As interrelações de elementos do meio fisico natural e modificado na definição de areas potenciais de inflitração na porção paulista da bacia do rio Paraiba do Sul / The definiton of potencial areas of inflitration in the Paraiba do Sul river basin - an integrated approach using physical and antropic elements

AUTOR(ES)
DATA DE PUBLICAÇÃO

2005

RESUMO

This thesis intends to present procedures to classify Homologous Areas related to infiltration process in Paraíba do Sul river watershed. The method used to define these areas consist to create ?patches?, grouping several proprieties of the terrain in order to identify infiltration areas which are capable to suplly the storage water in the ground and to maintain the underground water system of the basin. The landscape elements used to classify these areas were: rocks and structures, land surface, soil characteristics, precipitation and land use. For each element itwas applied a values from 1 to 5 which corresponded the range of potential infiltration capacityvaring from low (1) to high (5). GIS (Arcview) was the tool used to overlay the maps of the atributes, already scaled according to its infiltration capacity, in order to create the map with the Homologous Areas. This procedure was carried out to evaluate the Homologous Areas in two scale: (1) regional map, 1:250,000 scale, was medium portion of Paraiba do Sul river, with 7,600square kilometers, and (2) Guaratinguetá river basin, 1:50,000 scale, with 160 square kilometers, located at left edge of Paraiba do Sul river. Homologous Areasin regional scale showed that high infiltration capacity areas are situated in hills, between scarps and alluvial plains in the north westportions of the region and in the east portion, limit of São Paulo State. For the Guaratinguetá river basin, the areas of high infiltration capacity are located in the central and northwest of the basin.For both analyses, scarp areas and alluvial plains presented low infiltration capacity. However, scarp areas are important in the transfer mechanism from production areas to storage areas. The aluvionar plains are capable to storage water and continuously supply the drainage systemwith it.This thesis discusses and indicates as environmental indicators: land use, dynamic of springs andminimum steam

ASSUNTO(S)

rios - são paulo hidrologia gis watershead integrated analyses sistemas de informação geografica paraiba do sul river meio ambiente bacias hidrograficas water availability infiltração physical elements

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