摘要
以某村镇居民小区内涝防治工程为例,应用SWMM雨水管理模型模拟该小区在多个重现期下雨水系统改造效果,分析雨水管道泄流能力、雨水井最大水深、排放口峰值流量等水力特征;考察增加海绵设施后子汇水区径流量、雨水井最大水深和排放口峰值流量等水力特征,并通过雨水井积水深度随时间的变化曲线分析了雨水井累积雨水量。结果表明:无海绵设施的情况下,改造后雨水管网重现期提升至20 a, GQ32雨水管道泄流能力提升2.70%~22.81%,雨水井最大积水深度下降值为0.024~1.651 m, PFK1水流频率下降4.69%~8.02%,PFK2水流频率下降4.72%~8.12%。增加海绵设施的情况下,改造后雨水井积水深度下降0.020~0.298 m, PFK1峰值流量下降0.051~0.144 m3/s, PFK2峰值流量下降0.043~0.143 m3/s;雨水径流削减率随重现期的增加而减少,最高达28.68%。该研究结果可为村镇居民环境优化提供思路和技术支撑。
Taking waterlogging prevention project of a residential area as an example,SWMM rainwater management model was used to simulate the effect of the renovated project of rainwater pipe system in many multiple return periods,the discharge capacity of rainwater pipe,maximum water depth of rainwater well,peak discharge of drainage mouth and other hydraulic characteristics were analyzed.The hydraulic characteristics such as the runoff in the sub-catchment area,the maximum water depth of the rainwater well and the peak flow of the discharge port after adding the sponge facilities were investigated.The accumulated rainwater in the rainwater well was analyzed by using the curved line integral of water depth of rainwater well with the time.The results showed that the return period of rainwater pipe increased to 20 a under the conditions of no sponge facilities after rainwater pipe renovated,GQ32 rainwater pipe’s discharge capacity increased by 2.70%-22.81%,the maximum water depth in the rainwater well decreased 0.024-1.651 m,the peak flow frequency of PFK1 decreased by 4.69%-8.02%,the flow frequency of PFK2 decreased by 4.72%-8.12%.Under the conditions of adding sponge facilities after the construction,the water depth of rainwater well further decreased 0.020-0.298 m,the peak flow of PFK1 decreased 0.051-0.144 m 3/s,and the peak flow of PFK2 decreased 0.043-0.143 m 3/s.The reduction rate of rain runoff decreased with the increase of return period,the highest value reached 28.68%.This study results could provide ideas and technical supports for the optimization of environment of rural residents.
作者
苏金海
黄鑫
胡昊
范伟
杜建康
韦伟
朱曙光
SU Jin-hai;HUANG Xin;HU Hao(Anhui Shui’an Construction Group Co.,Ltd.,Hefei,Anhui 230601;nhui Key Laboratory of Water Pollution Control and Wastewater Resource,Hefei,Anhui 230601;College of Environment and Energy Engineering,Anhui Jianzhu University,Hefei,Anhui 230601)
出处
《安徽农业科学》
CAS
2023年第6期208-215,222,共9页
Journal of Anhui Agricultural Sciences
基金
合肥市自然科学基金项目(2021015)
涡阳黑臭水体整治与污水处理国家PPP示范项目。
关键词
SWMM
雨水系统改造
海绵设施
积水深度
泄流量
SWMM
Rainwater pipe system’s renovation
Sponge facilities
Depth of water
Water discharge
