Abstract Designing ecological corridors studies are much more common than studies that evaluate the effectiveness and practicality of implementation. Thus, this study aimed to identify and discuss factors that can influence the implementation of ecological corridors designed from a multicriteria analysis. For this purpose, the ecological corridor implementation efforts of a Non-Governmental Organization (NGO) in an Atlantic Forest region were evaluated. The following information about the restoration projects was collected from the NGO database: georeferenced restoration polygons, restoration technique, project size, motivation, and land use tenure characteristics of the restoration site. Restoration polygons were spatially referenced to the planned corridor areas and classified according to land use and land cover, slope, distance to roads and occurrence in Permanent Preservation Areas. The NGO implemented 455.0 hectares of restoration, with only 10.7% within proposed corridors. NGO projects were concentrated on ecological restoration, which presents significant differences between ecological corridors. In practice, the implementation of restoration areas was primarily guided by the local characteristics of the landscape, project’s constraints and the will and interest of rural landowners in restoring their properties. This differs from its planning, in which social and economic aspects were not considered and only the environmental variables were taken into. Thus analysis purpose NonGovernmental Non Governmental (NGO evaluated database technique size motivation site cover slope Areas 4550 455 0 455. 107 10 7 10.7 practice landscape s properties planning into 45 1 10. 4

Em diferentes regiões do Brasil, o crescimento populacional e o desenvolvimento econômico podem degradar a qualidade da água comprometendo a saúde das bacias hidrográficas e abastecimento humano. Sistemas de Informação Geográfica (GIS) constituem uma ferramenta poderosa para o gerenciamento dos recursos hídricos, evitando inundações devido à sua capacidade de colocar, em um mesmo ambiente, dados espaciais e temporais que possibilitem a criação de cenários que contribuem para a gestão de recursos hídricos. Este artigo discute a integração entre GIS e modelos hidrológicos e apresenta um estudo de caso que corresponde à parte superior da bacia Paraíba do Sul (porção de São Paulo) situado no Sudeste do Brasil. O estudo de caso apresentado neste artigo tem um banco de dados que é adequado para a dimensão da bacia incluindo mapas topográficos digitalizados em escala 1:50.000. Neste projeto foi utilizado o ArcGIS®/ArcHydro FrameWork Model Data onde foi criada uma rede de dados topológica para produzir diferentes produtos matriciais. O primeiro mapa derivado do Modelo Digital de Elevação (MDE) foi o mapa direção de fluxo seguido pelo mapa de acumulação de fluxo e mapa de sub-bacias. Os próximos passos desta pesquisa devem incluir os diferentes reservatórios multiusos situados ao longo do rio Paraíba do Sul e incorporar dados de séries temporais de chuvas no ArcHydro com o objetivo de construir um modelo de dados hidrológicos dentro de um ambiente SIG a fim de produzir um modelo completo com componentes espaciais e temporais.

In different regions of Brazil, population growth and economic development can degrade water quality, compromising watershed health and human supply. Because of its ability to combine spatial and temporal data in the same environment and to create water resources management (WRM) models, the Geographical Information System (GIS) is a powerful tool for managing water resources, preventing floods and estimating water supply. This paper discusses the integration between GIS and hydrological models and presents a case study relating to the upper section of the Paraíba do Sul Basin (Sao Paulo State portion), situated in the Southeast of Brazil. The case study presented in this paper has a database suitable for the basin's dimensions, including digitized topographic maps at a 50,000 scale. From an ArcGIS®/ArcHydro Framework Data Model, a geometric network was created to produce different raster products. This first grid derived from the digital elevation model grid (DEM) is the flow direction map followed by flow accumulation, stream and catchment maps. The next steps in this research are to include the different multipurpose reservoirs situated along the Paraíba do Sul River and to incorporate rainfall time series data in ArcHydro to build a hydrologic data model within a GIS environment in order to produce a comprehensive spatial-temporal model.