Integrated EFDC+ modeling platform
The complete modeling package for hydrodynamics, sediment transport, chemical fate & transport, eutrophication, and generic constituents.
Watch a short overview of how the EFDC+ Explorer Modeling System streamlines model setup, calibration, and analysis for complex waterbodies.
The EFDC+ Explorer Modeling System (EEMS) includes EFDC+, EFDC+ Explorer (EE), and Grid+.
EFDC+ is a comprehensive surface water modeling engine built on 20+ years of validated science. It couples 1D/2D/3D hydrodynamics with water quality, sediment transport, contaminant fate, aquatic vegetation, and custom tracers — with publicly available source code and active ongoing development.
A powerful GUI that streamlines the full EFDC+ modeling workflow — from grid setup and boundary condition configuration through calibration, scenario analysis, and results visualization.
Grid+ is an interactive grid-generation tool for hydrodynamic models, enabling users to build high-quality 2D curvilinear orthogonal grids for complex waterbodies — including coastlines, estuaries, and river networks — with precise boundary control and minimal manual correction.
EEMS is the software of choice for water resource modeling for many major environmental organizations in the U.S. and other countries, because of its efficiency, accuracy, and user-friendly features.
EE was designed with the end user in mind. Our GUI eliminates weeks to months of effort determining which input files are needed, file formatting and how to post process model results. EFDC+ allows the user to access the full computing power of multi-core systems, on site clusters or cloud based High Performance Computing (HPC) clusters to run simulations faster than ever. This saves resources and allows the modeler to pursue solutions with confidence.
Our experts have been working with the Environmental Fluid Dynamics Code (EFDC) since its early development and have experienced its problems first hand. We know that accuracy is critical for your projects, so our version of EFDC (EFDC+) has been significantly updated to provide robust, accurate and stable model results. We are constantly improving the capabilities of EEMS to respond to our community’s needs.
We understood from the beginning that our modeling tools must constantly evolve to suit the needs of the modeling community. Over the course of the development process, we have increased processing speeds, expanded capabilities, made computational improvements, and implemented bug fixes. With every release, we continue to improve and update features and functionality in response to user input.
What people are saying
If it wasn't for DSI, I'd still be editing text files and trying to figure out how to plot data.
I have found EFDC+ to be a really fantastic program. It has a really intuitive interface, a nice mesh builder, and great calibration analysis ... Thank you for creating this software. It is definitely worth the investment.
[EFDC+] has saved me tremendous amount of modeling effort, and I'm very excited and grateful to learn that DSI is planning to make it open source and available to the public.
DSI is an engineering, planning, and research & development firm with 30+ years of experience in water resources consulting, providing customers with the expertise and innovation to address unique project needs.
