Hydraulic Network Modeling and Analysis
Krieger & Stewart has developed hydraulic network computer models of each of the systems described below. In each case, development of the models included compilation, review, and analysis of all available information related to the physical system (production, transmission, storage, and distribution facilities) and the distribution of demands (including meter records, community plans and zoning maps, and aerial photography), together with system inspections. The firm used information secured from the records review and system inspections to generate the computer models, then used production and storage level records together with system pressure recordings to calibrate the models; each model was then modified as required to generate results as close as possible to actual system behavior.

Each model was subjected to either steady state or transient conditions, depending on the requirements of the client. Steady state simulations consist of running the model under operating conditions and demands that are constant throughout the operating period being simulated. Transient simulations consist of running the model under the changing operating conditions and demands that the system being modeled has actually experienced (based on available records), and are most often used to identify system deficiencies and/or to evaluate the potential for operating well and booster pumping plants during off-peak energy rate periods. All models were generated using AutoCAD-based CYBERNET software.
 

  Client: Indian Wells Valley Water District
Project:    Domestic Water System Hydraulic
                Network Analysis
The model simulated a system consisting of approximately 230 pipes, 11 well pumping plants, seven booster pumping plants, 11 water storage reservoirs, and five pressure zones. Said system was analyzed for both steady state and transient conditions. The project was completed in 1993, and has been augmented and analyzed several times since.
 
  Client: Rubidoux Community Services District
Project:    Water Supply System Master Plan
                and Wilson Street Interconnection
The model simulated a system consisting of approximately 165 pipes, nine well pumping plants, two booster pumping plants, five water storage reservoirs, and two pressure zones. Said system was analyzed for steady state conditions. The project was completed in 1993.
 
  Client: Coachella Valley Water District
Project:    Domestic Water System
                Hydraulic Network Analysis
The model simulated a system consisting of approximately 960 pipes, 70 well pumping plants, 55 booster pumping plants, 24 reservoirs, and six major pressure zones. Said system was analyzed for both steady state and transient conditions. The project was completed in 1996.
 
  Client: East Blythe County Water District
Project:    Water System Appraisal
                and Master Plan
The model simulated a system consisting of 100 pipes, five well pumping plants, three booster pumping plants, and two water storage reservoirs, and was analyzed for steady state conditions. The project was completed in 1994.
 
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