Impacto de los eventos de sequía en la región de la cuenca hidrográfica de la laguna Sauce Grande (Provincia de Buenos Aires, Argentina)

Drought impact in the region of the watershed the Sauce Grande lagoon (Buenos Aires province, Argentina) The distribution and intensity of extreme water causes a direct impact on human activities. Dry and wet events in the region of the watershed of the Sauce Grande lagoon during the period 1971 - 2010 are analyzed through the application of Index of Palmer drought severity, 49% of the cases analyzed corresponded to weak, and emerging drought . The most extreme dry events values (-4.31) caused irreparable damage yields, which decreased by 19 % compared to the current average . During the summer months the severe and extreme (12 %) cases were observed. Dry periods had greater influence on livestock far ming in the region, occurring during the years 2008 and 2009, the relationship between this values of the indices and severe extremes in the morphometry of the lagoon and the Sauce Grande estuary were identified.