Simulation of seepage flow through an earthen dam with vertical drain and comparison of results with observations data (
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ORIGINAL PAPER
Simulation of seepage flow through an earthen dam with vertical drain and comparison of results with observations data (case study: Harreza dam-Algeria) Mustafa Chouireb 1 & AbdelkaderDjehiche 1 Received: 7 October 2018 / Accepted: 16 May 2019 / Published online: 25 June 2019 # Saudi Society for Geosciences 2019
Abstract Seepage analysis is very important issues that should be considered at designing of an earthen dam. For this purpose, a research study was conducted on Harreza dam, which is an earthen dam located at about 15 km, south-west of El-Khmiss city, Algeria. In the study, the amount of seepage through and under body of the main dam is computed; profile of phreatic line is simulated for different scenarios and compared with the observed data. For this study, SEEP/W, the sub-program of Geo-Slope software is used. Data pertaining to design parameters and dam geometry are given as input to the software to compute the unknown parameters. Validation of the model is made by comparing simulated results against the observed ones; this is done to ensure model applicability. The comparison shows a high efficiency and good fitness. Keywords Seepage analysis . Phreatic line . Earthen dam . SEEP/W . Finite element modeling
Introduction Dam’s failures and incidences have been taking place all over the world over a long period in history. Effects of dam’s failure on man and environment are well known. These require both preventive and mitigation measures. About 40%, 25%, and 35% of failures of earth dams are due to hydraulic, structural, and seepage failures respectively (OmofunmiO. E. and al, 2017). The seepage control of any dam may be analyzed by virtue of various available methods. It is the main aspect, and its control enjoys main position in designing, construction, and maintenance of any dam (Imran Arshad, 2014). The main difficulty in diagnosing the seepage problems is fixing the location of Editorial handling: Helder I. Chaminé * Mustafa Chouireb [email protected] AbdelkaderDjehiche [email protected] 1
Research Laboratory of Water Resources, Soil and Environment (RLWRSE), Laghouat University, Laghouat, Algeria
phreatic surfaces; which at initial stages cannot be fixed and thus requires iterative processes (Hasani H, 2013) .The seepage analysis of a dam is essential for the evaluation of its safety and stability especially by using numerical techniques; by doing this, one can analyze seepage field and make its comparison under different conditions; the effect of other assorted factors can be also investigated (Quanshu and Jianjun, 2010). In order to achieve the objectives of this study, Geostudio software is used. Geostudio is software products based on finite element code that can be used to evaluate the performance of dams and levees with varying levels of complexity. The Geostudio suite includes eight products: SLOPE/W for slope stability, SEEP/W for groundwater seepage, SIGMA/W for stress-deformation, QUAKE/W for dynamic earthquake, TEMP/W for geothermal, CTRAN/W for conta
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