Effects of Hysteresis on Steady-State Infiltration in Unsaturated Slopes

Tami, Denny; Rahardjo, H.; Leong, Eng Choon

doi:10.1061/(asce)1090-0241(2004)130:9(956)

Cited by 55 publications

(33 citation statements)

References 19 publications

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“…In the slope model experiment by Tami et al (2004), seepage flow changed due to the soil layer with a relatively small permeability, located at the bottom of a slope. In the experiments of Tohari et al (2007) and Regmi et al (2014) elevated groundwater table caused the failure surface to form at the toe of a slope.…”

Section: Model Slope Experimentsmentioning

confidence: 99%

Behavior analysis by model slope experiment of artificial rainfall

Park

2016

Nat. Hazards Earth Syst. Sci.

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Abstract. In this study, we performed a model slope experiment with rainfall seepage, and the results were compared and verified with the unsaturated slope stability analysis method. In the model slope experiment, we measured the changes in water content and matric suction due to rainfall seepage, and determined the time at which the slope failure occurred and the shape of the failure. In addition, we compared and verified the changes in the factor of safety and the shape of the failure surface, which was calculated from the unsaturated slope stability analysis with the model experiment. From the results of experiment and analysis, it is concluded that the unsaturated slope stability analysis can be used to accurately analyze and predict rainfall-induced slope failure. It is also concluded that in seepage analysis, setting the initial conditions and boundary conditions is very important. If engineers will use the measured porewater pressure or matric suction, the accuracy of analysis can be enhanced. The real-time monitoring system of porewater pressure or matric suction can be used as a warning of rainfall-induced slope failure.

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Section: Model Slope Experimentsmentioning

confidence: 99%

Behavior analysis by model slope experiment of artificial rainfall

Park

2016

Nat. Hazards Earth Syst. Sci.

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“…Zeng (yijian@itc.nl) water recharge and unsaturated flow (Ghildyal and Tripathi, 1987;Mitkov et al, 1998;Tami et al, 2004). Its significance on assessing the hydrological process in the desert environment, which is the main plant community shaping process in arid ecosystems, is even magnified.…”

Section: Introductionmentioning

confidence: 99%

“…In order to do that, quantifying changes in infiltration properties by a reliable observation and measurement is needed. Previous studies has indicated the feasibility of using soil water content probes installed into the soil to track the propagation of the wetting front during infiltration (Topp et al, 1982;Noborio et al, 1996;Timlin and Pachepsky, 2002;Melone et al, 2006;Tami et al, 2004;Yang 2004Yang , 2006Wang et al, 2007Wang et al, , 2008Geiger and Durnford, 2000), and, therefore, to track the drying front during evaporation.…”

Section: Introductionmentioning

confidence: 99%

Diurnal pattern of the drying front in desert and its application for determining the effective infiltration

Zeng

Wan

et al. 2009

Hydrol. Earth Syst. Sci.

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Abstract. Located in western Inner Mongolia, the Badain Jaran Desert is the second largest desert in China and consists of a regular series of stable megadunes, among which over 70 permanent lakes exist. The unexpected lakes in desert attracted research interests on exploring the hydrological process under this particular landscape; however, a very few literatures exist on the diurnal and spatial variation of the drying front in this area, which is the main issue in the desert hydrological process to characterize the movement of water in soil. In order to understand the drying front in the Badain Jaran Desert, a field campaign was conducted by the observations of soil physical parameters and micrometeorological parameters. With the field data, the performance of a vadose zone soil water balance model, the HYDRUS, was verified and calibrated. Then, the HYDRUS was used to produce the spatial and temporal information of coupled water, water vapour and heat transport in sand to characterize the variation pattern of the drying front before, during and after the rainfall. Finally, the deepest drying front was applied to determine the effective infiltration, which is defined as the amount of soil water captured by the sand beneath the deepest drying front by infiltrating water of an incident rainfall event.

