Integração de modelos hidrológicos e sistemas de informação geográfica na análise de processos de outorga quantitativa de uso da água : aplicação na bacia do rio dos Sinos - RS

AUTOR(ES)
FONTE

IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia

DATA DE PUBLICAÇÃO

2010

RESUMO

In order to grant water rights to its user, it is necessary that technicians from the institution in charge verify if there is indeed the capability from the water body to overtake the requested demands (withdrawal or effluent disposal), considering other existing uses and local hydrology. In many cases in Brazil and other countries, the required analyses are still largely made by hand, using paper maps and spreadsheets not integrated to Geographic Information Systems (GIS). This work presents a methodology based on the integration of GIS and hydrological models for analyzing and granting water rights requests. This methodology implies: 1) the use of GIS for data pre-processing and by means of using an hydrological rainfall-runoff model; 2) the application of this rainfall-runoff model to estimate the water discharge availability that can be used as a reference for every reach of the river in which the basin is divided; 3) the transfer of the hydrological model results back to the GIS; and 4) the application of a Decision Support System in which simple calculations of water balance are done entirely in GIS environment. The presented methodology was applied to the case of the Rio dos Sinos basin, in Rio Grande do Sul, Brazil, a region where water demands exceed availability. Results of this case study showed that it is possible to improve the methodology used to analyze the granting of water rights when GIS and hydrological models are integrated.

ASSUNTO(S)

grant of water use recursos hidricos : outorga geographic information system modelos hidrologicos sistemas de informação geográfica hydrological model gis decision support system sistemas de apoio a decisao

ACESSO AO ARTIGO

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