EFDC+ has added a robust Lagrangian Particle Tracking (LPT) module that allows you to conduct mixing studies, track releases/discharges, and simulate oil spills. You can simulate any number of particle groups, each with its own properties and any number of particles. The LPT sub-model has two major computational options, one for tracking zero mass particles (traditional particle tracking approach) and another for use in oil spill simulations.
Particle Tracking Simulations
When using EFDC+ for the simulation of zero mass particles, you have the option of defining the particles as constant at a fixed depth or in fully 3D mode with optional settling/rise. The particle movement can be tied to EFDC+’s horizontal and/or vertical diffusivity coefficient or a user-specified diffusivity coefficient. You also have the ability to add a random walk option to the particle movements.
Oil Spill Modeling
You can also use the LPT sub-model to simulate oil spills. With this option, EFDC+ allows you to define a total release volume of oil, oil properties such as rise/fall velocities, and loss terms such as evaporation and biodegradation. This powerful sub-model provides support in developing emergency response simulations, and in analyzing the fate and transport of historical spills.