Design of unsteady filtration in the upper water-resistant prism of earthfill dams given horizontal drainage layers in the base

The article presents the results of the study of unsteady filtration in the upper water-resistant prism of dams given horizontal drainage layers in the base. Design methods have been developed for unsteady filtration in the upper water-resistant prism of dams, given horizontal drainage layers in the base. Research main results have been presented for the number of schemes of drainage in the upper waterresistant prism of dams. Experimental research has been carried out to check the validity of accepted assumptions when deriving relationships for the filtration design of earthfill dams with horizontal drainage layers and assess the accuracy of the solutions obtained. Experimental research on processes under consideration for physical models has shown a good resemblance with the results obtained from numerical calculations. This makes it possible to confirm the validity of chosen design schemes and accepted initial assumptions in numerical studies.