||Mathematical Modeling of Water Distribution Systems.
Gilma, Harold D. ;
Goodma, Maurice Y. ;
Metkowsk, Renette V. ;
||General Electric Co., Philadelphia, Pa. Re-entry and Environmental Systems Div.
||GE-71SD241; DI-14-31-0001-3162; OWRR-C-1725(3162); 00715,; C-1725(3162)(1)
( Water distribution ;
Systems engineering) ;
( Water pipelines ;
Mathematical models) ;
Management methods ;
Real time operations ;
Computer programming ;
Pipe flow ;
Pressure control ;
Automatic water distribution systems
||Most EPA libraries have a fiche copy filed under the call number shown. Check with individual libraries about paper copy.
The major objective of the research was to develop a model suitable for simulation and study of real-time control of typical water distribution systems and eventual implementation in a process control computer. A unique approach was developed using an 'inverse solution' to track flow conditions in the field using a limited number of pressure and flow measurements. It uses a network model to iteratively adjust pipe flows to force agreement between calculated and measured pressures; total demand for the model is fixed by the measured pump and tank flows. The model is then used to simulate and evaluate the application of various control alternatives. A demonstration test case was run showing how this approach can be used to control pressure by turning available pumps on/off. The study also included a literature survey, convergence acceleration methods for calculating a network balance, sensitivity of the 'inverse solution' to model data uncertainties, and a compilation of guidelines for water distribution control. IBM 360 Fortran IV source program listings, sample test cases and instructions for using the program are included.