With the beginning of clearing and agriculture in the celtic-roman phase the soils and the relief were changed intensively. It can be assumed that the need of arable land and wood by the villa of Reinheim and the big Roman settlement resulted in the clearing of the hillsides. In contrast to the pre-roman phase with largely natural vegetation, the land now lies fallow or is used for agriculture. As the protecting vegetation cover is missing erosion starts on the hillsides. The result of the increasing degradation of the primary vegetation and the intensive land use are soil degradation and thus changes in the usability of land as well as the development of haugh and alluvial fans. The landslides, the thick colluviums at the base of the slopes and the shallow soils at the steeper parts indicate an intense erosion with cutted soils especially in the upper part of the slopes. In a number of relief positions correlating displaced sediments can be indicated next to the natural sediments by its colour and its content of humus. In the profiles of the Blies valley this is reflected by an increased accumulation of washed topsoil. Beginning with an increasing degradation of the primary vegetation there are two different sedimentation phases which have the covering of roman street foundations with sediments as a consequence.
The big masses of displaced material caused changes in relief and river course. The material coming from 2 notches of the west hillside of the river (soil and pebbles) forced the river gradually to change its direction. Whereas at the beginning of the settlement the Blies flew in a wide bend (also indicated by the glacial river terraces), at this point the river was displaced by the alluvial fan.