The large amplitude M2 tidal wave presents a unique phase shift of six hours at both sides of the narrow (7km) Ameghino Isthmus in Valdés Península, on the patagonic argentinean coast. For this fact, the site has been recognized for a long time as a potentielly important tidal power generation resource. In the first part of this paper we present a study of the M2 natural regime employing a two-dimensional vertically integrated FEM model. Model results are in good agreement with measured coastal elevations and phases. Next we analyse possible effects of tidal power plants operation in the modeled tidal flow. Tentative estimates shows a diminishing net available head for great barrages, thus limiting the seize of the proposed plants.

Fil: Palma, Elbio Daniel. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Bahía Blanca. Instituto Argentino de Oceanografía. Universidad Nacional del Sur. Instituto Argentino de Oceanografía; Argentina