EEMS 12.4 Release Notes 12.4
2025-08-27
EFDC+ Explorer
Fixed Bugs
- Fixed issues with biota growth factor and density displays (2DH, TS, LP).
- Fixed the incorrect density growth factor time series.
- Fixed ‘Save As’ model issue.
- Fixed crash when generating VP output files.
- Fixed crash when creating polygons from selected cells.
Improvements / Updates
- Improved Polyline and Polygon editing (added tools and keystroke support, better validation for editable layers, improved IsValidPoly_SelectedID checks).
- Improved Overlay layer display.
- Improved bitmap capture (refactored getbitmap) for exporting graphics and videos.
- Improved Run Log and model logging.
- Improved cell information and tooltips.
- Updated coordinate system reporting format.
- Updated extraction of solar radiation at the cell bottom.
- Added Plant Density half-saturation for the crowding option.
- Enabled Velocity Limitation options.
- Updated calibration plotting.
- Updated network connectivity check to use msftconnecttest.
- General code cleanup (removed commented and unused code).
EFDC+
Fixed Bugs
- Corrected the reading function of swan.grp input file for models using SWAN as the external wind-wave model.
- Fixed the vertical distribution of wave dissipation in the wind-wave model
- Fixed the issue of the use of the ammonia preference variable in the Water Quality model. In previous EFDC+ versions, the ammonia preference was always assigned the value of the first algae group, regardless of the number of simulated groups.
- Fixed the interpolation of the velocity value at cell faces in SGZ models
- Fixed the issue of water flux in dry cells at one time step back
Improvements / Updates
- Update SEDZLJ PERSED mass balance checking in the sediment transport model
- Update Horizontal Diffusion Momentum Flux (HDMF) - Added flags (= 0 or 1) to adjust the HDMF calculation for cells located at corners and near wall regions.
- Update the calculation of the External Density Gradient (EDG) in SGZ models - Updated the implementation to use a more appropriate method for determining bottom elevation and water depth between adjacent cells, as well as buoyancy values at cell faces.