Closure to “Efficient Code for Steady-State Flows in Networks”

Abstract

This report describes an efficient computer program for the solution of steady-state flows in water networks. Its features include: (a) The use of Newton's method for solving a system of simultaneous nonlinear equations; (b) a loop-oriented network to reduce the number of equations to be solved; (c) automatic loop numbering that produces a banded sysmmetric matrix with consequent reduction in computer memeory requirements; and (d) the requirement of a minimum amount of input data. The computer program, written in FORTRAN IV, is available upon request.