RUNOFF GENERATION IN A SMALL CATCHMENT WITH ATLANTIC RAINFOREST, CUNHA, SP, BRAZIL

Authors

  • Maurício Ranzini Instituto Florestal
  • Valdir de Cicco Instituto Florestal
  • Francisco Carlos Soriano Arcova Instituto Florestal
  • Cíntia Ferreira Donato Universidade de São Paulo

DOI:

https://doi.org/10.24278/2178-5031.2011232293

Keywords:

runoff generation, rainfall, stormflow, base flow, peak flow

Abstract

This paper studied the response of runoff to rainstorm events of a small experimental catchment (37.5 ha) with Atlantic Rainforest. The Forest Hydrological Laboratory, at Cunha, is located in the Serra do Mar State Park, SE Brazil. The total volume of stormflow is 8.3% of annual rainfall. The response of runoff to rainfall showed a variability of the hydrographs, which depended on intensity of the precipitation and soil humidity conditions before the flood. In general, the hydrographs tended to roughly reproduce the shape of the rainstorm. It was identified two groups of hydrographs, separated according to the quotient between rainfall and peak flow. At first, the contribution of base flow was low, with the direct runoff hydrograph dominating and the variable source area (V.S.A.). In the other, an increase in precipitation resulted in an increase in peak flow, even during the heaviest rainstorms, suggesting that V.S.A. occupied a smaller part of the catchment, close to the channel. These results indicated that antecedent soil moisture was important for the response of runoff to rainfall.

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Author Biography

Cíntia Ferreira Donato, Universidade de São Paulo

Acadêmica do curso de Gestão Ambiental da Universidade de São Paulo

References

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Published

2011-12-01

How to Cite

RANZINI, Maurício; CICCO, Valdir de; ARCOVA, Francisco Carlos Soriano; DONATO, Cíntia Ferreira. RUNOFF GENERATION IN A SMALL CATCHMENT WITH ATLANTIC RAINFOREST, CUNHA, SP, BRAZIL. Journal of the Forest Institute , São Paulo, v. 23, n. 2, p. 179–190, 2011. DOI: 10.24278/2178-5031.2011232293. Disponível em: https://rif.emnuvens.com.br/revista/article/view/293. Acesso em: 6 jul. 2025.

Issue

Section

Scientific Articles