Abstract:
In order to meet the updated requirements of the Portuguese Dam Safety
Legislation, Salamonde dam (double curvature arch dam, dated 1955) hydraulicoperational
safety assessment has been developed by EDP, including the review of the
design flood and the evaluation of safety devices capacity. Thereafter some corrective
measures were implemented, including the construction of a new complementary
spillway. The paper summarizes the main features of the new spillway design, developed
by AQUALOGUS. The selected solution is a gate-controlled ogee crest, followed by a
120 m long curved tunnel scoped in the slope of the right bank designed for a discharge
of 1233 m3/s. The hydraulic performance of the designed structure was analysed by a
study developed on a hydraulic physical model, built at LNEC on an approximate scale of
1/50. Part of the results and conclusions that allowed improving the design structure
shapes is described. Some aspects of interesting and nowadays challenging ongoing
works of this new spillway are presented.
