Introduction to the WaterCAD Program

1 Introduction to WaterCAD Page 1 ECIV 362 Introduction to water Resources Engineering, Department of Civil and Environmentl Engineering, University of South Carolina Introduction to the WaterCAD Program This semester, you will use the WaterCAD Program by Haestad Methods, Inc., to accomplish a project wherein you analyze a water distribution system to identify problem areas and evaluate a number of potential remedial actions. This handout was prepared to provide guidance to learning how to use the Program . Step-by-step instructions, augmented by screen captures, will guide you through the solution of the following problem.

2 Example Problem Given the water distribution network shown in the following schematic. This system has 9 pipes, 6 nodes, and 2 supply tanks. The demands at junctions J-3, J-5 and J-6 are 150, 200 and 150 gpm, respectively. Pipe data are summarized in the table following the schematic drawing. The water surface elevation (HGL) is 135 feet in tank T-1 and 140 feet in tank T-2. (a) Determine the magnitude (gpm) and direction of flow in each pipe. (b) Determine the HGL (feet) and pressure (psi) at each node. Pipe No Length (feet) Diameter (inches) CHW P-1 3000 12 140 P-2 3500 8 130 P-3 3500 8 130 P-4 2500 8 130 P-5 3500 6 110 P-6 3500 6 110 P-7 2500 6 110

3 P-8 2500 6 110 P-9 4000 12 140 Introduction to WaterCAD Page 2 ECIV 362 Introduction to water Resources Engineering, Department of Civil and Environmentl Engineering, University of South Carolina Getting Started Start the Program according to instructions provided in class. After the Program has started, you will see the following start-up dialog. Select Create New Project. This will result in the second dialog where you provide a file name.

4 Give the file name as Example Problem (or whatever name you desire) and click Save. WaterCAD will display screens for four setup wizards. The first allows you to provide a project title and enter the name of the project engineer. These will appear in the title block of hard-copy output. After you have entered this information, click Next in the lower right corner of the dialogue. The second allows you to select the friction method, type of liquid, and various input modes. Please note the default friction method and input modes. For most applications, you will accept the defaults.

5 Click on Next. Use the third setup wizard to indicate the drawing mode and specify symbol and text size. Indicate you will be using schematic drawing scale. You would use the scaled drawing only if you import a *.dxf or GIS shapefile as the background drawing onto which you draw the pipe network. Click Next. The fourth setup wizard allows you to specify data that is common to all pipes, nodes, pumps, tanks, etc. through the prototypes. You would use this if all of the pipes have the same diameter or Hazen-Williams coefficient. For this example, there is no prototype data.

6 Click Finished. Introduction to WaterCAD Page 3 ECIV 362 Introduction to water Resources Engineering, Department of Civil and Environmentl Engineering, University of South Carolina Creating the Network Use the pipe tool in the palette on the left side of the screen to lay out the network. Click on the pipe tool and drag the cursor onto the blank screen. Note the cursor is displayed as a plus (+) with an circle next to it. The circle is the symbol for a node. To remain consistent with the network as defined in the problem statement, begin your drawing with tank 1.

7 To switch from the junction symbol to the tank symbol, right click and select tank from the drop-down menu. The symbol now changes to the tank system. Position the cursor where you wish to locate the tank and right click. Drag the cursor to the position of the first junction, right click and select the junction symbol. Left click to locate the junction. Note the Program automatically numbers each element. Pipe tool Introduction to WaterCAD Page 4 ECIV 362 Introduction to water Resources Engineering, Department of Civil and Environmentl Engineering, University of South Carolina Continue to layout the system as specified in the problem statement.

8 Entering Data Now you need to enter the data for each tank, pipe and junction. You may do this using tabular reports or by double clicking on each element and using the corresponding dialogue. Both approaches are illustrated. It is best to use the dialogue to enter tank data. Assume each tank is cylindrical, 30 feet high, with the stated HGL corresponding to a 50% full tank. Double click on tank T-1 and select the Section tab dialog. Give data for tank diameter of 30 feet, maximum and minimum elevations of 150 and 120 feet, respectively, and initial elevation of 135 feet.

9 Edit tank T-2. Give it a diameter of 30 feet and maximum, minimum and initial elevations of 155, 125 and 140 feet, respectively. Tabular reports Introduction to WaterCAD Page 5 ECIV 362 Introduction to water Resources Engineering, Department of Civil and Environmentl Engineering, University of South Carolina It is easiest to use Tabular Reports to enter the pipe and junction data. Click on the tabular report button on the menu bar. Highlight and double click Pipe Report (or highlight and click OK). Edit the pipe data directly on the table just like you enter data into any spreadsheet.

10 Click Close when you have finished. (Note: WaterCAD screens from this point forward in this handout were taken from an earlier version of the Program . At most, there are only minor differences between these images and what you see with WaterCAD ) Introduction to WaterCAD Page 6 ECIV 362 Introduction to water Resources Engineering, Department of Civil and Environmentl Engineering, University of South Carolina To enter junction demand and elevation data, again use the tabular reports. Highlight and double click Junction Report. Enter data as shown below.