Results 241 to 250 of about 32,663 (290)
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Airflow dispersion in unsaturated soil
Journal of Contaminant Hydrology, 2006Dispersion data is abundant for water flow in the saturated zone but is lacking for airflow in unsaturated soil. However, for remediation processes such as soil vapour extraction, characterization of airflow dispersion is necessary for improved modelling and prediction capabilities. Accordingly, gas-phase tracer experiments were conducted in five soils
T, Gidda +3 more
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On-line estimation of biodegradation in an unsaturated soil
Bioprocess and Biosystems Engineering, 2003The objective of this study was to develop a model-based estimator of biodegradation in unsaturated soil. This would allow real-time assessment of the efficiency of treatment bioprocesses, such as bioventilation and biopile, and eventually permit optimization through the implementation of control strategies.
O, Schoefs +3 more
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Numerical simulation of unsaturated soil behaviour
International Journal of Computer Applications in Technology, 2009The mechanical behaviour of unsaturated soils is one of the challenging topics in the field of geotechnical engineering. The use of finite element techniques is considered to be a promising method to solve settlement and heave problems, which are associated with unsaturated soil. Nevertheless, the success of the numerical analysis is strongly dependent
Ayman A. Abed, Pieter A. Vermeer
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Consolidation analysis for unsaturated soils
Canadian Geotechnical Journal, 2004This paper deals with the multidimensional consolidation of unsaturated soils when both the air phase and water phase are continuous. Following the approach proposed by D.G. Fredlund and his coworkers, the differential equations governing the coupled and uncoupled consolidation are first derived and then solved numerically.
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Environmental and Engineering Geoscience, 2007
Classical soil mechanics, as presented in 1948 by Karl Terzaghi and Ralph B. Peck in their seminal text Soil Mechanics in Engineering Practice, encompasses three broad categories of soil behavior: hydraulics (flow), plastic equilibrium (stress) and settlement (volume change).Author: In first sentence of review, please consider providing a reference ...
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Classical soil mechanics, as presented in 1948 by Karl Terzaghi and Ralph B. Peck in their seminal text Soil Mechanics in Engineering Practice, encompasses three broad categories of soil behavior: hydraulics (flow), plastic equilibrium (stress) and settlement (volume change).Author: In first sentence of review, please consider providing a reference ...
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A permeameter for unsaturated soil
Transport in Porous Media, 1991A permeameter for unsaturated soil was developed by observing the way in which pore water recovers hydrostatic equilibrium. It works like an hour glass that is turned upside-down everytime the state of reference (or hydrostatic equilibrium) is reached.
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Anisotropy of Unsaturated Soils
Soil Science Society of America Journal, 1984Abstract A conceptual model is applied for quantitative evaluation of the anisotropy factor during desaturation. The soil is assumed to consist of many thin parallel layers having different hydraulic properties. A uniform density distribution function is used to represent the saturated hydraulic conductivity probability of the various
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2018
Water in soil usually fills soil pores only partially, therefore soil unsaturated with water is the prevailing state of soil. The soil unsaturated with water is a necessary condition for the majority of the plants that grow in the environmental conditions of Europe.
Viliam Novák, Hana Hlaváčiková
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Water in soil usually fills soil pores only partially, therefore soil unsaturated with water is the prevailing state of soil. The soil unsaturated with water is a necessary condition for the majority of the plants that grow in the environmental conditions of Europe.
Viliam Novák, Hana Hlaváčiková
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Instrumentation of an Unsaturated Residual Soil Slope
Geotechnical Testing Journal, 1999Abstract The stability of slopes has become a major concern in areas that experience frequent periods of heavy rainfall such as the tropical areas of Southeast Asia. Previous research has indicated that rainfall has a detrimental effect on the stability of residual soil slopes.
Rahardjo, Harianto +3 more
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