Seepage analysis of Upper Gotvand Dam concerning gypsum karstification (2D and 3D approaches)

  • Jamshid Sadrekarimi
  • Majid Kiyani
  • Behnam Fakhri
  • Mohammad Javad Vahdatirad
  • Amin Barari
Research Article
  • 146 Downloads

Abstract

Upper Gotvand Dam is constructed on the Karun River at the south west of Iran. In this paper, 2D and 3D models of the dam together with the foundation and abutments were established, and several seepage analyses were carried out. Then, the gypsum veins that are scattered throughout the foundation ground were included in the models, and the seepage pattern, considering the dissolution law of gypsum, was analyzed. It was disclosed that the discharge fluxes obtained from 2D and 3D analyses are not similar, and the discharge flux in 3D model is about four times that of the 2D model. Also, the 3D model locates the phreatic surface somewhat higher than the 2D model. This means that the 2D model estimates lower pore water pressure pattern in comparison with the 3D model. These may be attributed to the fact that with 2D model the lateral components of vectors of seepage velocity are ignored. In the current case, the rate of increase of discharge flux due to dissolution of gypsum veins was obtained to be a thirdorder function of the aperture width. In spite of the fact that the grout curtain is designed to be about 170 m deep, however, complete dissolve of gypsum will severely increase the discharge flux through the foundation ground.

Keywords

Upper Gotvand Dam seepage analysis gypsum veins 3D model discharge flux 

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References

  1. 1.
    Jeschke A A, Vosbeck K, Dreybrodt W. Surface controlled dissolution rates of gypsum in aqueous solutions exhibit nonlinear dissolution kinetics. Geochimica et Cosmochimica Acta, 2001, 65(1): 27–34CrossRefGoogle Scholar
  2. 2.
    Ford D C, Williams P W. Karst Geomorphology and Hydrology. London: Unwin Hyman Ltd, 1994Google Scholar
  3. 3.
    Calcano C E, Alzura P R. Problems of dissolution of Gypsum in dam Sits. Bulletin of the Venezuelan Society on Soil Mechanic & Foundation Engineering, July–September, 1967, 75–80Google Scholar
  4. 4.
    Serafim J L, Santos A P, Matos M S. Tridimensional seepage through a dam foundation. In: Proceeding of ICOLD Lausanne. Lausanne: ICOLD, 1985Google Scholar
  5. 5.
    Uromeihy A, Barzegari G. Evaluation and treatment of seepage problems at Chapar-Abad Dam, Iran. Engineering Geology, 2007, 91(2–4): 219–228CrossRefGoogle Scholar
  6. 6.
    Ghobadi M H, Khanlari G R, Djalaly H. Seepage problems in the right abutment of the Shahid Abbaspour dam, southern Iran. Engineering Geology, 2005, 82(2): 119–126CrossRefGoogle Scholar
  7. 7.
    Ahmed A A. Stochastic analysis of free surface flow through earth dams. Computers and Geotechnics, 2009, 36(7): 1186–1190CrossRefGoogle Scholar
  8. 8.
    Fredlund D G, Rahardjo H. Soil Mechanics for Unsaturated Soils. New York: John Wiley & Sons, 1993Google Scholar
  9. 9.
    GEO-SLOPE International Ltd. Seep3D User’s Guide. Version 1.1. Alberta: Calgary, 2002Google Scholar
  10. 10.
    Sadrekarimi J, Saghafi M. Stress dependent permeability effects on ground water flow. Amir Kabir Journal of Science and Technology, 2003, 4(53): 35–42Google Scholar
  11. 11.
    Freeze R A. Influence of the unsaturated flow domain on seepage through earth dams. Water Resources Research, 1971, 7(4): 929–942CrossRefGoogle Scholar
  12. 12.
    Mahab G C E. Report of International Expert Panel on Upper Gotvand Dam & HEPP. Tehran: Mahab Ghods Consulting Engineers, 2005Google Scholar
  13. 13.
    Fell R, Mac Gregor P, Stapledon D. Geotechnical Engineering of Embankment Dams. Rotterdam: Balkema A A, 1992Google Scholar
  14. 14.
    Blyth F G H, de Freitas M H. A Geology for Engineers. 7th Edition. Oxford, UK: Butterworth-Heinemann, 1984, 87Google Scholar
  15. 15.
    Romanov D, Gabrovsek F, Dreybrodt W. Leakage below dam sites in limestone terrains by enhanced karstification: A modeling approach. Environmental Geology, 2007, 51(5): 775–779CrossRefGoogle Scholar
  16. 16.
    Romanov D, Gabrovsek F, Dreybrodt W. Dam sites in soluble rocks: a model of increasing leakage by dissolutional widening of fractures beneath a dam. Engineering Geology, 2003, 70(1): 17–35CrossRefGoogle Scholar

Copyright information

© Higher Education Press and Springer-Verlag Berlin Heidelberg 2011

Authors and Affiliations

  • Jamshid Sadrekarimi
    • 1
  • Majid Kiyani
    • 1
  • Behnam Fakhri
    • 1
  • Mohammad Javad Vahdatirad
    • 2
  • Amin Barari
    • 3
  1. 1.Faculty of Civil EngineeringUniversity of TabrizTabrizIran
  2. 2.Faculty of Civil EngineeringUniversity of MazandaranBabolIran
  3. 3.Department of Cicil EngineeringAalborg UniversityAalborgDenmark

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