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# Hydraulic Modeling of Water Distribution Systems - PowerPoint PPT Presentation

Hydraulic Modeling of Water Distribution Systems. Grady Hillhouse M. Eng. Water Resources Engineering Texas A&M University. Introduction. A large percentage of EWB projects involve water. Many of these project include a transmission or distribution component.

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### Hydraulic Modeling of Water Distribution Systems

M. Eng. Water Resources Engineering

Texas A&M University

• A large percentage of EWB projects involve water.

• Many of these project include a transmission or distribution component.

• A basic understanding of pressure conduit hydraulics is essential when designing water infrastructure.

• In situations where solving pipe networks is too complex, modeling becomes necessary.

• Introduction to pressure conduit hydraulics

• Introduction to EPA NET

• Basics of Modeling

• Only an introduction

• If you have questions, ask!

• Summed up in two equations:

constant

Demand

• Continuity at nodes

• Loop Equations

• Total energy less velocity head

• Public domain (free!)

• Relatively simple

• Uses the gradient method to solve pipe networks for flows and pressures.

• Node – junction between other model elements. Can have external demands.

• Pipe – convey water between nodes.

• Reservoir – infinite source of water with a constant or periodically changing water surface elevation.

• Tank – stores water . Water surface is at atmospheric pressure.

• Pumps – impart energy to water

• Valves – various methods of controlling flow or pressure

• Depending on the complexity of the system you’re modeling, in may benefit you to simplify the model.

• Layout and parameters of infrastructure

• Demands

• Initial conditions

• Flow rates in pipes and tanks

• Pressures at nodes

• A model is only as good as the input data you provide.

• Reference the user’s manual!

• Never ask the model to do something you don’t understand.

• Always verify results by checking with hand calculations.

• Questions?