Gratiot Nicolas, Duvert C., Collet L., Vinson D., Nemery Julien, Saenz-Romero C. (2010). Increase in surface runoff in the central mountains of Mexico : lessons from the past and predictive scenario for the next century. Hydrology and Earth System Sciences, 14 (2), p. 291-300. ISSN 1027-5606.
Titre du document
Increase in surface runoff in the central mountains of Mexico : lessons from the past and predictive scenario for the next century
Gratiot Nicolas, Duvert C., Collet L., Vinson D., Nemery Julien, Saenz-Romero C.
Source
Hydrology and Earth System Sciences, 2010,
14 (2), p. 291-300 ISSN 1027-5606
The hydrological response of a medium scale mountainous watershed (Mexico) is analysed over half a century. The hydrograph separation highlights an increasing surface runoff contribution since the early 1970's. This increase is attributed to land use changes while the meteorological forcing (rains) remains statistically stable over the same period. As a consequence, the intensity of annual extreme floods has tripled up over the period of survey, increasing flood risks in the region. The paper ends with a climatic projection over the 21st century. The decrease of precipitation and the increase of temperature should accentuate the trend engaged since the 1970's by reducing groundwater resources and increasing surface-runoff and associated risks.
