The Guayas River Basin crosses the provinces of Manabí, Guayas, Santa Elena, Cañar, Riobamba, Bolívar, Los Ríos, Cotopaxi and Santo Domingo de los Tsáchilas.
Map source:https://www.eluniverso.com/noticias/2014/07/23/nota/3272521/suenos-que-inspira-rio-guayas/
Own work
Michael Barbotó