Determination of Water Retention and Unsaturated Hydraulic Conductivity of Brahmaputra Sand

Malaya C*, Sreedeep**
* Assistant Professor, Department of Civil Engineering, Assam Engineering College, Guwahati, Assam, India.
** Associate Professor, Department of Civil Engineering, Indian Institute of Technology, Guwahati, Assam, India.
Periodicity:September - November'2015
DOI : https://doi.org/10.26634/jce.5.4.3639

Abstract

Unsaturated soils with hydraulic properties such as water retention and hydraulic conductivity are considered to be the most crucial parameters for modeling flow process in unsaturated soils. Experimental determination of unsaturated hydraulic conductivity (ku ) is a challenging task and it requires a costly and skilled experimentation. Therefore, the normal practice is to estimate ku from water retention characteristics. Water Retention Characteristic (designated as WRC) includes the development of a graphical relationship between suction and water content (gravimetric or volumetric). This indicates that the accuracy of ku is very much dependent on the unambiguous determination of WRC. In this study, a tensiometer and volumetric water content probe have been used to measure soil suction and volumetric water content, respectively of a local sand by using two different measurement procedures. The ku of the soil has been estimated based on the WRC obtained. The main purpose of this investigation is to understand the extent of influence of different WRC measurement procedures on ku estimation. The study indicates that the measurement procedures have moderate influence on uniqueness of WRC of Brahmaputra sand and hence the estimated ku.

Keywords

Sandy Soil, Soil Suction, Volumetric Water Content, Water Retention Characteristic, Unsaturated Soil Hydraulic Conductivity, Measurement, Estimation.

How to Cite this Article?

Malaya.C., and Sreedeep.S. (2015). Determination of Water Retention and Unsaturated Hydraulic Conductivity of Brahmaputra Sand. i-manager’s Journal on Civil Engineering, 5(4), 14-20. https://doi.org/10.26634/jce.5.4.3639

