Modelling an Intermittent Water Supply
Publication: World Water & Environmental Resources Congress 2003
Abstract
In an Urban water supply scheme the normal mode of supply in a developing country such as India, is of intermittent nature with restricted supply hours to each area. The supply to different areas takes place in rotation. The operating conditions in such a system can be very varied depending on the zonation pattern for rotational supply and duration of supply for each zone. Normally available models of distribution system such as EPANET are mainly applicable for continuous supply. While this as well as other models may also contain a provision for considering pressure dependent consumption, in an intermittent supply system, the network operation may shift from pressure dependent consumption to demand controlled consumption, both in space and time. There are several other modelling issues in intermittent water supply such as the effect of initial filling of pipes in several segments when the supply is started. Field experiments have shown, that it may take even one to two hours for air to be fully vented out from a distribution system, after which the normal modelling conditions will apply. Observations indicate that the Hazen-Williams C value in such a system may be low in the initial period of supply (associated with presence of air packets) and reaches the true value after a period.
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© 2003 American Society of Civil Engineers.
History
Published online: Apr 26, 2012
ASCE Technical Topics:
- Aerospace engineering
- Business management
- Computer models
- Continuum mechanics
- Developing countries
- Dynamics (solid mechanics)
- Ecosystems
- Engineering fundamentals
- Engineering mechanics
- Environmental engineering
- Infrastructure
- Models (by type)
- Motion (dynamics)
- Municipal water
- Pipeline systems
- Pipelines
- Practice and Profession
- Rotation
- Solid mechanics
- Space exploration
- Water (by type)
- Water and water resources
- Water management
- Water pipelines
- Water supply
- Zoning
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