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En el presente trabajo se determino la susceptibilidad actual a procesos de erosion hidrica y procesos gravitacionales en la subcuenca de alta montana del rio Jamapa en el flanco Norte del volcan Citlaltepetl o Pico de Orizaba. El estudio se llevo a cabo mediante el empleo de Sistemas de Informacion Geografica (SIG), con la aplicacion los modelos USLE y Mora-Vahrson. Los resultados mostraron una concordancia de ambos modelos de acuerdo con la distribucion de los mayores grados de susceptibilidad. Contrario a lo que se esperaba, los modelos arrojaron mayores susceptibilidades tanto de erosion hidrica como a procesos gravitacionales en la parte baja y media de la subcuenca, lo cual se debe a que los principales activadores hidricos se presentan con mayores indices en las partes bajas y disminuyen con la altitud. Palabras clave: Erosion hidrica; remocion en masa; susceptibilidad; Citlaltepetl (Pico de Orizaba); Sistemas de Informacion Geografica Abstract In the present work, the current susceptibility to water erosion- and gravitational processes in the high mountain sub-basin of the Jamapa River on the North flank of the Citlaltepetl or Pico de Orizaba volcano was determined. The study was carried out through the employment of Geographic Information Systems (GIS), with the application of the ERU and Mora-Vahrson models. The results show a concordance of both models according to the distribution of the highest degrees of susceptibility. Contrary to what was expected, the models show a greater susceptibility to both water erosion and gravitational processes in the lower and middle part of the sub-basin, which is due to the fact that the main water activators are presented with higher rates in the lower parts and decrease with altitude. Keywords: Water Erosion; Mass Removal; Susceptibility; Citlaltepetl (Pico de Orizaba); Geographic Information Systems.

Susceptibilidad a erosión hídrica y procesos gravitacionales en la subcuenca de alta montaña del río Jamapa, Veracruz, México