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“…Observa-se na literatura a existência de vários experimentos utilizando lisímetros para o estudo das variáveis hidrológicas (FELTRINI, 2009), influência do sistema de manejo (OLI-VEIRA, 2006;BARCELOS et al, 1999), perda de água por evapotranspiração (PERUCHI, 2009;MEDEIROS, 2002) e o efeito da chuva sobre taludes (VALLEJO, 1982;TAMI et al, 2004;SOARES, 2006), em que os autores concluíram que a modelagem mostrou ser uma ferramenta bastante útil para o entendimento do processo de movimento da água no solo.…”

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Avaliação do Processo de Infiltração da Água em um Solo Residual para Superfícies com Diferentes Declividades Utilizando Lisímetros

Paes¹,

Bernardes

2013

R. Águas Subter.

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This research paper evaluates the process of water infiltration in a residual soil of biotite-gneiss very weathered from the region of Paraíba Valley, SP, considering different slope inclinations, making use of a physical model. The model developed in the laboratory, consists of a lysimeter glass box with a simulated rainfall with spreaders. The residual soil was air dried and trimmed before insertion inside the lysimeter by layers of 3 cm, being compacted with a specified energy in order to reproduce the unit dry specific weight and void ratio close to the field values. During the test, each the parcels of water were evaluated by volumetric measurement and temporal relations. The wetting front development was registered with a digital camera. A complete soil characterization was carried out and soil characteristic curve were performed for test interpretation and modeling input. With the numerical model of Green-Ampt applied to the results it was possible to observe the influence of the slope inclination on the position of the wet front in relation to the transition zone. Increasing the slope inclination, the velocity of the wet front reduces which increase the transmission zone with a smooth front. This difference can reach about 36% between 5% and 50% slope inclination. Resumo: Este trabalho de pesquisa tem por objetivo avaliar o processo de infiltração da água em um solo residual de biotita-gnaisse muito intemperizado da região do Vale do Paraíba, SP, considerando a superfície do terreno com diferentes declividades, utilizando um lisímetro de laboratório. Ao lisímetro de laboratório construído em vidro, foram acoplados um simulador de chuva e um regulador de declividade. O solo foi inicialmente seco ao ar, destorro-ado e então depositado no interior do lisímetro em camadas de 3 cm, compactado de forma padronizada para atingir um índice de vazios semelhante ao campo. No decorrer dos ensaios, as parcelas do balanço hídrico foram avaliadas por meio de relações temporais e volumétricas. O avanço da frente de umedecimento foi monitorado por meio de câmera filmadora. Ensaios de caracterização geotécnica e determinação da curva característica foram executados para a obtenção dos parâmetros necessários à interpretação e modelagem teórica dos resultados. O modelo teórico de Green-Ampt permitiu representar a frente de umedecimento e a zona de transmissão, nas quais foi possível ob-servar a influência da declividade. O aumento da declividade provocou uma redução da velocidade do avanço da zona de transmissão em relação à frente de umedecimento. Essa diferença chegou, em média, a 36% entre a superfí-cie com 5% e 50% de declividade. Palavras-chave: Infiltração, Declividade da superfície, Lisímetro. _____________________________________________________________________ INTRODUÇÃO O crescimento acelerado e desordenado no Vale do Rio Paraíba do Sul vem comprome-tendo de forma alarmante os recursos hídricos da região os quais apresentam sérios sinais de dete-rioração. Dentro desse cenário os Comitês de Bacias Federais (CEIVAP)...

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Effects of Hysteresis on Steady-State Infiltration in Unsaturated Slopes

Cited by 55 publications

References 19 publications

Behavior analysis by model slope experiment of artificial rainfall

Behavior analysis by model slope experiment of artificial rainfall

Diurnal pattern of the drying front in desert and its application for determining the effective infiltration

Avaliação do Processo de Infiltração da Água em um Solo Residual para Superfícies com Diferentes Declividades Utilizando Lisímetros

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