Reduce the Curve Number to 60 and see what happens. Now you’ve done the hard work, lets have some fun! Which you can pick out the peak discharge of the outflow hydrograph. Which you can determine the total precipitation, losses, and amount of excess Go to the Basin Model display, right click on Subbasin-1 and select View Results Graph Lets enter the specifications as shown belowĭefines the time period of the simulation and the time interval within that atĪfter this rather laborious process of specifying all the input information, weĪre now ready to do a simulation run. Last thing that we need to specify is the Control Lets go back to the Meteorologic Model and link the Specified Hyetograph to Lets add the precipitation in the Table view,Ĭannot enter anything into the first time interval 00:00 Time shown here in 2012 is arbitrary and you can just as easily use 2013. You save those choices, you’ll be able to edit the Time Window: We’ll create an artificial one since we don’t yet have actual gage Now lets specify our Hyetograph at a gage. Model know that we are applying this meteorology to the Subbasins in this But, first, lets used the Basins tab to let the Meteorologic Hyetograph method and put some rainfall in associated with a gage. When you return to the main HEC-HMS screen, you’ll see a Met 1 component Select None as the Baseflow MethodĬreate a new Test Precipitation called Met Make the area of Basin 1 to be 10 square miles, and select the SCS Curve Number and SCS Unit Hydrograph as the Loss MethodĪnd Transform Method options. To define the properties of your Subbasin. If you expand your Basin 1 model icon, you’ll find you’ve now got some options Window, you’ll be able to create a new Subbasin: If you mouse over them, you’ll see what kind of element each one is.
Particular, there are on the top line, a series of Basin Elements If you click on Basin 1, you’ll see lots of When you look back at your HEC-HMS main interface, you’ll see that the Test project now has an entry for Basin Models and if you expand that, You should enter a short description of this In this project, lets start with the Basinįor which the default name is Basin 1. You can name it as you wish), and select a Unit System for the project as US Customary Units (the default is SI Type in a Name and Description for the Project, select a file location (the one shown in the illustration is arbitrary and Lets build a simple HEC-HMS model to see how this system works. Use the HEC-HMS icon to open the program: Once the program is installed, hit Finish to complete the Installation Wizard.
Install the program, which takes a few minutes:
That allows you to directly open HEC-HMS without accessing your full programs In its default location (I normally just use the default location):ĭecide whether you want a Desktop Shortcut – this puts an icon on your Desktop These conditions before the “I agree to the above Terms and Conditions for Use”Ī Destination Folder for the program files, or just let the program install it
The Primary Download Site and use Run as the option on the resultingĬonditions for Use and you have to scroll down to the bottom of the page of To agree to the Terms and Conditions for Use, as described below.
The first user of the software on one of these machines, and if so, you’ll have You want to work in the LRC, the software is maintained in rooms ECJ 3.302 and The software isĪvailable for Windows, Linux and Solaris machines but not for MacIntosh. That can be downloaded from the Hydrologic Engineering Center at: There is a “Quick Start Guide” at that gives you an overview of the operationĪn appropriate version of HEC-HMS for your operating system. To complete this exercise, you need HEC-HMS version 3.5 Set up and run a simple hydrologic model in HEC-HMSĬomparisons of the results when varying basin model parameters. Physical characteristics of the watershed in HEC-HMS.Īfter completing this exercise, you will be able to This model is produced by the HydrologicĮngineering Center of the US Army Corps of Engineers in Davis, CA, A GIS preprocessor called HEC-GeoHMS isĪlso available from the HEC for creating the basin model describing the
Occurs on them, and the resulting runoff and streamflow that are produced. To describe the physical properties of river basins, the meteorology that HEC-HMS is a Hydrologic Modeling System that is designed