Efficiency Evaluation of Sponge Facility Management and Control Schemes in Urban Blocks Based on Scenario Simulation
To accurately evaluate the prevention and control effectiveness of sponge facilities in water-logging management and to explore the reasonable construction scale of sponge facilities for enhancing urban block rainwater and flood risk management capabilities,a SWMM rainfall-runoff dynamic mod-el was constructed. Multiple return period rainfall scenarios and multi-level control scenarios were de-signed to comprehensively analyze the rainwater and flood risk prevention and control efficiency of sponge facilities. Three research blocks were selected based on historical waterlogging incidents and current waterlogging risk conditions. Green roofs,permeable pavements,rainwater gardens,and grassed swales were used as rainwater control measures. The cross-simulation results of multi-level scenarios were analyzed by comparing the control and drainage relationships of rainfall runoff in terms of control capability decay index and parameter reduction rate,quantifying the rainwater flood risk pre-vention and control effectiveness of each control measure scheme under different rainfall return peri-ods. The results indicate that:① Sponge facility management and control schemes effectively control the waterlogging risk in urban blocks,performing well under low return period rainfall but exhibiting control gaps under high return period rainfall,requiring additional preventive and control measures;② High deployment rate control schemes do not significantly improve the effectiveness of rainwater and flood control,with greater control capability decay for various parameters.
万方数据
维普
