Open AccessStatistical comparison between the adjustment equations of the water retention curve in sanitary landfills coverage soil
Author(s) -
Alexandre de Souza Júnior,
Bruna Silveira Lira,
Henrique Antônio Oliveira Araújo,
Jeovanesa Régis Carvalho,
Maria Natália de Melo Sousa,
Pabllo da Silva Araújo,
Renan Ítalo Leite Gurjão,
William de Paiva
Publication year - 2022
Publication title -
águas subterrâneas
Language(s) - English
Resource type - Journals
eISSN - 2179-9784
pISSN - 0101-7004
DOI - 10.14295/ras.v35i3.30073
Subject(s) - soil water , water retention curve , geotechnical engineering , suction , vadose zone , residual , drainage , water content , environmental science , moisture , soil science , pedotransfer function , geology , mathematics , water retention , hydraulic conductivity , materials science , engineering , mechanical engineering , ecology , biology , composite material , algorithm
Residual soils result from chemical weathering, so their characteristics depend on environmental factors, in addition to origin, topography, drainage and geological age. In the unsaturated condition, the behavior of soils is conditioned by suction, which refers to the state of the soil under reduced pressure. The aim of this study is to compare the water retention curve fitting equations in the study of tropical unsaturated soils through the filter paper technique and the analytical analysis of the data obtained in this test. By performing the analysis of the statistical evaluation parameters used in this study and the proximity of its values to the necessary boundary conditions defined for the equation to explain the soil suctioning behavior of the soil as it loses moisture naturally to the environment, it was verified that the Van Genuchten equation appeared to be the most suitable.