Areas hidrologicamente homogêneas como subsídio ao manejo de bacias hidrográficas

• Autor(a) principal: Nicolete, Donizeti Aparecido Pastori [UNESP]
• Data de Publicação: 2015
• Tipo de documento: Dissertação
• Idioma: por
• Título da fonte: Repositório Institucional da UNESP
• Texto Completo: http://hdl.handle.net/11449/131885; http://www.athena.biblioteca.unesp.br/exlibris/bd/cathedra/20-10-2015/000853136.pdf
• topic: Agua - Conservação; Bacias hidrograficas - Administração; Geotecnologia ambiental; Lógica difusa; Environmental geotechnology

Growing demand for water makes it necessary to adopt mechanisms to ensure a more efficient management of this resource. The presence of intense anthropic activity characterizes rural watersheds, where, depending on the soil use and management, can promote impairments of water resources. The initial part of Pardo river watershed was adopted as study area, and is located in the county of Pardinho, São Paulo state, Brazil. The choice of this watershed is due the fact that the Pardo river is an important wellspring for many counties of São Paulo state. With the goal to characterize the hydrologically homogenous areas for water infiltration potential, as well as runoff formation, it was adopted a methodology based on the geotechnologies use. For this, there were adopted information layers to landscape attributes, such as land use and land cover, soil, slope, vertical curvature, horizontal curvature and geology. The attributes were combined using map algebra, more precisely, the weighted linear combination technique, where each attribute has been considered as a conditioning factor to infiltration and surface runoff. To the factors were applied fuzzy membership functions for their standardization and the determination of weights through the Analytical Hierarchical Process method. To identify more susceptible areas to runoff, denominated hydrologically sensitive areas, was adopted the topographic wetness index, used as a simplified form of variable source area patterns spatialization in the watershed. The results showed that most of study area has medium ...