \\ \hline Nujiang & 5 (0.11\%) & 2478 (56.78\%) & 1881 (43.10\%) & 4364 \\ \hline Diqing & 1938 (61.15\%) & 863 (27.23\%) & 368 (11.61\%) & 3169 \\ \hline Total & 68,187 (20.21\%) & \
\begin{tabular}{c} 117,831 \\ (34.93\%) \\ \end{tabular} &
\begin{tabular}{c} 151,341 \\ (44.86\%) \\ \end{tabular} & 337,359 \\ \hline \end{tabular}
\end{table}
Table 4: Population affected by flash floods in each city of Yunnan.  
Figure 4: The prevention and control zoning of flash flood threat areas in Yunnan.  
\begin{table}
\begin{tabular}{c c c c c} \hline \hline
**City Name** & \begin{tabular}{c} **Key Prevention and** \\ **Controlled Zoning** \\ \end{tabular} & \
\begin{tabular}{c} **Medium Prevention** \\ **and Controlled** \\ **Zoning** \\ \end{tabular} &
\begin{tabular}{c} **General Prevention** \\ **and Control Zoning** \\ \end{tabular} & **Total** \\ \hline Kunming & 6473.78 & 7998.69 & 5259.14 & 19,731.61 \\ \hline Qujing & 764.84 & 3791.89 & 14,193.02 & 18,749.76 \\ \hline Yuxi & 899.90 & 9009.24 & 18,169.58 & 28,078.72 \\ \hline Baoshan & 863.17 & 6730.18 & 20,090.13 & 27,683.47 \\ \hline Zhaotong & 2649.73 & 3875.16 & 4129.44 & 10,654.32 \\ \hline Lijiang & 53.30 & 7802.36 & 15,172.34 & 23,028.00 \\ \hline Puer & 970.11 & 6335.20 & 24,687.93 & 31,993.24 \\ \hline Lingcang & 957.19 & 3955.37 & 15,315.58 & 20,228.14 \\ \hline Chuxiong & 447.29 & 4257.86 & 18,667.56 & 23,372.70 \\ \hline Honghe & 588.33 & 5948.41 & 7964.48 & 14,501.22 \\ \hline Wenshan & 842.46 & 13,872.69 & 28,945.00 & 43,660.15 \\ \hline Xishuangbanna & 1644.61 & 7805.80 & 19,158.13 & 28,608.54 \\ \hline Dali & 2388.71 & 7126.94 & 21,966.51 & 31,482.15 \\ \hline Dehong & 1549.36 & 7649.20 & 9588.53 & 18,787.09 \\ \hline Nujiang & 3745.60 & 4637.11 & 6030.25 & 14,412.97 \\ \hline Diqing & 4710.99 & 7475.43 & 10,076.05 & 22,262.48 \\ \hline Total & 29,549.35 & 108,271.52 & 239,413.68 & 377,234.56 \\ \hline \hline \end{tabular}
\end{table}
Table 5: Distribution of prevention and control zoning of flash flood threat areas in each city of Yunnan (km2).