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Hydraulic Model Development and Calibration <br />City of Redwood City (0011239.02)2-15 Woodard & Curran, Inc. <br />Sanitary Sewer Capacity Master Plan November 2023 <br />fall to a flow hydrograph for each subcatchment based on the RTK values for the flow meter area in which that <br />subcatchment is located. <br />For this Master Plan, characteristic RDI/I flow parameters were developed for each flow meter area based on calibration <br />of model flows to actual flow data recorded for the wet weather period in January and February 2019 and early March <br />2016 for the Redwood Shores and Seaport/Pacific Shores pump station monitoring. Model calibration is discussed in <br />the following section. <br />Figure 2-11:RDI/I Hydrograph Components <br />2.4 MODEL CALIBRATION <br />Model calibration is the process of comparing model-simulated flows to monitored (observed) flows and adjusting model <br />parameters until a reasonably good match is achieved. During calibration, it is not expected that every meter match <br />flow data at all times, but most meters should reasonably match the flow volumes and peak flows. Model calibration is <br />achieved first through comparison of modeled versus metered flows during a dry weather (non-rainfall) period to achieve <br />an accurate prediction of BWF and GWI, then during the wet weather period to estimate RDI/I response. <br />ATTY/RESO.0077/CC RESO SEWER SYSTEM MANAGEMENT PLAN - EXHIBIT A <br />REV: 07-14-25 LF <br /> <br />Page 131 of 317