Historical impact of deforestation and river modification on the morphology of the southern gulf coast of Mexico

Abstract

The Mezcalapa-Grijalva-Usumacinta watershed systems have experienced continuous human-made alterations since the 17th century. The alteration of the hydro-sediment balance has affected the morphodynamics of the delta with conspicuous impacts on the evolution of the shoreline. Historical maps and narratives are helpful to assess these changes at different spatial and temporal scales. The results emphasize the role of historical archives, maps, and aerial photographs as valuable tools for understanding altered ecological processes in large watersheds.