Modelagem hidrológica das bacias do Salgado, alto e médio Jaguaribe utilizando o HEC-HMS com vistas à operação das comportas do reservatório Castanhão

Abstract

The purpose of this paper was to test the Engineering Center‐Hydrologic Modeling System (HEC‐HMS) in development of a model to quantify the inflow in Castanhão reservoir. In order to make easier the spatial data handling for hydrology analysis, it was used the ArcGIS geographical information system. The chosen places to the case studies was the watershed of Salgado, Alto Jaguaribe e Médio Jaguaribe; which takes a lot of the south central region of the State of Ceará. This model was tested for a single extremely rainfall event. The calculation methods used was: the Curve Number for loss, the unitary hidrogram from Soil Conservation Service for the rainfall-runoff transformation, the kinematic wave for routing in rivers and the Pulz’s method to routing in reservoir. The results were satisfactory, mainly due to the simplifications adopted for the calculation methods, showing that it can get closer to the reality of the situation and be able to turning a model to flood forecast, with views to the operation of the reservoir Castanhão’s floodgates.