Latitudinal Analysis of Rainfall Intensity and Mean Annual Precipitation in Chile

dc.creatorPizarro, R.
dc.creatorValdes, R.
dc.creatorGarcia-Chevesich, P.
dc.creatorVallejos, C.
dc.creatorSanguesa, C.
dc.creatorMorales, C.
dc.creatorBalocchi, F.
dc.creatorAbarza, A.
dc.creatorFuentes, R.
dc.date2012-11-28T20:57:54Z
dc.date2012-11-28T20:57:54Z
dc.date2012
dc.date.accessioned2017-03-07T14:59:00Z
dc.date.available2017-03-07T14:59:00Z
dc.identifierCHILEAN JOURNAL OF AGRICULTURAL RESEARCH Volume: 72 Issue: 2 Pages: 252-261
dc.identifier0718-5820
dc.identifierhttp://dspace.utalca.cl/handle/1950/9093
dc.identifier.urihttp://repositorioslatinoamericanos.uchile.cl/handle/2250/375989
dc.descriptionValdes, R (reprint author), Univ Talca, Fac Ciencias Forestales, Casilla 747, Talca, Chile.
dc.descriptionThe study and analysis of precipitation has become a crucial tool in understanding the temporal and spatial behavior of water resources, in terms of availability and impact on extreme events. The objective of this study was to evaluate different rainfall parameters (intensities for 1-h duration D = 1 h and return periods of T = 5 and 100 yr, and mean annual precipitation) for different latitudinal and climatic zones in Chile. We analyzed the information recorded on thousands of pluvial bands and rain gauges for 49 stations; this because it is unclear how rainfall intensities change along the country (though total amounts do), in addition to a lack of literature focused on ranges and amounts on the behavior of rainfall variables. The Gumbel probability distribution function (PDF) and mathematical rainfall intensity formulas were used to develop intensity-duration-frequency (IDF) curves for each station. Maximum and minimum rainfall intensity values for T = 100 yr ranged from 8.79 (hyperarid zone) to 40.17 mm h(-1) (subhumid-humid zone). Total annual rainfall values ranged between 43.9 (hyperarid zone) and 3891.0 mm yr(-1) (humid zone). Additionally, the real maximum intensity registered on each station was analyzed, determining its exceedance probability. Likewise, multiple comparisons were made to detect significant differences between the gauge stations and different climatic zones using the Kruskal Wallis test (alpha = 0.05). Differences between maximum and minimum values registered for all stations were as much as 80 times for total rainfall amounts and 4.5 times for rainfall intensities (T = 100 yr). However, maximum rainfall intensities values were similar at different latitudes, suggesting the absence of correlation between maximum rainfall intensity and annual rainfall amount, as the latter variable increased gradually with latitude.
dc.languageen
dc.publisherINST INVESTIGACIONES AGROPECUARIAS, CENTRO REGIONAL DE INVESTIGACION QUILAMAPU, CASILLA 426, CHILLAN, 00000, CHILE
dc.subjectPrecipitation
dc.subjectfrequency-duration-intensity curves
dc.subjectIDF curves
dc.subjectrainfall intensity
dc.titleLatitudinal Analysis of Rainfall Intensity and Mean Annual Precipitation in Chile
dc.typeArtículos de revistas


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