BIMODAL AND MULTIMODAL DESCRIPTIONS OF SOIL-WATER CHARACTERISTIC CURVES FOR STRUCTURAL SOILS
Many empirical models have been developed to describe soil-water characteristic curves (SWCCs).Unfortunately,few functions adequately describe SWCCs of structured soils.In the presented study,a bimodal and a multimodal SWCCs functions have been developed for the purpose of studying unsaturated water flow and solute transport in structured soils.The model involves two or multiple overlaying continua pore systems,the pore probability density functions of systems are assumed as lognormal distribution and them can be superposed to obtain the overall probability density function of the soil.The proposed functions are capable of simulating bimodal or multimodal SWCCs using parameters which can be related to physical properties of the structural soils.After verification,we conclude that proposed function fit bimodal SWCCs very well.These models can potentially be used as effective tools for indentifying hydraulic porosities in the structural medium.
macropore system micropore system lognormal distribution soil-water characteristic curves (SWCCs) bimodal soil-water characteristic curves (bimodal SWCCs) multimodal soil-water characteristic curves (multimodal SWCCs)
SHIYU LIU NORIYUKI YASUFUKU QIANG LIU KIYOSHI OMINE HAZARIKA HEMANTA
Faculty of Engineering,Kyushu University,Fukuoka,819-0382,Japan
国际会议
5th China-Japan Geotechnical Symposium(第五届中日岩土工程学术会议)
成都
英文
241-248
2013-05-18（万方平台首次上网日期，不代表论文的发表时间）