Toxic Contaminant Fate and Transport
In many places in the world, toxic substances such a pesticides, heavy metals, PAHs and PCBs are a concern in surface waters and sediments. EFDC+ supports sophisticated toxics modeling capabilities with the improved accuracy of 3D transport fields in a highly accurate numerical transport scheme. EFDC+ provides you with the tools to determine the long and short-term concentration distribution of these substances in the waterbody and sediment bed.
Single Coupled Model
EFDC+ simplifies the construction, calibration and scenario analysis of a toxics model by providing a fully coupled simulation. There is no need for you to have to generate and manage interface files along with reducing linkage file errors. With the EFDC+ multi-threaded capability, the historic criticism of coupled models being too slow no longer applies.
EFDC+ has no limit to the number of toxic substances that may be simulated at one time. Each toxic substance being simulated in EFDC+ can individually use 1, 2 or 3 Phase Partitioning with optional organic carbon specification.
SEDZLJ Toxics Model
Developed by Sandia National Lab, SEDZLJ is an improvement on previous models because it directly incorporates site-specific erosion rate and shear stress data, while maintaining a physically consistent, unified treatment of bedload and suspended load. EFDC+ has extended the sediment transport capability of the SEDZLJ model with EFDC+’s robust toxics model.
Decay and Other Losses
In addition to bulk toxic decay, EFDC+ has added the ability to simulate biodegradation in the water column and the sediment bed and volatilization at the water surface.
Non-Cohesive Bedload Transport
EFDC+ has added the ability to simulate toxics transport, due to bedload, for both the original sediment transport module and the SEDZLJ module.