INTRODUCTION TO EPANET 2.
0
Susana Ochoa Rodrguez (s.ochoa-rodriguez@imperial.ac.uk) 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 Users 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)
Project > Defaults
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.
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
Nodes
Node Id 1 (Res) 2 3 4 Elevation (feet) 700 700 710 700 Demand (gpm) 0 0 150 150
Pipes
Pipe Id 1 2 3 4 5 6 Length (feet) 3000 5000 5000 5000 5000 5000 Diameter (inches) 14 12 8 8 8 10
5 6
7 8 (Tank)
650 700
700 830
200 150
0 0
7 8
7000 5000
6 6
Roughness Coefficients (C-Factors) = 100
3. Properties of networks components
Double click on network component
Alternatively, select element in Browser and click here
3. Properties of networks components
By pressing the F1 key when the properties windows is open, you can get a full description of the components properties
3. Network Modifying Components
Moving nodes Moving vertex of pipes
3. Example Pump properties
Pump curve
Pumps design flow = 600 GPM Pumps design head = 150 ft By providing one point of (flow, head), a pump curve will be automatically completed.
3. Example Pattern for variable demand
4
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)
Pressure 25.00 50.00 75.00 100.00 m
37.64 30.01 34.21
Day 1, 12:00 AM
30.70
33.18
35.34
31.70
30.76
31.30
33.72
35.52
39.20
40.23
30.42 38.93
33.41 41.61
49.93
55.09
43.35
30.13
38.94
44.52
50.61
61.67
56.92
51.02
44.81
97.14 41.26 0.00
36.10
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
Questions?
Susana Ochoa Rodrguez s.ochoa-rodriguez@imperial.ac.uk
