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INTRODUCTION TO EPANET 2.0 Susana Ochoa Rodríguez ([email protected]) Research Assistant Urban Water Research Group (UWRG) 28 th February 2012
INTRODUCTION TO EPANET 2.0
Susana Ochoa Rodríguez ([email protected])
Research Assistant
Urban Water Research Group (UWRG)
28th February 2012
Contents
1. Introduction
2. Interface: general features and definitions
3. Network: components and set-up
4. Simulation and results
5. Import / Export a network
1. Introduction
Software that models the hydraulic and water quality behavior of water distribution
piping systems
• It does not design a water distribution network
• Available (public domain) at: http://www.epa.gov/nrmrl/wswrd/dw/epanet.html
• The User’s Manual can be downloaded from the same web site
2. Interface
• Area of study (min, max coordinates)
View
2. Interface
• Symbols to nodes, pipes, etc.
(right click on working space and select “Options)
2. Interface
• IDs and labels for network components Project > Defaults Double click on one component
For consecutively labelling
2. Interface
• Simulation units / equations (head loss)
US Customary units apply when CFS,
GPM, AFD, or MGD is chosen as flow
units.
SI Metric units apply when flow units
are expressed using either liters or
cubic meters.
Project > Defaults
The use of SI units is mandatory
at ICL
3. Network - Components
• Nodes
• Junctions (X, Y, elevation, demand, etc.)
• Reservoirs (X, Y, total head, etc.)
• Storage tanks (X, Y, elevation, initial level, max and min
level, shape/diameter, etc.)
• Pipes (length, diameter, roughness coefficients, etc.)
• Other:
• Pumps (start/end node, curve)
• Valves (start/end node, diameter, type, settings, etc.)
3. Example – Network map
(EPANET 2.0 tutorial)
3. Network – Adding new components
Use “Map” toolbar
Alternatively, you can use the
“New” button in the browser
3. Example – Properties of nodes and pipes
Node
Id
Elevation
(feet)
Demand
(gpm)
1 (Res) 700 0
2 700 0
3 710 150
4 700 150
5 650 200
6 700 150
7 700 0
8 (Tank) 830 0
Pipe
Id
Length
(feet)
Diameter
(inches)
1 3000 14
2 5000 12
3 5000 8
4 5000 8
5 5000 8
6 5000 10
7 7000 6
8 5000 6
Roughness Coefficients (C-Factors) = 100
Nodes Pipes
3. Properties of network’s components
Double click on network component
Alternatively, select element in “Browser”
and click here
3. Properties of network’s components
By pressing the F1 key when the “properties”
windows is open, you can get a full description of the
component’s properties
3. Network – Modifying Components
Moving nodes
Moving vertex of pipes
3. Example – Pump properties
Pump curve
• Pump’s design flow = 600 GPM
• Pump’s design head = 150 ft
• By providing one point of (flow, head), a pump curve will be
automatically completed.
3. Example – Pattern for variable demand
1
2
3
4
5
4. Simulation and results
Simulation parameters • Hydraulic Head (nodes)
• Velocity (pipes)
• Pressure (nodes)
• Water quality (nodes, pipes)
• Headloss (pipes)
• flow rate (pipes)
• Friction factor (pipes)
Visualisation of simulation results • Data tables
• Time series graphs (single and extended period analysis)
• Colour coded network maps
4. Visualisation of results
4. Visualisation of results
4. Extended period analysis results
4. Contours (e.g. Pressure)
97.14
61.67 56.92 51.02 44.81
43.35
41.61
40.2339.20
37.64
34.2130.01
35.5233.7231.30
33.41
49.93
55.09
50.61
41.26
36.10
44.52
38.93
35.34 31.70 30.76
38.9430.13
30.42
30.70 33.18
0.00
Pressure
25.00
50.00
75.00
100.00
m
Day 1, 12:00 AM
Pressure Surface - Source: REDES Software (Ciacua, 2009)
5. IMPORT/EXPORT network
Importing a network
• From a text file (conversion from CAD or GIS systems)
Exporting a network
• To CAD format (*.dxf)
• As *.inp, which can be imported to other simulation
software
