The mixed model for the residential flow demand of a small number of users

The WDS hydraulic performances strongly depend on the users water demand, indeed any hydraulic simulation is doomed to fail in absence of a reliable modeling of the flow request. The paper takes into account the Mixed Model (MM) [1], that has been proposed to predict the water demand for a significant number of users (at least 2 hundred). Herein the MM is instead used to model the water demand of a small number of habitants (10-20). This approach is needed to analyze the phenomenon of null water request, and the relative probability of occurrence has been estimated using real residential water demands. Experimental observations confirm that MM is effective for describing the water demand for few residences.