Infiltration and inflow (I/I) are critical issues in sewer and drainage systems, often leading to overload and overflow, which will damage the sewage pipeline networks. Excessive I/I will cause sewage overflows, environmental contamination, while also increased treatment costs. Additionally, leakage can cause the hollowing of the soil around the pipeline, causing collapse and damage the pipeline and road surface. Therefore, implementing the diagnosis and analysis of I/I and controlling it in urban sewage systems is crucial for maintaining the effective operation of urban drainage pipeline networks, protecting environmental safety and public health.

Our institute combines monitoring technology to analyze inflow and infiltration (I/I) in urban sewage pipelines. This analysis involves several key tasks below,

• Rational selection of monitoring points and implementation of monitoring plans

• Data validation and filtering to ensure analysis accuracy

• Dry weather inflow analysis to identify sewage discharge patterns and load assessment

• Calculation of rainy day inflow and infiltration (RDII) and its Impact on pipeline load

• Develop and calibrate simulation models to predict I/I volumes based on different rainfall scenarios

• Design and optimization of the I/I analysis monitoring network

• Preparation, reconstruction, correction, and compilation of data for analysis

• Statistical analysis for I/I diagnosis

• Hydraulic modeling and uncertainty analysis of sewage networks