When analyzing dissemination protocols in mobile ad-hoc networks the underlying mobility model is an important factor because it strongly in°uences the performance of these protocols. So far most of the re- search only dealt with homogeneous mobility models like the very com- mon Random Waypoint Mobility Model and the Random Walk Mobility Model. In this paper we introduce a new model, the Area Graph-based Mobility Model, which considers the major characteristics of realistic sce- narios like their heterogeneity. By analyzing the results of experiments using di®erent broadcast protocols and by comparing our model to the Random Waypoint Mobility Model we examine the characteristics of the Area Graph-based Mobility Model. Furthermore we show, that in hetero- geneous scenarios you should use adaptive broadcast protocols, otherwise an e±cient dissemination in areas with di®ering topologies and densities is not possible.