CHARACTERISTICS OF RAINFALL AND THE RAINFALL EROSIVITY OF THE PARANA STATE SLOPE OF THE ITARARÉ WATERSHED

Authors

  • Paulo Miguel de Bodas Terassi Universidade de São Paulo
  • Carlos Henrique da Graça Universidade Estadual de Maringá
  • José Tadeu Garcia Tommaselli Universidade Estadual Paulista "Júlio de Mesquita Filho" - Campus de Presidente Prudente

DOI:

https://doi.org/10.11606/rdg.v31i0.112021

Keywords:

rainfall, erosive potential, watershed, soil losses.

Abstract

Information about the rainfall erosive potential are necessary for the prevention and control of soil degradation as well as the planning and development of watersheds in tropical regions. This study aimed to characterize the rainfall and quantify the rainfall erosive power in Paraná slope of the Itararé watershed, given the importance for proper management and application of predictive practices soil losses. Were obtained rainfall data of thirteen rain gauge stations and the weather station Joaquim Távora, which belongs to the Agronomic Institute of Paraná, for the historical data serie to 1976-2012. The rainfall erosivity index was calculated using an equation of the type a + bx, which a and b = linear and angular coefficients, x = p2/P (p - average monthly rainfall in mm; P - average annual rainfall in millimeters). The results indicated that the summer and spring are characterized by having the greatest susceptibility to rainfall erosivity due to a concentration of 70.8% of the annual values. Were obtained four homogeneous as the rainfall erosive potential, proving the relationship between orography and regional atmospheric dynamic.

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Author Biographies

  • Paulo Miguel de Bodas Terassi, Universidade de São Paulo
    Doutorando em Geografia Física pela Universidade de São Paulo - Bolsista CAPES.
  • Carlos Henrique da Graça, Universidade Estadual de Maringá
    Doutorando em Geografia pela Universidade Estadual de Maringá - Bolsista CAPES.
  • José Tadeu Garcia Tommaselli, Universidade Estadual Paulista "Júlio de Mesquita Filho" - Campus de Presidente Prudente
    Professor Doutor do Departamento de Geografia e do Programa de Pós-Graduação da Universidade Estadual Paulista "Júlio de Mesquita Filho" - Campus de Presidente Prudente

Published

2016-07-24

Issue

Section

Artigos

How to Cite

Terassi, P. M. de B., Graça, C. H. da, & Tommaselli, J. T. G. (2016). CHARACTERISTICS OF RAINFALL AND THE RAINFALL EROSIVITY OF THE PARANA STATE SLOPE OF THE ITARARÉ WATERSHED. Revista Do Departamento De Geografia, 31, 118-131. https://doi.org/10.11606/rdg.v31i0.112021