Rainwater Infiltration Characteristics in the Unsaturated Soil : Comparison of Finite Element Model with Experimental Results

doi:10.7857/JSGE.2011.16.6.027

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2011 Vol.16, Issue 6 Preview Page Next Page

Rainwater Infiltration Characteristics in the Unsaturated Soil : Comparison of Finite Element Model with Experimental Results 불포화 토양에서 빗물의 침투특성 : 유한요소 모델과 실험결과 비교: 유건선;김상래;김충일;윤현식;한무영;
Yoo, Kun-Sun;Kim, Sang-Rae;Kim, Tschung-Il;Yoon, Hyun-Sik;Han, Moo-Young;

31 December 2011. pp. 27 ~ 33

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Abstract

Infiltration plays an important role in the urban water cycle. Infiltration has a potential to contribute to groundwater recharge in addition to runoff reduction. However, infiltration in urban areas has been considered only as a means of runoff reduction. Conventional design methods for infiltration facilities assume soils to be fully-saturated for the sake of simplicity. The amount of groundwater recharge can not be estimated properly with this scheme. Hence, the characteristics of the unsaturated soil condition need to be considered. The finite element model using SEEP/W to estimate infiltration under the unsaturated condition is presented. Infiltration tests for Joomonjin sand are performed and the infiltration behavior of Joomoonjin sand under the unsaturated condition is measured experimentally to verify the validity of the finite element model. The results from comparing infiltrated volume between the saturated and the unsaturated conditions under the same soil and rainfall conditions show that the infiltrated volume in the unsaturated condition is two times bigger than that in the saturated condition.

Keywords

Rainwater infiltration;Unsaturated soil;Finite element model;

References

Fredlund, D.G. and Xing, A., 1994, Prediction of the permeability function for unsaturated soils using the soil water characteristics curve, Can. Geotechnical J., 31, 533-546.10.1139/t94-062
Fredlund, D.G. and Rahardjo, H., 1993, Soil Mechanics for Unsaturated Soils, John Wiley & Sons, New York, 517p.
Fredlund, D.G. and Rahardjo, H., 1993, Soil Mechanics for Unsaturated Soils, John Wiley & Sons, New York, 517p.
Green, R.E. and Corey, J.C., 1971, Calculation of hydraulic conductivity: A further evaluation of some predictive methods, Soil Science Society of America Proc., 5, 3-8.
James, F.C., Mohsen, M.S., and Vijay, P.S., 2007, Elementary hydraulics, Thomson Nelson, Toronto, 560p.
Krahn, J. 2004, Seepage Modeling with SEEP/W, Geo-Slope International Ltd, Calgary.
Lu, N. and Likos, W.J., 2004, Unsaturated Soil Mechanics, John Wiley & Sons, Hoboken, New Jersey, 398p.
Miyazaki, T., 2006, Water Flow in Soils, 2nd ed., Taylor and Francis London, 418p.
Mualem, Y., 1976, A new model for predicting the hydraulic conductivity of unsaturated porous media, Water Resource Research, 12, 513-522.10.1029/WR012i003p00513
Van Genuchten, M.T., 1980, A closed-form equation for predicting the hydraulic conductivity of unsaturated soils, Soil Science Society of America J., 44, 892-898.10.2136/sssaj1980.03615995004400050002x

Information

Publisher :The Korean Society of Soil and Groundwater Environment
Publisher(Ko) :한국지하수토양환경학회
Journal Title :Journal of Soil and Groundwater Environment
Journal Title(Ko) :지하수토양환경
Volume : 16
No :6
Pages :27 ~ 33
DOI :https://doi.org/10.7857/JSGE.2011.16.6.027

[1] Fredlund, D.G. and Xing, A., 1994, Prediction of the permeability function for unsaturated soils using the soil water characteristics curve, Can. Geotechnical J., 31, 533-546.10.1139/t94-062

[2] Fredlund, D.G. and Rahardjo, H., 1993, Soil Mechanics for Unsaturated Soils, John Wiley & Sons, New York, 517p.

[3] Fredlund, D.G. and Rahardjo, H., 1993, Soil Mechanics for Unsaturated Soils, John Wiley & Sons, New York, 517p.

[4] Green, R.E. and Corey, J.C., 1971, Calculation of hydraulic conductivity: A further evaluation of some predictive methods, Soil Science Society of America Proc., 5, 3-8.

[5] James, F.C., Mohsen, M.S., and Vijay, P.S., 2007, Elementary hydraulics, Thomson Nelson, Toronto, 560p.

[6] Krahn, J. 2004, Seepage Modeling with SEEP/W, Geo-Slope International Ltd, Calgary.

[7] Lu, N. and Likos, W.J., 2004, Unsaturated Soil Mechanics, John Wiley & Sons, Hoboken, New Jersey, 398p.

[8] Miyazaki, T., 2006, Water Flow in Soils, 2nd ed., Taylor and Francis London, 418p.

[9] Mualem, Y., 1976, A new model for predicting the hydraulic conductivity of unsaturated porous media, Water Resource Research, 12, 513-522.10.1029/WR012i003p00513

[10] Van Genuchten, M.T., 1980, A closed-form equation for predicting the hydraulic conductivity of unsaturated soils, Soil Science Society of America J., 44, 892-898.10.2136/sssaj1980.03615995004400050002x

Journal of Soil and Groundwater Environment ISSN:1598-6438(Print) 2287-8831(Online) 지하수토양환경

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