INTRODUCTION TO EPANET 2.0

Susana Ochoa Rodríguez (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 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

Questions?

Susana Ochoa Rodríguez

s.ochoa-rodriguez@imperial.ac.uk