Investigation on the Effects of Hydraulic Conductivity Function in Unconfined Seepage Analysis (Case study: Hassanlu Earth Dam)

Document Type : Original Article

Authors

1 Assistant Professor, Department of Water Engineering , Faculty of Agriculture, Urmia University., Urmia., Iran

2 Assistant Professor, Department of Water Engineering , Faculty of Agriculture., Urmia University., Urmia., Iran

Abstract

In this research the emphasis of the application of hydraulic conductivity function in seepage analysis through in homogenous and nonhomogeneous medium was investigated. For this aim, different forms of flow in mentioned mediums were analyzed via a finite element numeric model based on hydraulic properties were selected from unsaturated soils database (UNSODA). In order to validate the results annual recorded data in Hassanlu earth dam was used.  The results showed, in nonhomogeneous medium as well as zoned earth dams, the role of downstream material is more significant. Furthermore, the phreatic line in the state of employing constant conductivity in instead in conductivity function rises rapidly in the conditions of rising water lever at the boundaries while in drawdown it drain faster. Comparison between filed data and model results also showed to get realistic results employing of hydraulic conductivity in the form function is essential at least for downstream materials.
 

Keywords

References

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Iranian Journal of Irrigation & Drainage
Volume 8, Issue 3 - Serial Number 47
November and December 2014
Pages 430-442

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