ANSWERS2000, a watershed scale, physically-based, and distributed model was applied to simulate sediment and runoff from two small watersheds located in the Three Gorges area. Based on the comparison of simulated results between two different watersheds, the model was evaluated by three various ways including percent error, linearity regression, and Nash-Sutcliffe model efficiency. The study showed that the model performed well when using it for the simulation and the simulated results caught the observed highly. However, the model performed with high percentage error when it was used on forest lands simulation and the model efficiency needed to be improved later.