EFDC+ Explorer
The graphical interface for building, running, and calibrating EFDC+ models
Overview
User-Friendly
EFDC+ Explorer (EE) was built to make powerful hydrodynamic modeling accessible to the people who need it most. We recognized that EFDC’s complexity was a barrier to broader adoption, so we designed EE to streamline every stage of the modeling process — from data input to calibration.
With EE, there’s no need to spend hundreds of hours manually editing text files, and no requirement for programming expertise or a FORTRAN compiler. An intuitive, step-by-step workflow lets you focus on the science, not the software.
More Efficient
Before EE, building a hydrodynamic model with EFDC could take one to two years — from initial setup through editing, running, and calibrating.
EE changes the equation. With streamlined input tools, automated consistency checks, and significant processing speed improvements, modelers can now develop a fully calibrated, complex model in as little as one to two months. That’s not just a productivity gain — it’s a transformation in how environmental modeling projects are scoped and delivered.
Fully Supported
Environmental hydrodynamic models carry real-world weight — used globally to predict environmental events, inform regulatory decisions, resolve legal disputes, and guide complex water quality solutions. The stakes are high, and we take that seriously.
With every release, DSI delivers faster processing speeds, expanded analysis tools, new sub-models, and rigorous bug fixes — all driven by feedback from our user community. When you rely on EFDC+, you can count on a team actively invested in keeping the software current and responsive to your needs.
History
EE has its roots in a practical problem: DSI needed a better way to build and calibrate EFDC+ models internally. The solution we developed for ourselves turned out to be exactly what the broader community needed.
Originally released as EFDC Explorer over 20 years ago, the software’s capabilities quickly caught the attention of EPA. By 2003, it had been licensed by both EPA Region 4 and the EPA Environmental Research Laboratory in Athens, Georgia. Since then, EE has been in continuous development — evolving alongside EFDC+ into the modern, full-featured GUI it is today: EFDC+ Explorer.
