Water distribution systems (WDSs) are aimed to deliver water from sources to consumers in the required quantities and quality. Pumps in WDSs add energy (head) to the water and can deliver it from lower to higher areas. A pump is characterized by curves that define the relations of the pump's head gain and efficiency with its flow. Modelers use pumps' curves for different tasks such as planning and management, system operation, and maintenance. Manufacturers provide these curves for new pumps. However, due to its operating history, the performance of a pump deteriorates. Namely, its curves decline at an estimated rate of about 1% per year. Once installed, field tests are conducted every few years to determine the pump's curves. Thus, leaving the performance of the pump unmonitored for long periods. In this study, we use the data collected by Supervisory Control and Data Acquisition (SCADA) to derive updated pump characteristic curves. The methodology can be used for fixed-speed and variable-speed pumps, even in cases where some of the data for individual pumps in the pumping station is unavailable.
