Numerical modeling of hydrodynamics and tracer dispersion during ice-free period in Lake Winnipeg

► A three dimensional hydrodynamic model was successfully applied to Lake Winnipeg to simulate circulation, temperature and tracer dispersion in the lake. ► The model simulated mean seasonal circulation shows two cyclonic gyres in the North Basin and one gyre in the South Basin. ► Model was used to estimate local flushing time of Red River in the southern basin.