Simulation Analysis of Resilience of Mountain Highway Drainage Systems under Rainstorm Scenario
To elucidate the resilience characteristics of mountain highway drainage systems under rain-storm conditions,the Handan section of the Taihang Mountain Expressway was utilized as a founda-tion.The Chicago rainfall pattern was employed to simulate scenarios of heavy rain with various re-turn periods,and a rainfall runoff simulation model for mountainous highways based on the SCS mod-el was developed.A method for calculating the flood resilience index(FRI)of mountain highway drainage systems was proposed,and the impact of 2-hour cumulative rainfall on the resilience of mountain highway drainage systems was analyzed from three dimensions:response,resistance,and recovery.The findings indicate that the minimum performance of the mountain highway drainage sys-tem occurs at 60 minutes,coinciding with the arrival of the peak flood in the catchment area.As the return period of rainfall increases,the system's performance diminishes gradually,and the system's resilience also decreases.The rate of change in performance is negative during the system's response phase,and positive during the recovery phase.Under different heavy rain scenarios,the negative ex-treme values of the performance change rate consistently exceed the positive values.The resilience characteristics of the system exhibit linear and high-order polynomial decay during both heavy and ex-treme rainstorm processes,with correlation coefficients R2exceeding 0.995.
road Engineeringflood resilience indexmountainous highwaydrainage systemrainfall return period
万方数据
维普
