Advantages of a Hydraulic Saint-Venant Type Model with Pressure-Dependent Leakage
Publication: Water Distribution Systems Analysis 2008
Abstract
Losses from water distribution systems are reaching alarming levels in many towns and cities throughout the world. Leakage represents a large part, frequently more than 30 %, of the water supplied. One of the major factors affecting leakage is pressure in distribution systems. Consequently, it is important to model the hydraulics of water distribution systems with pressure-dependent leakage included. The objective of this paper is to present and validate an improved formulation of the hydraulic network equations that incorporates pressure-dependent leakage. Particular effort has been made to assess the magnitude of the different terms in the equations, including leakage, inertia and head loss. Moreover, a comparison with an extended period simulation model is performed to determine the impact of pressure-dependent demands. The formulation was derived from the Navier-Stokes equations. A system of partial differential equations is solved using a finite-difference method. The feasibility of this method and efficiency of the proposed algorithms are illustrated using a number of case studies.
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Copyright
© 2008 American Society of Civil Engineers.
History
Published online: Apr 26, 2012
ASCE Technical Topics:
- Continuum mechanics
- Dynamics (solid mechanics)
- Engineering fundamentals
- Engineering mechanics
- Equations (by type)
- Hydraulic engineering
- Hydraulic models
- Hydraulic networks
- Hydraulic pressure
- Hydraulic properties
- Hydraulic structures
- Infrastructure
- Mathematics
- Models (by type)
- Navier-Stokes equations
- Pipeline systems
- Pipes
- Pressure (type)
- Pressure distribution
- Pressure pipes
- Solid mechanics
- Water and water resources
- Water leakage and water loss
- Water management
- Water pressure
- Water supply
- Water supply systems
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