Hi all, I run the EFDC model (SNL version). When I used a dynamic time step. The model print “TIME,DTDYN,DTMIN,I,J = 134.69, 0.4797E+01…” (attached). May someone explain what does this mean? Does this affect the simulation results? Thanks! Huang Attached files 
The EFDC run screen is just reporting what the model is doing. It will not impact the model results but tells the user if there is instability in the model and how the model is performing. The meaning of “TIME, DTDYN, DTMIN, I, J” seems to relate to the dynamic time step (Delta Time Dynamic, Delta Time Minimum).