Effect of rainfall infiltration into unsaturated soil using soil column

Ibrahim, Aniza; Mukhlisin, Muhammad; Jaafar, Othman

doi:10.1063/1.5022916

Cited by 7 publications

(7 citation statements)

References 9 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…This result revealed that high intensity rainfall led to low soil permeability. This was mainly because the gas in the bottom soil pores cannot be discharged in time due to the rapid infiltration of water, thereby forming pore gas pressure for water infiltration (Ibrahim, Mukhlisin, & Jaafar, ; Prunty & Bell, ; Xue, Tong, Hao, & Wang, ). Therefore, a high rainfall intensity did not result in a significant increase in volumetric water contents at lower soil depths.…”

Section: Discussionmentioning

confidence: 99%

Effects of rainfall intensity and compaction on water transport from opencast coal mine soils: An experimental study

Wang

2019

Hydrological Processes

View full text Add to dashboard Cite

The use of heavy machinery during opencast coal mining can result in soil compaction. Severe soil compaction has a negative impact on the transport of water and gas in the soil. In addition, rainfall intensity has traditionally been related to soil surface sealing affecting water transport. To assess the effects of rainfall intensity and compaction on water infiltration and surface runoff in an opencast coal mining area, the disturbed soils from the Antaibao opencast mine in Shanxi Province, China, were collected. Four soil columns with different bulk densities (i.e., 1.4 g cm‐3, 1.5 g cm‐3, 1.6 g cm‐3, and 1.7 g cm‐3) were designed, and each column received water five times at rainfall intensities of 23.12, 28.91, 38.54, 57.81, and 115.62 mm hr‐1. The total volume of runoff, the time to start runoff, and the volumetric water contents at the depths of 5 cm, 15 cm, 25 cm, 35 cm, 45 cm, 55 cm, and 65 cm were measured. Under the same soil bulk density, high rainfall intensity reduced infiltration, increased surface runoff, and decreased the magnitude of change in the volumetric water contents at different depths. Under the same rainfall intensity, the soil column with a high bulk density showed relatively low water infiltration. Treatments 3 (1.6 g cm‐3) and 4 (1.7 g cm‐3) had very small changes in volumetric water contents of the profiles even under a lower rainfall intensity. Severe soil compaction was highly prone to surface runoff after rainfall. Engineering and revegetation measures are available to improve compacted soil quality in dumps. Our results provide a theoretical basis for the management of land reclamation in opencast coal mine areas.

show abstract

Section: Discussionmentioning

confidence: 99%

Effects of rainfall intensity and compaction on water transport from opencast coal mine soils: An experimental study

Wang

2019

Hydrological Processes

View full text Add to dashboard Cite

show abstract

“…Top-layer soils have reduced matric suction due to rainfall infiltration [4], which in turn reduces soil strength. The mechanism of rainfall infiltration is complex due to the high nonlinearity of soil water characteristics and soil permeability [5].…”

Section: Field Infiltration Monitoringmentioning

confidence: 99%

Study of the Rainfall Infiltration Effect and Soil Strength Variation on Unsaturated Laterite Terraces

Chung¹

2019

World Congress on Civil, Structural, and Environmental Engineering

View full text Add to dashboard Cite

The lateritic terraces of northern Taiwan have unsaturated soil due to their higher elevation and deeper groundwater level. Under the effects of rainfall infiltration and surface evaporation, the topsoil often changes in humidity; thus, the soil strength also changes. As there are a large number of structures in these terraces, it is necessary to further understand the influence of rainwater infiltration in order to design a safe and economical foundation structure. In this paper, tensiometers were installed in-situ to observe changes in soil matric suction. An undisturbed soil column was taken and drying and wetting tests were conducted to understand the depth of water infiltration. Meanwhile, a direct shear test was performed using specimens with different water contents taken from the soil column. The corresponding soil matric suction was derived from the relationship of the soil water content and tensiometer readings of the tests. The results showed that, during rainwater infiltration, the soil near the surface reacted immediately. The influence of the rainwater infiltration reached about 120 cm below the surface. The soil shear strength decreased with the increasing soil moisture content. In other words, rainfall would reduce the soil matric suction and the shear strength of the soil would decrease.

show abstract

“…Porém, alguns destes estudos que tem sido conduzido em laboratório, utilizaram tensiômetros e simulações de chuva em colunas de acrílico contendo um único tipo de solo, visando o estudo das características hidrodinâmicas dos solos (LEIJ et al, 2006;IBRAHIM et al, 2014). Contudo Leij et al (2006) deixa claro que o uso de colunas homogêneas, as quais são compostas por um único tipo de solo, são utilizadas, basicamente, nas modelagens para pequenas profundidades (0-2000 mm).…”

Section: Introductionunclassified

Predição do escoamento superficial e consequentes alagamentos em centros urbanos

Holanda

Soares

Oliveira

2020

RICA

View full text Add to dashboard Cite

Os alagamentos são um problema em vários centros urbanos decorrentes da descaracterização natural do solo e do aumentando do escoamento superficial. A caracterização hidrodinâmica dos solos pode ser realizada por ensaios de campo ou laboratoriais visando a predição destes alagamentos. Sendo assim, objetivou-se estimar o escoamento superficial de água no solo por meio de simulações utilizando o Hydrus-1D, para explicar os alagamentos que ocorrem numa área urbana. Para obtenção dos parâmetros hidrodinâmicos seguiu-se a metodologia do Beerkan of Estimation Soil Transfer (BEST) realizada em laboratório com colunas de acrílico e dois solos distintos, enquanto que as simulações do escoamento superficial foram feitas com Hydrus-1D. Por meio das curvas de infiltração verificou-se que o solo menos arenoso possui uma capacidade de infiltração menor. A primeira simulação mostrou que o escoamento superficial cumulativo foi de 355,67 mm dia-1 enquanto que na segunda simulação o escoamento superficial acumulado foi de 362,03 mm dia-1. A realização dos ensaios de infiltração apenas na superfície do perfil do solo podem acarretar em resultados imprecisos, uma vez que a discrepância entre os valores simulados do escoamento superficial chegam a 105,14%. Deste modo, para uma estimativa de escoamento superficial mais precisa são necessários sucessivos ensaios de infiltração em diferentes profundidades.

show abstract

Effect of rainfall infiltration into unsaturated soil using soil column

Cited by 7 publications

References 9 publications

Effects of rainfall intensity and compaction on water transport from opencast coal mine soils: An experimental study

Effects of rainfall intensity and compaction on water transport from opencast coal mine soils: An experimental study

Study of the Rainfall Infiltration Effect and Soil Strength Variation on Unsaturated Laterite Terraces

Predição do escoamento superficial e consequentes alagamentos em centros urbanos

Contact Info

Product

Resources

About