Natural Soil Vulnerability of Silveira Martins-RS

ABSTRACT

The environmental analysis, based on morphogenesis and pedogenesis processes, provide important data for the development public policies for the use and occupation landscape sustainably. This research aimed to analyse the vulnerability to natural soil loss of Silveira Martins-RS. Therefore, created a spacial database in a Geographic Information System (GIS) using Spring software. Vulnerability to natural soil loss map was prepared based on information regarding the slope, geomorphology, geology and soils according to the degree of vulnerability of each information through map algebra. Were identified the occurrence of five classes in Silveira Martins municipality, there are the stable units with a predominance of soil forming processes (38.08%), and moderately vulnerable units, prevailing erosion processes (53.67%). Areas classified as moderately vulnerable and vulnerable (8.25%) correspond to areas with slopes greater than 25º and with geological and geomorphological formation less stable. The units in which predominated the natural vulnerability, it is suggested that special attention in relation to the natural environmental and the agents that influence. Thus, it is necessary to use good social practices associated with environmental policies in the process of economic decision, enabling the recovery and protection of the natural environment.

environmental diagnostic; ecological-economic zoning; geotethnology