DSI EFDC V10.3
A state-of-the-art open-source multifunctional surface water modeling engine, including fluid dynamics, sediment pollutants, and eutrophication components, aimed at simulating one-dimensional, two-dimensional, and three-dimensional aquatic systems. Based on the Environmental Fluid Dynamics Code (EFDC) originally developed by Dr. John M. Hamrick in the late 1980s, DSI's EFDC+has become the gold standard for water system modeling.

EFDC+is the core software for fluid dynamics modeling.

ENVIROMENTAL environment

FLUID fluid

DYNAMICS DYNAMICS

CODE code

Enhanced version: EFDC+

Environmental Fluid Dynamics Code Enhanced Edition (EFDC+) is a general-purpose modeling software. Simulate one-dimensional, two-dimensional, and three-dimensional flow, transportation, and biochemical processes of surface water systems (rivers, streams, lakes, estuaries, coastal waters, and open oceans)

The Virginia Institute of Marine Sciences developed the initial version of EFDC software, which is a public domain modeling software with functions equivalent to:

-POM/ECOM

-CH3D-WES

-TRIM/UntRIM

-MIKE21/3

-Delft3D

EFDC+is an enhanced and optimized version developed by DSI


Overview of EFDC+Features


fluid dynamics

EFDC+is the latest enhanced version of EFDC, which is one of the most popular 3D fluid dynamics and water quality models. The US Environmental Protection Agency (EPA) described the initial EFDC as "a state-of-the-art fluid dynamics model that can be used to simulate one-dimensional, two-dimensional, and three-dimensional aquatic systems. Over the past two decades, it has developed into one of the most widely used and technically reliable fluid dynamics models in the world." DSI adopted the EPA version of EFDC and made significant improvements to it, creating EFDC+. Since 1998, DSI has continuously improved the fluid dynamics and stability of the model while reducing operating time.

>Temperature

Water temperature is one of the most important physical properties of surface water, which affects the density effect and thermal effect on water quality dynamics and solubility. EFDC+provides you with a series of options to accurately simulate surface heat exchange and solar radiation attenuation in the water column. Multiple calculation evaporation options can be used to better represent your system.

>Salinity

The impact of salinity changes on estuarine stratification is often greater than temperature changes. In hundreds of studies, EFDC+has been proven to successfully predict the response of rivers and estuaries to changes in ocean salinity, which are related to seasonal changes in freshwater inflows and human activities such as deepening of ports and waterways.

>Hydraulic structures

To realistically simulate actual physical conditions, you may need to consider artificial structures such as bridges, gates, culverts, pipelines, and/or weirs. Using EFDC+, you can simulate these structures using standard lookup table methods, or utilize enhanced EFDC+functionality, which uses standard hydraulic equations for typical hydraulic structures to calculate appropriate flow rates for each time step.
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