Dam Break and Flooding
Challenges with Dam Break and Flooding
Flood extents modeling is typically carried out to determine impacts of a dam break scenario. Often operators also need to determine the significance of their dam releases in relation to impacts from natural flood events.
Solutions Provided by EEMS
EEMS allows operators and regulators to build 3D models of river systems and flood plains downstream of their dam and accurately model peak flood levels and time of travel, inundation periods and develop mitigation schemes. A wide a range of 2D, 3D and statistical analysis can be generated from the model output to better illustrate and interpret the results.
Examples of Studies Done with EEMS
EEMS was used to conduct a study of incremental impacts due to an existing hydropower facility and a proposed expansion on the downstream channel.
A related project for a river system in Laos is shown to the right. Here three operational release scenarios at the Powerhouse (PP) of 220, 110 and 0 cms are simulated. At the same time real inflows from the Nam Hai and Nam Hinboun rivers are shown in the timing frames. For this visualization, the minimum inundation depth displayed is 0.165 m and the minimum inundation time is set at 0 hours, however these display options may be manually set but the user.
Download Example EE Models
Download an example model and run with the free EEMS Demo Version.
Use EFDC_Explorer (EE) and EFDC+ to simulate hydrodynamics of a waterbody when time or water level controlled sluice gates or pumps are added. There are four models in this folder: 01_Uncontrolled, 02_Sluice_Time_Series, 03_Sluice_Control_Rules, 04_Pump, whose distinctives are described further below.