Análise da interação solo-atmosfera em solos argilosos compactados não saturados: relação entre evaporação e sucção (ou umidade volumétrica)
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Data
2023-09-06
Autores
Poleto, Thiago Luiz
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Universidade Federal do Espírito Santo
Resumo
In this work, the influence of soil-atmosphere interaction is evaluated in a monitored experimental landfill divided into two symmetrical sections built with compacted clay soils treated with lime exposed to the same atmospheric conditions in Hericourt, Haute Saône region, France. For illustrating the influence of such interaction, data from monitoring soil moisture and suction and climatic conditions are presented and discussed. Potential Evaporation (Ep) values were calculated considering empirical formulations selected from the literature, commonly used and based on measurements of air temperature and relative humidity at the location. The analyzes carried out use climate data collected at a meteorological station built at the site of the landfill being monitored under study. The main objective of the work is to compare the potential evaporations (Ep) calculated by the selected empirical methods with the suction and volumetric humidity data measured in unsaturated compacted clayey soils on the surface of the landfill constructed in the study region. The measured variations of (θw) and (s) on the compacted surfaces of the two lime-treated soils (a high-plasticity clay and a low-plasticity clay) show consistency with local seasonal climatic variations. During the water deficit from May to June 2011, the measured suction values (s) increased consistently and the corresponding θw decreased, suggesting a relatively significant water evaporation effect. In the s x Ep relationship, from April to June 2011 for the empirical methods Ep based on air temperature exhibited a more substantial increase in evaporation with increasing soil suction. The empirical method based on air temperature and relative humidity did not adequately describe the water balance during the drying period. It is noteworthy that to apply the empirical methods for calculating Ep selected in these works to any location, a study with a larger database measured from different regions over several years is necessary.
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Evaporação , Interação solo-atmosfera , Aterro monitorado , Métodos empíricos