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soil-atmosphere interaction in earth structures

Journal of Rock Mechanics and Geotechnical Engineering 2022年第1期14卷 35-49页

作者： Yujun Cui Laboratoire Navier Ecole des Ponts ParisTechFrance

The soil-atmosphere interaction was investigated through laboratory testing,field monitoring and numerical *** the laboratory,the soil water evaporation mechanisms were studied using an environmental chamber equipped with a large number of sensors for controlling both the air parameters and soil *** sand and clay were *** case of sand,a dry layer could be formed during evaporation in the near surface zone where the suction corresponded to the residual volumetric water *** evaporative surface was situated at a depth where the soil temperature was the *** case of clay,soil cracking occurred,changing the evaporative surface from one-dimensional to three-dimensional *** suctionbased evaporation model was adapted to take these phenomena into account by adopting a function of dry layer evolution in the case of sand and by adopting a surface crack ratio and a retative humidity ratio in the case of *** the field,the volumetric water content,and the suction as well as the runoff were monitored for an embankment constructed with lime/cement treated *** appeared that using precipitation data only did not allow a correct description of the variations of volumetric water content and suction inside the soils,the consideration of water evaporation being *** was possible to use a correlation between precipiration and *** hydraulic conductivity was found to be a key parameter controlling the variations of volumetric water content and *** the numerical modelling,a fully coupled thermohydraulic model was developed,allowing analyzing the changes in temperature,volumetric water content and suction of soil,with the upper boundary conditions at the interface between soil and atmosphere determined using meteorological *** between simulations and measurements showed the performance of such numerical approach.

关键词： Environmental chamber soil water evaporation Suction-based evaporation model Embankment Field monitoring Numerical modeling

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Application of stable isotope techniques to the study of soil salinization

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Journal of Arid Land 2011年第4期3卷 285-291页

作者： YongQin CUI JianYing MA Wei SUN Dunhuang Gobi and Desert Ecology and Environment Research Station Cold and Arid Regions Environmental and Engineering Research Institute CAS Lanzhou 730000 China Key Laboratory of Vegetation Ecology Ministry of Education Institute of Grassland Sciences Northeast Normal University Changchun 130024 China

In this paper,we reviewed the progress in the application of stable isotope techniques to the study of soil *** a powerful technique,stable isotopes have been widely used in the studies of soil water evaporation,the dynamics of soil salinization and salt-tolerant plant *** impact of single environmental factors on plant isotope composition has been the focus of previous ***,the impact of multiple environmental factors on plant isotope composition remains unclear and needs to be carefully *** order to gain insights into soil salinization and amelioration,especially soil salinization in arid and semiarid areas,it is essential to employ stable isotope techniques and combine them with other methods,such as located field observation and remote sensing technology.

关键词： stable isotope soil water evaporation soil salinization dynamic salt-tolerant plants breeding

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