Method for assessing the impact of rainfall depth on the stormwater volume in a sanitary sewage network

Abstract Sanitary sewage network is relatively rarely considered as the cause of urban floods. Its hydraulic overload can result not only in flooding, but also sanitary contamination subcatchments. Stormwater main reason for this overload. In contrast to stormwater or combined sewer system, these waters infiltrate into an uncontrolled way, through ventilation holes covers structural faults and lack tightness manholes. Part infiltrates soil, where it leaks pipelines. This greatly hinders assessing quantity influent system. Standard methods finding correlation between rainfall intensity flow are ineffective. confirmed, i.a. by studies performed existing network, presented paper. Only when residuals analysis was using ARIMA ARIMAX methods, authors were able develop a mathematical model enabling assess influence depth on effluent from network. Owing possibility forecasts, developed enables prepare local water sewerage companies occurrence floods well wastewater treatment plants.