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<br />Chapter 3 Working With HEC-RAS - An Overview <br /> <br />Starting a New Project <br /> <br />The first step in developing a hydraulic model with HEC-RAS is to establish <br />which directory you wish to work in and to enter a title for the new project. <br />To start a new project, go to the File menu on the main HEC-RAS window <br />and select New Project. This will bring up a New Project window as shown <br />in Figure 3.3. <br /> <br /> <br />Figure 3.3 New Project window <br /> <br />As shown in Figure 3.3, select the drive and path that you want to work in, <br />then enter a project title and file name. Once you have entered all the <br />information, press the "OK" button to have the information accepted. After <br />the OK button is pressed, a message box will appear with the title of the <br />project and the directory that the project is going to be placed in. If this <br />information is correct, press the OK button. If the information is not correct, <br />press the Cancel button and you will be placed back into the New Project <br />window. <br /> <br />Entering Geometric Data <br /> <br />The next step is to enter the necessary geometric data which consists of <br />connectivity information for the stream system (Stream Network), cross- <br />section data, and hydraulic structure data (bridges, culverts, weirs, etc.). <br />Geometric data is entered by selecting Geometric Data from the Edit menu <br />on the main HEC-RAS window. Once this option is selected, the geometric <br />data window will appear as show in Figure 3.4. <br /> <br />The modeler develops the geometric data by first drawing in the river system <br />schematic. This is accomplished, on a reach-by-reach basis, by pressing the <br />River Reach button and then drawing in a reach from upstream to <br /> <br />3-4 <br />