Calculation of Dry Weather Flows in Pumping Stations to Identify Inflow and Infiltration in Urban Drainage Systems

The performance of most urban drainage systems is adversely affected by unintended connections groundwater and surface water, often denoted as inflow infiltration (I&I). Various methods exist to locate characterise these effects. Yet, it remains difficult quantify them accurately, especially in terms spatial distribution over a larger area. One the reasons for this lack sufficient high-quality sewer flow measurements at high temporal resolution, which would enable calibration detailed spatio-temporal relationships between rainfall I&I flows. In paper, methodology presented deriving time series from operational pumping stations, results four pilot locations are discussed. It shows potential be implemented large scale contribute better understanding remediation management planning.