During the seventies and eighties, with the development of "Zona Franca" (duty free zone), the city of Manaus became the main regional migratory flux center. A sudden and deranged rhythm of the urban growth, culminates with an unsuitable areas for living, for example, steeped slopes, landslides and landscape erosion, lower-lying plains, forest park, etc., which in this way, promote new social and environmental problems. The bad land use and deforestation lead to changes on physical environmental (erosional processes), climate and tropical disease increase. The present study is paying particular attention to examining the erosional processes based on a wide-ranging vulnerability analysis of the southeastside of Manaus City.

The Vulnerability Map is - in agreement with Tricart's conception - the further identification of landscape stability units, based on the partial goals of Crepani et al. (1996). A vulnerability classification was accepted: stable, moderately stable, average stable/vulnerable, moderately vulnerable and vulnerable units. Forty erosional features were carry out into an Erosional Processes Distribution Map, mainly on antropic activity. Nevertheless, the evolutionary processes are strongly controlled by natural features of the rocks. The rill and gully erosions axes show northeast and northwest direction nearly concordant with the local lineaments. The Vulnerability and Erosional Processes Distribution maps together, congregates all forty erosional features related on vulnerable and moderately vulnerable units. In this sence, the task achieved proves by reasoning the efficience of the methodology applied. The identifing of vulnerable areas due to erosional processes becomes na important key to the urban planning. This work deals the racional planning of the studied region leading to a better quality of the urban environment for Manaus City.