These parameters are found under “Abiotic parameters / Numerical” in the model.
Calculations of flows and the correspondent updating of state variables can be adjusted during a simulation depending on how the numerical properties changes with certain conditions as rapid change in some critical flows. The parameters for control of these conditions would be thoroughly examined if you need to reduce CPU-time requirements for a simulation. Remember that since the CoupModel uses a simple explicit method for integration, numerical problems are likely to occur if too few iterations are chosen.
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