Hidrología isotópica de la influencia de una tormenta en la descarga natural del agua subterránea en la Sierra de Monte Alto.

Abstract

One of the principal recharge zones of aquifers beneath Mexico City is the Monte Alto range which forms the west side of the Basin of Mexico. A storm runoff analysis using environmental iso topes and chemical data was effected, including hydrogeological field observations in a small basin near the summit of the range. The basin is underlain by andesitic rocks intcrbcddl,d with pyrodastics. Results show that intiltration in this zone could be grcater than 70% of precipitation. An anomaly in the hydrograph separation suggests three runoff components: eapillary finge water which is more important than we expectcd; a storm water component; and a component attributed to groundwater.