الفهرس | Only 14 pages are availabe for public view |
Abstract In this thesis, SEEP2D and SEEP/W numerical models are implemented to model seepage through earth dams with internal cores. In order to evaluate the two models’ performance, they were compared in cases with no core, vertical core, and wedgeshaped core. SEEP/W was then used to study further cases due to its accuracy in drawing the phreatic line within the core zone. The effect of the core’s characteristics on the amount of discharge, and the phreatic line’s levels at the core’s upstream and downstream faces were investigated. Four core types – vertical, wedge-shaped, upstream inclined, and downstream inclined – were considered. Different hydraulic conductivities, upper widths, and core slopes were also evaluated. The wedgeshaped core is the most effective of those investigated in reducing seepage discharge and the phreatic line’s level at the core’s downstream face, the vertical core came second. Design equations are provided for all the core shapes considered in the study. |