Integrated assessment of the infiltration and overland flow for differnt rainfall events – Córrego do Vaçununga basin, municipality of Luis Antônio, State of São Paulo, Brazil.
DOI:
https://doi.org/10.14195/2184-8394_106_4Keywords:
Infiltration, Surface runoff, Aquifer, Botucatu formationAbstract
This work presents the results for infiltration and overland flow obtained according to Morel Seytoux and Khanji (1976) and Chu (1978) adaptation of the Green and Ampt (1911) model for steady and transient rainfalls, respectively. The study was carried out in the Córrego do Vaçununga basin, in the city of Luiz Antônio, state of São Paulo, Brazil. Ninety percent of the basin is constituted of eolian sandstones of Botucatu Formation and residual unconsolidated materials. These two geological materials constitute the main aquifer of the region. Laboratorial and in situ tests were performed to characterize the unconsolidated materials in terms of basic physical properties, potential infiltration, suction and hydraulic conductivity. Rainfall data were collected from January of 2000 to December of 2002 and twelve scenarios were defined considering the intensities and duration. Instead of high homogeneity in terms of texture of unconsolidated materials the infiltration and overland flow ratio depends on the uses and associated management techniques.
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