Patent Document ID: 8175859
Application ID: 11777491
Patent Flag: 1

Claim One:
1. A computer implemented method for pressure dependent demand analysis in a model of a water distribution system, comprising: obtaining a model of a water distribution system including pipes and nodes; creating a pressure dependent demand function in which nodal demand changes as nodal pressure changes for use with said model of said water distribution system; creating a scenario to be modeled including assigning said pressure dependent demand function to one or more nodes of said model of said water distribution system; passing scenario information to an associated hydraulic network solver engine and calculating unknown nodal demands for the assigned pressure dependent demand nodes by using a gradient algorithm that includes a diagonal matrix for pressure dependent demand nodes whose elements each indicate an actual supplied demand at a pressure dependent demand node as a function that includes a ratio of actual pressure over reference pressure at said pressure dependent demand node; and passing results computed by said hydraulic network solver engine to hydraulic modeling software and displaying results on a display, for analysis by a user.