Análise numérica de métodos empíricos do estudo da condutividade hidráulica
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Data
2018-09-28
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Universidade Federal de Goiás
Resumo
In the context of Agronomic and Environmental Sciences, the hydraulic conductivity K (µ)
as a function of the humidity (µ) and granulometry, is especially important for the study
and solution of practical problems related to irrigation, drainage , leaching of nutrients and
pollutants, slope stability, problems related to soil compaction in general. Studies will be
carried out that stipulate the hydraulic conductivity K (µ) from the particle size distribution
and moisture content for certain types of soil, with the particle diameter as the main
parameter to obtain the same. One of the advantages in this methodology is the reduction
of laboratorial costs and the reduced time when compared to tests to obtain these physical
indexes. The state of the art in empirical validation has produced numerical models
for simulation description of physical indices. Using experimental methodologies, we will
use these models for the validation and subsequent analysis of results for soils obtained at
UFCat. The first part of the work will be devoted to the study of statistical models, which relate the behavior of the hydraulic coef cient with the soil granulometry. For this part of the
work, the main referencewill be the article (SALARASHAYERI; SIOSEMARDE, 2012). The models that will be used in this dissertation were obtained in (SALARASHAYERI; SIOSEMARDE, 2012), where the authors, through 25 samples of sandy soil extracted characteristics of the hydraulic conductivity. In the present case, laboratory tests have shown that the characteristic of the analyzed soil approaches a clayey behavior see (GONçALVES-FILHO et al., 2017b), (GONçALVES-FILHO et al., 2017a). To overcome this problem we will use the graphs generated from experimental analyzes made by means of humidity sensors, to calibrate statistical models. In the second part of the work, a study will be done, through models that relate the hydraulic coef cient to the soil moisture. For this part the reference (GENUCHTEN, 1980) will be used. In (GENUCHTEN, 1980), analytical models describing the relationship between hydraulic coefIcient, moisture and piezometric level were obtained. The theoretical models will be validated by comparing the theoretical curves and the experimental data acquired through sensors. As a complementary part of the work, numerical simulations will be done to analyze the behavior of the hydraulic coefIcient, with the different models approached.
Descrição
Palavras-chave
Coeficiente hidráulico, Granulometria, Solos, Umidade, Hydraulic coefficient, Granulometry, Soils, Moisture
Citação
GONÇALVES FILHO, J. C. C. Análise numérica de métodos empíricos do estudo da condutividade hidráulica. 2018. 106 f. Dissertação (Mestrado em Modelagem e Otimização) - Universidade Federal de Goiás, Catalão, 2018.