A 2-D mesoscale model including a vegetative land breeze of Qinghai Lake during summer and a eterization is lased to study the lake-ad breeze is again simulated 9 thereby confirming the ability of the model to reproduce the known properties of this local mesoscale circulation, such as cold (heat) island circulation and wet island. The results show that this model is sensitive to changes in the vegetative cover, namely, the lake-land breeze with shore covered by sparse vegetation (δ=30%) is smaller (grenter) than that at daytime (night) in the case of bare shore. It is also shown that the horizontal temperature (or humidity) gradient is decreased when the vegetative cover is increased.