Operational calibration and modeling of a water distribution system for a water conservation program: a case study

The potable water distribution system hydraulic model described in this project is in Placer County and was developed to evaluate future Water Conservation Programs (WCP). In the order to complete this goal, the hydraulic model was assembled and then calibrated using an operational calibration. The model is comprised of pipes, junctions, pumps, pressure reducing valves, and tanks/reservoirs. The model is supported by information from a Supervisory Control and Data Acquisition (SCADA), and the calculation of water demand, water production, and the diurnal curve. The model aimed to replicate the behavior of many of the facilities such as tank levels, flow in pipes, and pressure in valves that were collected in SCADA; however, it is recommended to follow up with a field calibration to correct some inconsistencies in the model’s results for a few facilities. The model helped to evaluate future dynamics of tank levels, flows in the pipes, and pressure, velocities, and water age in the system due to water conservation programs. The hydraulic parameters above mentioned changed due to less water demand, and the settings in valves must be changed to maintain the network in operational conditions. Overall, the results of water conservation programs in summer season that reduce water demand are encouraging because they show that water age issues improve after the implementation in most of the pressure zones. Minimum pressure in nodes under 35 psi are higher after the water conservation programs take place because tank levels are higher, raising the hydraulic gradient line (HGL).