The stored water is mainly used for agricultural
irrigation, with corn as the most important product
of this area. The water demand is thus consider-
able downstream of the dam Secretar´ıa de Re-
cursos Hidr´aulicos, 1990.. The Alzate Reservoir
ecosystem is being deteriorated with increasing
microbial contamination, which favors the growth
of water hyacinth Eichhornia crassipes..