Lecture 2 - Water Distribution System Flashcards
The purpose of water distribution are?
- To supply the system’s users with the amount of water demanded
- To supply this water with adequate pressure under various loading conditions
3 major components of WDS
- pumping stations
- distribution storage
- distribution piping
Connect system components and are the main distribution links throughout the network
Pipe sections
They are the most abundant elements in the network
System components
Refers to either end of a pipe
Nodes
Two categories of nodes
- Junction nodes
- Fixed-grade nodes
Regulates the flow or pressure in water distribution system
Control valves
The most common type of control valve is? Which is placed at pressure zone boundaries to reduce pressure
Pressure-regulating valve PRV
It is needed to equalize pump discharge near an efficient operation point in spite of varying demands, to provide supply during outages of individual components, to provide water for fire fighting, and to dampen out hydraulic transients
Distribution system storage
The ____ the pump discharge, the ____ the pump head becomes.
Higher — lower
It is used to increase the energy in a water distribution system.
Pumps
Types of pumps
- Positive-displacement pumps
- Kinetic pumps
- Turbine pumps
- Horizontal centrifugal pumps
- Vertical pumps
- Horizontal pumps
House the pump, motors and the auxiliary equipment
Pumping stations
______ of water mains involves a wide array of metering devices for flow measurement.
Metering
It is an empirical formula which relates the flow of water in a pipe with the physical properties of the pipe and the pressure drop caused by friction.
Hazen-Williams Equation
