Assessment of the Performance of a Modified USBR Type II Stilling Basin by a Validated CFD Model

The adaptation of existing dams is paramount importance to face the challenge posed by climate change and new legal frameworks. Thus, it crucial optimize design stilling basins reduce hydraulic jump dimensions without jeopardizing energy dissipation in structure. A numerical model was developed simulate a US Bureau Reclamation Type II basin. validated with specifically designed physical then used test performance basin after adding second row chute blocks. results showed reduction terms sequent depth ratio roller length, which were respectively 2.5% 1.4% lower modified design. These would allow an estimated increase discharge close 10%. Furthermore, this had 1.2% higher efficiency. Consequently, modifications proposed for suggest improved issue length estimation also discussed, different approaches introduced compared. methods follow structured systematic procedure gave consistent models.