Experimental hydrographs of wetlands in Jacupiranguinhas river microbasins in the Baixo Ribeira do Iguape Valley, SP / Hidrogramas experimentais de área alagada da micro bacia do rio Jacupiranguinha, Baixo Ribeira do Iguape, SP

AUTOR(ES)

Paulino de Almeida Neto

DATA DE PUBLICAÇÃO

2007

RESUMO

It is very important to improve our knowledge about the floodplains, which have been proved by studies, since these areas are vital to the maintenance and preservation of the quality of waters and the fluvial ecosystem. This fact, associated with the importance of the wetlands-river system, makes its investigation and preservation to be considered number one priority. The objective of this research is to analyze factors that may influence hydrographs, according to the fluvial ecology of wetlands in micro basin of Baixo Ribeira do Iguape Valley, SP. The work began with the definition of the studied field and its importance to the area. Subsequently, five hydrometric station and one meteorological station were installed, and therefore the rating curve in the entrance of floodplain was calculated along with the uncertainties related to its parameters. With these studies and with the topographic survey, it was possible to find the relation between wetlands, river stage and flow. The climatologically information, the river stage and the superficial covering vegetation are essential factors to determinate the components (precipitation, superficial flow, evaporation and the storage) of the water balance at the micro basis of Jacupiraguinha river. The hydrometric observation of the river along with historical series and the probability-duration curve make it possible to calculate the ecological flow. Finally, conceptual charts integrating the relations between hydrological and limnologicals factors were built showing the strong association with the wetlands-river system.

ASSUNTO(S)

hydrological factors limnological factors rating curve fluvial ecology Áreas alagadas jacupiranguinha river rio jacupiranguinha planície de inundação floodplain fatores hidrológicos fatores limnológicos wetlands curva-chave ecologia fluvial

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