Spatial and temporal analysis of rainfall concentration using the Gini index and PCI
Abstract
This study aims to determine if there is variation in precipitation concentrations in Chile. We analyzed daily and monthly records from 89 pluviometric stations in the period 1970-2016 and distributed between 29 degrees 120' S and 39 degrees 30' S. This area was divided into two climatic zones: arid-semiarid and humid-subhumid. For each station, the Gini coefficient or Gini Index (GI), the precipitation concentration index (PCI), and the maximum annual precipitation intensity in a 24-h duration were calculated. These series of annual values were analyzed with the Mann-Kendall test with 5% error. Overall, it was noted that positive trends in the GI are present in both areas, although most were not found to be significant. In the case of PCI, the presence of positive trends is only present in the arid-semiarid zone; in the humid-subhumid zone, negative trends were mostly observed, although none of them were significant. Although no significant changes in all indices are evident, the particular case of the GI in the humid-subhumid zone stands out, where mostly positive trends were found (91.1%), of which 35.6% were significant. This would indicate that precipitation is more likely to be concentrated on a daily scale.
Materias
Precipitation concentrationRainfall Gini Index
Precipitation trends
Trends of monthly and daily precipitation
24 h maximum intensity
Documento no disponible en formato digital. Consultar en biblioteca INFOR: Contacto

Related items
Showing items related by title, author, creator and subject.
-
Latitudinal analysis of rainfall intensity and mean annual precipitation in Chile = Análisis latitudinal ...
Pizarro Tapia, Manuel Roberto; Abarza Martínez, Alejandro; Balocchi Contreras, Francisco; Fuentes, Roberto; García Chevesich, Pablo; Morales Calderón, Carolina; Sangüesa Pool, Claudia B.; Valdés Pineda, Rodrigo; Vallejos Carrera, Carlos (2012)El objetivo de este estudio fue evaluar diferentes parámetros pluviométricos (intensidades para 1 h de duración D = 1 h y períodos de retorno de T = 5 y 100 años, y precipitación anual media) ... -
Inland water bodies in Chile can locally increase rainfall intensity
Pizarro Tapia, Manuel Roberto; Balocchi Contreras, Francisco; Bjarne Bro, Per; Domínguez, Francina; Ffolliott, Peter F.; García Chevesich, Pablo; Hossain, Faisal; Morales Calderón, Carolina; Olivares Santelices, Claudio; Valdés Pineda, Rodrigo (2013)El análisis de las observaciones de precipitación de Chile indicó que los yacimientos de agua artificiales podrían estar afectando la intensidad de eventos de precipitación extrema. Se utilizaron ... -
Chapter 4: Forest Management and Water in Chile
García Chevesich, Pablo; Balocchi Contreras, Francisco; González, Luis; Iroumé A., Andrés; Pizarro, Roberto; Sangüesa Pool, Claudia B.; Valdés Pineda, Rodrigo; Vallejos Carrera, Carlos (2017)