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Since seepage-related problems account for the cause of more than forty percent of dam failure seepage analysis serves as one of the most significant stage in the design process of an embankment dam. Currently a steady seepage analysis in a typical or maximum cross section of the dam is formed instead of transient seepage analysis for simplicity. In this way, for the change of condition (unsaturated to saturated) in the first filling of dams and it’s effects on behavior and reaction of dams until the steady seepage condition established; the results of steady seepage analysis cannot be satisfactory. In this thesis, based on finite element method and with assumption of saturated-unsaturated... 

Tailings dams are considered as one of the most important geotechnical structures and due to the large amount of contaminated tailings deposited behind the dam, any failure of these structures, apart from loss of lives and properties, can be an environmental disaster. Researches show that most of the failure incidents in the last few decades have happened in tailings dams constructed using upstream method. As a result, it is of great significance to study the stability of upstream tailings dams.
The place of the phreatic line in the dam body plays a critical role in stability of tailings dams. Soil-atmosphere interaction effects such as precipitation, runoff, interception, infiltration,...