Effects of the parameters characterizing the electron‐transport properties in an In0.52Al0.48As/In0.53Ga0.47As/In0.52Al0.48As double heterostructure are theoretically investigated using the Monte Carlo approach. The calculated results are compared with the previously measured electron velocity versus electric‐field relationship for the investigated structure. It is found that the effects of the &Ggr;‐valley nonparabolicity factor and the intervalley energy separations in In0.53Ga0.47As are the most remarkable within the investigated parameters.