References

[1]. Averjanov, S. F, (1950). “About permeability of subsurface soils in case of incomplete saturation”, English collection 7, In The Theory of Ground Water Movement, 19-21.
[2]. ASTM D854-06?1, (2006). “Standard test methods for specific gravity of soil solids by water pycnometer”, Annual Book of ASTM Standards, ASTM International, West Conshohocken, PA.
[3]. ASTM D422-63, (2007). “Standard test method for particle-size analysis of soils. Annual Book of ASTM Standards”, ASTM International, West Conshohocken, PA.
[4]. ASTM D4254-00, (2006). “Standard test methods for minimum index density and unit weight of soils using a vibratory table”, Annual Book of ASTM Standards, ASTM International, West Conshohocken, PA.
[5]. ASTM D4253-00, (2006). “Standard test methods for maximum index density and unit weight of soils using a vibratory table”, Annual Book of ASTM Standards, ASTM International, West Conshohocken, PA.
[6]. ASTM D2487-06? , (2008). “Standard practice for 1 classification of soils for engineering purposes (Unified Soil Classification System)”, Annual Book of ASTM Standards, ASTM International, West Conshohocken, PA.
[7]. Bogena, H. R., Huisman, J. A., Oberdorster, C., & Vereecken, H, (2007). “Evaluation of a low-cost water content sensor for wireless network applications”, Journal of Hydrology, Vol.344, pp.32-42.
[8]. Borana, L, (2008). “Performance evaluation of volumetric water content sensors for cohesionless soils”, M. Tech. Thesis, Department Civil Engineering, Indian Institute of Technology Guwahati, India.
[9]. Brooks, R. H., & Corey, A. T, (1964). “Hydraulic properties of porous medium”, Hydrology paper No. 3, Civil Engineering Department, Colorado State University, Colo.
[10]. Campbell, J. D. (1973). “Pore pressures and volume changes in unsaturated soils”, Ph. D. thesis, University of Illinois at Urbana-Champaign, Urbana-Champaign, ILL.
[11]. Fredlund, D. G., Xing, A., & Huang, S, (1994). “Predicting the permeability function for unsaturated soils using the soil-water characteristic curve”, Canadian Geotechnical Journal, Vol.31, pp.533-546.
[12]. Gardner, W. R, (1958). “Some steady state solutions of the unsaturated moisture flow equation with application to evaporation from a water table”, Soil Science, Vol.85, pp.228-232.
[13]. Gribb, M. M., Kodesova, R., & Ordway, S. E, (2004). “Comparison of soil hydraulic property measurement methods”, Journal of Geotechnical and Geo environmental Engineering, Vol.130(10), pp.1084-1095.
[14]. Kizito, F., Campbell, C. S., Campbell, G. S., Cobos, D. R., Teare, B. L., Carter, B., & Hopmans, J. W, (2008). “Frequency, electrical conductivity and temperature analysis of a low-cost capacitance soil moisture sensor”, Journal of Hydrology, Vol.352, pp.367-378.
[15]. Lee, H. C., & Wray, W. K, (1995). “Techniques to evaluate soil suction - A vital unsaturated soil variable”, Proceedings of the First International Conference on Unsaturated Soils, Paris, Vol.2, pp.615-621.
[16]. Malaya, C., & Sreedeep, S, (2010). “A study on the influence of measurement procedures on suction-water content relationship of a sandy soil”, Journal of Testing and Evaluation, Vol.38(6), pp.9 pages.
[17]. Montanez, J. E. C, (2002). “Suction and volume changes of compacted sand-bentonite mixtures”, Ph. D. Thesis, Imperial College of Science, Technology and Medicine, University of London.
[18]. Mualem, Y, (1976). “A new model for predicting the hydraulic conductivity of unsaturated porous media”, Water Resource Research, Vol.12, pp.513-522.
[19]. Mualem, Y, (1986). “Hydraulic conductivity of unsaturated soils: Prediction and formulas. Methods of Soil Analysis”, Part 1. Physical and mineralogical methods. Second edition. Agronomy. Edited by A. Klute. American Society of Agronomy, Inc. and Soil Science of America, Inc. Madison, WI, USA, pp.799-823.
[20]. Rawls, W. J., Gish, T. J., & Brakensiek, D. L, (1991). “Estimating soil water retention from soil physical properties and characteristics”, Advances in Soil Science, 6, Springer-Verlag, New York, pp.213-234.
[21]. Sreedeep, S., & Singh, D. N, (2005). “A study to investigate influence of soil properties on its suction”, Journal of Testing and Evaluation, Vol.33(1), pp.579-584
[22]. Stannard, D. I, (1994). “Tensiometers – theory, construction, and use”, Geotechnical Testing Journal, Vol.15(1), pp.48-58.
[23]. Stephens, D. B, (1996). “Vadose zone hydrology”, CRC Press Inc. Lewis Publishing, New York.
[24]. Thieu, N. T. M., Fredlund, M. D., Fredlund, D. G., & Vu, H. Q, (2001). “Seepage modeling in a saturated/unsaturated soil system”, Proceedings of the International Conference on Management of the Land and Water Resources, Hanoi, Vietnam, 20-22 October. Edited by N. T. Tien, 49- 56.
[25]. UMS GmbH, (2001). “T5 user manual”, Version 1.8, Munich.
[26]. Van Genuchten, M. Th, (1980). “A closed-form equation for predicting the hydraulic conductivity of unsaturated soils”, Soil Science Society of America Journal, Vol.44, pp.892-898.
[27]. Van Genuchten, M. Th., Leij, F. J. & Yates, S. R, (1991). “The RETC code for quantifying the hydraulic functions of unsaturated soils”, US EPA, ADA, EPA/600/2-91/065, 85p.
[28]. Yates, S. R., Van Genuchten, M. Th., Warrick, A., & Leij, F. J, (1992). “Analysis of measured, predicted and estimated hydraulic conductivity using the RETC computer program”, Soil Science Society of America Journal, Vol.56, pp.347-354.
[29]. Zaradny, H. K. (1993). “Groundwater flow in saturated and unsaturated soil”, A. A. Balkema, Rotterdam, Brookfield.
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