Índice estandarizado de precipitación (SPI) para la caracterización de sequías meteorológicas en la cuenca del río Dagua-Colombia

Estudios Geográficos

Olga Lucia Baquero Montoya²  Yesid Carvajal Escobar²  Wilmar Loaiza Cerón¹ 

[1] Universidad del Valle, Centro Internacional de Agricultura Tropical-CIAT;Universidad del Valle

关键词: Índice estandarizado de precipitación;    fenómeno El Niño;    sequías;    variabilidad climática;    indice de précipitations normalisé;    El Niño;    sécheresse;    la variabilité du climat;   

DOI  :  

学科分类：自然科学（综合）

来源: Estudios Geograficos

【 摘 要 】

The Standardized Precipitation Index (SPI) characterizes meteorological droughts of a place, by quantifying the deficit of rainfall in different time periods. Negative SPI values represents drought, while positive values indicate wet periods. The results suggest that negative SPI periods coincide with El Niño years: 82-83, 91-92 and 97-98. The 91-92 event had the largest impact on the region. These results indicate that the most severe droughts in the basin of Dagua, were presented at the quarters of Dec- Jan-Feb, Jan-Feb-Mar, Jun-Jul-Aug and Jul-Aug-Sep. The results have been obtained with geostatistical techniques, and are a basic input to formulate adaptation strategies and ensure food sovereignty of small farmers against drought.

【 授权许可】

Unknown