Loading…
X-ray computed microtomography in the evaluation of the porous system of soils/Microtomografia computadorizada de raios X na avaliacao do sistema poroso de solos
Analysis of shapes, sizes, continuity, orientation and irregularities of pores can help in the study of soil structural modifications induced by soil management. The study of the inter- and intra-aggregate porous space of urban and rural soils by tomographic images is the objective of this work. A m...
Saved in:
Published in: | Revista brasileira de engenharia agrĂcola e ambiental 2018-04, Vol.22 (4), p.249 |
---|---|
Main Authors: | , , , , , |
Format: | Article |
Language: | English |
Online Access: | Get full text |
Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
Summary: | Analysis of shapes, sizes, continuity, orientation and irregularities of pores can help in the study of soil structural modifications induced by soil management. The study of the inter- and intra-aggregate porous space of urban and rural soils by tomographic images is the objective of this work. A morphometric characterization of the pores was carried out with the analysis of distribution of their size, shape and inclination in these two types of soil. The urban soil showed smaller percentage of inter-aggregate voids and more intra- aggregate voids compared with the rural soil. The cumulative distribution of void volumes showed little pore diversity in the urban soil and great presence of large pores (48%), almost twice the voids with same size in the rural soil. The urban soil, compared to rural soil, also had a higher percentage of flattened pores (29.41%) and a smaller percentage of rounded voids (6.97%), as well as a greater percentage of horizontal voids (44.49%). Hence, the urban soil proved to be more compacted than the rural soil. Key words: porosity tomographic images soil compaction A analise dos formatos, tamanhos, continuidade, orientacao e irregularidades dos poros pode auxiliar no estudo das modificacoes estruturais do solo induzidas pelo manejo do solo. O estudo do espaco poroso interagregado e intra-agregado de um solo urbano e de um solo rural por meio de imagens tomograficas e objetivo desse trabalho. Foi feita uma caracterizacao morfometrica dos poros com a analise da distribuicao dos tamanhos, formato e inclinacao dos poros nesses dois tipos de solo. O solo urbano apresentou menor quantidade de vazios interagregados e maior quantidade de vazios intra-agregados que o solo rural. A distribuicao acumulada dos volumes dos vazios apresentou pouca diversidade de poros no solo urbano e grande presenca de poros grandes (48%), quase o dobro dos vazios de mesmos tamanhos no solo rural. O solo urbano, quando comparado com solo rural, tambem apresentou maiores quantidade de poros achatados (29,41%) e menores quantidade de vazios arredondados (6,97%), como tambem uma maior quantidade de vazios horizontais (44,49%). Com isso, o solo urbano se mostrou estar mais compactado que o solo rural. Palavras-chave: porosidade imagens tomograficas compactacao de solo |
---|---|
ISSN: | 1415-4366 |
DOI: | 10.1590/1807-1929/agriambi.v22n4p249-254 |