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Utilización del Standardized Precipitation Evapotranspiration Index (SPEI) en el análisis y monitorización de las sequías: características, recomendaciones y comparación con otros indicadores

Other TitlesApplication of the Standardized Precipitation Evapotranspiration Index (SPEI) for drought analysis and monitoring: characteristics, recommendations and comparison with other indices
AuthorsVicente Serrano, Sergio M. ; Beguería, Santiago ; Martín-Hernández, Natalia; Tomás-Burguera, Miquel ; Azorín-Molina, César
Issue Date19-Nov-2014
CitationManaging Water Resources in Arid and Semi-Arid Regions of Latin America and the Caribbean (MWAR LAC). Expert Symposium ‘Coping with Droughts’ (19- 21 November. Santiago, Chile)
AbstractThe complexity of drought quantification and analysis: • Droughts are difficult to pinpoint in time and space given different economic sectors and natural systems affected. • We identify a drought by its effects or impacts on different types of systems (agriculture, water resources, ecology, forestry, economy, etc.), but there is not a physical variable we can measure to quantify droughts. • Long-term drought objective metrics (streamflows, soil moisture, lake levels, etc.) are commonly not available. Moreover, using only objective metrics other relevant variables to determine drought severity (e.g. the atmospheric water demand) are not taken into account. • We use the so-called “DROUGHT INDICES” for drought quantification and analysis. Standardized Precipitation Evapotranspiration Index (SPEI): The SPEI uses the difference between precipitation and ETo. This represents a simple climatic water balance which is calculated at different time scales to obtain the SPEI. With a value for ETo, the difference between the precipitation (P) and PET for the month i is calculated according to: Di = Pi-EToi, The calculated D values are aggregated at different time scales
Appears in Collections:(EEAD) Comunicaciones congresos
(IPE) Comunicaciones congresos
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