Análise da composição da vazão na bacia hidrográfica do rio Forqueta (Maquiné/RS)
Keywords:
Escoamento superficial, Bacia florestada, Alta declividadeAbstract
There are still few works aimed at hydrological monitoring of small catchments, mainly in catchments with great altitude difference and covered by forests. In this sense, the present work aims to quantify surface runoff at the scale of rainfall events and relate the hydrological variables of the Forqueta river catchment (Maquiné/RS). For this, hydrological monitoring was carried out in the catchment through a rainfall station and a meteorological station for precipitation and a linigraph for the discharge, both recording data at continuous intervals of 10 minutes. After obtaining, the data were organized, and the rainfall-runoff events were identified. In total, 52 rainfall-runoff events were accounted for, and twelve hydrological variables were extracted from each event. Correlation analyzes were performed between these variables to verify the relationship between them and the difference of these variables was analyzed seasonally. The results showed that 50.88% of runoff is produced by isolated rainfall events. Monitoring at scale of rainfall events is important to show the behavior of runoff in the catchment in more detail and assist in the water resources management.
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