According to this Spanish-language blog post by the Fundacion Solon, thousands of people will be displaced by the planned mega-dams. In the case of El Bala and Chepete, the environmental files and their appendices list 3,214 people inside the reservoirs and 1,950 people in the adjoining areas will be displaced.
Social impacts of Chepete, El Bala, Rositas and Cachuela Esperanza