The paper deals with the responses of degraded dam-reservoir-foundation system with absorptive reservoir bottom. A two dimensional strong coupling methodology, in which dam and foundation are simulated by displacement and reservoir is by pressure is used to model the dam-reservoir-foundation system. The material properties of dam at different ages are predicted by an isotropic degradation index and a reflection coefficient is introduced to simulate the reservoir bottom absorption. From the present study, it is clear that the crest displacement increases with age of the dam. On the other hand, the principal stresses of dam and hydrodynamic pressure decrease with the age of dam. However, at later age of the dam, the effect of reservoir bottom absorption on the performance of dam-reservoir-foundation is quite less.