基于水量水质分析的雨水管网状态诊断研究

Study on diagnosis of non-stormwater flow entries into storm drainage system based on flow rate and marker species

针对雨水管网中安装流量计诊断混接困难的问题,建立以在线液位监测为核心的排水管网水力监测方法,并基于检查井液位推求雨水管道的旱季流量。同时结合以水质特征因子为核心的排水管网水质监测方法,采用总氮和电导率分别作为表征生活污水和浅层地下水的水质特征指标,并基于化学质量平衡方程对该系统生活污水和地下水混接比例定量解析,诊断结果可靠。

The identification of non-stormwater flow by flow measurements being hard to implement,a drainage pipe network hydraulic monitoring method was established based on the online water level monitoring of manholes,to calculate dry-weather flow of storm drainage system.Simultaneously,a water quality monitoring method based on marker species was established.Conductivity and total nitrogen were used as markers to indicate groundwater and domestic wastewater into storm drainage system.An apportionment equation for non-stormwater inflows into storm sewer system was put forward based on chemical mass balance model with small closure error,which showed the reliability of the proposed approach.