Determinação da condutividade hidráulica do latossolo roxo distrófico por atenuação de raios gama e tensiometria.

Júlio César Martins de Oliveira; Klaus Reichardt; Carlos Roberto Appoloni; Antônio Domingos Bártholo de Souza; Antônio Carlos Saraiva da Costa

doi:10.5433/1679-0375.1995v16n4p550

Hydraulic conductivity determination of a dark red latosol by gamma attenuation and tensiometry.

Authors

Júlio César Martins de Oliveira Universidade de São Paulo
Klaus Reichardt Universidade de São Paulo
Carlos Roberto Appoloni Universidade Estadual de Londrina
Antônio Domingos Bártholo de Souza Centro Federal de Educação Tecnológica.
Antônio Carlos Saraiva da Costa Universidade Estadual de Maringá

DOI:

https://doi.org/10.5433/1679-0375.1995v16n4p550

Keywords:

hydraulic conductivity, gamma attenuation.

Abstract

Results for the hydraulic conductivity of a dark red latosol (Oxisol) under laboratory and field conditions are presented. The laboratory experiments simulated field conditions through the measurement of the soil water content profiles as a function of time in soil columns. The data were obtained by the ²⁴¹Am gamma-ray transmission method, using standard gamma ray spectrometry equipament. Tensiometers at the depths of 10 and 25 cm were used to obtain the soil water content profiles as a function of time in the field experiments. The hydraulic conductivity functions were determined through internal soil drainage. The results showed higher values of the hydraulic conductivity measured in the field, compared with the laboratory values. The hydraulic conductivity determination methods presented distinct values for the field experiments as well as for the laboratory ones.

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Author Biographies

Júlio César Martins de Oliveira, Universidade de São Paulo

Seção de Física de Solos / CENA/ USP.

Klaus Reichardt, Universidade de São Paulo

Departamento de Física/ESALQ/USP.

Carlos Roberto Appoloni, Universidade Estadual de Londrina

Departamento de Física.

Antônio Domingos Bártholo de Souza, Centro Federal de Educação Tecnológica.

Centro Federal de Educação Tecnológica.

Antônio Carlos Saraiva da Costa, Universidade Estadual de Maringá

Departamento de Agronomia.

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Published

2004-12-15

How to Cite

Oliveira, J. C. M. de, Reichardt, K., Appoloni, C. R., Souza, A. D. B. de, & Costa, A. C. S. da. (2004). Hydraulic conductivity determination of a dark red latosol by gamma attenuation and tensiometry. Semina: Ciências Exatas E Tecnológicas, 16(4), 550–553. https://doi.org/10.5433/1679-0375.1995v16n4p550

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Issue

Vol. 16 No. 4 (1995)

Section

Original Article

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