[en] A hierarchical control strategy is formulated for coordination of hydro and biomass electric energy cogeneration with two hierarchical coupled problems. The first problem under consideration concerns long-term strategies for hydroelectric system and forest development, so as to obtain a target biomass output yearly. The second problem schedules hydroelectric and biomass-powered plants to meet loads over a mid-term horizon, such that the use of either hydro or biomass resources are minimized. An optimal control and optimization methods are proposed for tile coordination of hydro and biomass electric energy cogeneration