EPANET Calibrator Manual [PDF]

Zitiervorschau

EPANET CALIBRATOR

8/25/2008

User Guide Developed by ABE, N. and CHEUNG, P. B. (2008)

Epanet Calibrator

Table of Contents 1 GETTING STARTED ........................................................................................................... 2  1.1 Overview of Epanet .........................................................................................................................2  1.2 Installing ..............................................................................................................................................2  1.3 System Requirements ........................................................................................................................2  1.4 Support................................................................................................................................................2  2 USING THE EPANET CALIBRATOR.................................................................................... 3  2.1 Components ........................................................................................................................................3  2.2 Creating groups ................................................................................................................................3  2.3 Inserting observed data...................................................................................................................5   2.4 Calibrating .........................................................................................................................................6 

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Epanet Calibrator

Epanet Calibrator USER GUIDE

1 GETTING STARTED This user guide describes Epanet Calibrator Desktop Edition software created by Resan Team. It contains basic information about setup and use of the software. Epanet Calibrator minimizes the difference between estimated and observed data (pressure and flow) changing the values of roughness and leakage coefficients. This guide is not an Epanet tutorial and you need some basic Epanet skills in order to use this program.

1.1 Overview of Epanet Developed by EPA's Water Supply and Water Resources Division, EPANET is software that models water distribution piping systems. It is a Windows 95/98/NT/XP program that performs extended-period simulation of the hydraulic and water quality behavior within pressurized pipe networks. Pipe networks consist of pipes, nodes (pipe junctions), pumps, valves, and storage tanks or reservoirs. EPANET tracks the flow of water in each pipe, the pressure at each node, the height of the water in each tank, and the concentration of a chemical species throughout the network during a simulation period. Chemical species, water age, source, and tracing can be simulated. EPANET provides an integrated computer environment for editing network input data, running hydraulic and water quality simulations, and viewing the results in a variety of formats. These include color-coded network maps, data tables, time series graphs, and contour plots. EPANET is public domain software that may be freely copied and distributed.

1.2 Installing 1. Download the last version of Epanet Calibrator in the official website: http://www.resan.ufms.br/resantools/desktop.zip 2. Extract the downloaded file (desktop.zip) to a nice directory on your local machine. Done!

1.3 System Requirements • • • •

Operating System: Windows 2000, Windows XP, Windows Vista CPU: 500Mhz, Pentium 3 System Memory (RAM): 256MB minimum, 512MB recommended Screen: 1024x768, “16-bit High Color”

1.4 Support Please, send us an email to [email protected] if you have any question we can help with.

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Epanet Calibrator

2 USING THE EPANET CALIBRATOR 2.1 Components The Epanet Calibrator has some additional components listed in the following figure.

1. Information mode: When this button is pressed you can insert observed data. 2. Create Group: Use this button to add a new group. 3. Remote Calibration: Send your INP file with calibration data to our server and receive a calibrated file. 4. Setup: Configure server and authentication parameters. 5. Desktop Calibration: Calibrate Epanet files in your own PC. 6. Validation Button: Click this button to verify if you create the groups properly. 7. Browse groups: Manage your groups in this option. 8. Select region: this button is native from original Epanet. Used to select regions to execute many actions at once.

2.2 Creating groups The first step to run your calibration process is creating groups. Groups are regions with same physical characteristic. For example, if the pipes of your network have two materials, PVC and Iron, you can create two groups.

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Epanet Calibrator

To create a group, click in Select Region Tool and click bounding your region. Right click to finish and close the selection. After make a selection, click in the Create Group button. You can erase your groups clicking in the Browse group button on Resan Tab.

Note: You must include all pipes in your network in some group before start the calibration process.

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Epanet Calibrator

If you attrib the same pipe for more than one group, the Epanet calibrator will consider it an element of the first group created.

2.3 Inserting observed data To insert observed data, press the information button. You will be able to insert your data. Double click in a node or pipe component. Insert your observed data (Pressure (mH20) for nodes or Flow (L/s) for pipes). You can also load the data from a CSV (Comma separated values). The format of the file is hour, value. One per line. E.g.: 1,20 2,22.5 24,15.22 In this example, you will load the value 20 for the first hour, 22.5 to hour 2 and 15.22 to hour 24 to a specific node. The other values will be unavailable for this example.

Note: Set the Total Duration of your simulation to 24h in Data->Options->Times.

Leave the field blank if you don’t have information for a specific time. Click in Save button to continue.

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Epanet Calibrator

2.4 Calibrating After insert your observed data and created the groups, you can start the calibration process.

Note: Don’t use your .NET file. Export your Network to .INP before continue.

Click in the Desktop Calibration button. A Window will be open with some genetic algorithms parameters.

• • •

Initial population: This number will depend of the size of your network. Mutation probability: probability of generate a random value to improve the optimization Crossover probability: probability of a selected chromosome surviving to the next generation

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Epanet Calibrator

•

Generations: number of iterations.

Click in OK Button to start. When the calibration window closes, it will create a new file called calibrated.inp in the same directory of your saved network. That’s it! Just open your new file and test your new calibrated network file.

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