


Study with the several resources on Docsity
Earn points by helping other students or get them with a premium plan
Prepare for your exams
Study with the several resources on Docsity
Earn points to download
Earn points by helping other students or get them with a premium plan
Community
Ask the community for help and clear up your study doubts
Discover the best universities in your country according to Docsity users
Free resources
Download our free guides on studying techniques, anxiety management strategies, and thesis advice from Docsity tutors
Material Type: Project; Professor: Brandes; Class: Hydrology; Subject: Civil Engineering; University: Lafayette College; Term: Fall 2005;
Typology: Study Guides, Projects, Research
1 / 4
This page cannot be seen from the preview
Don't miss anything!
HEC-HMS Part 2 CE 421, Fall 2005
The previous handout (HEC-HMS Part 1) covered installing the program and setting up the Basin Model and the Meteorologic Model for your project. This handout covers “Control Specifications”, running the model, and model outputs.
Control Specifications
Under the Component menu, select Control Specifications and then New for setting the control specifications, which are the time parameters for the simulation. A New Control Specifications window will appear will similar boxes as when you created the new Basin Model and new Meteorologic Model. Name it something useful. The directory path should be the same as for your project files. Select OK.
A Control Specifications window will then appear as shown below. Specify the time parameters for the run (start date/time, stop date/time, time interval). Since we are using synthetic 24 hour storms and routing the hydrographs through detention basins (which delays the outflow), the actual dates don’t matter, but run the simulation for at least 3 days. The default date format is 15 Oct 2005 and the default time format is 12:00 (24-hour military style). The time interval determines the time resolution of the output. You should select an interval that is smaller than the smallest sub-basin and reach travel time, and no more than the 0.5-hr interval of the SCS design storm. The time interval shown below may be too long for some applications.
Running a Simulation
To run the simulation, go to the Basin Model page (double-click on Basin Model in the Project Definition page), and then to the Simulate menu.
Use Run Configuration to select the particular components (Basin Model, Met Model, and Control Specifications) by mouse click that you wish to run – give each run a different name and description. Each run can easily be reconstructed by using the Run Manager, which keeps track of all the runs you have performed.
Select Compute under the Simulate Menu (or the C button on the Basin Model page) to run the simulation.
If you have not entered all the required data, the program will give you a “Compute Failed” message, and the message log box will give Errors, and will alert you to which parameters that are missing.