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You are here : eLibrary : IAHR World Congress Proceedings : 36th Congress - The Hague (2015) ALL CONTENT : Extreme events, natural variability and climate change : Rainfall behavior regionalization to provide design values for infraestructure: case of study in a b...
Rainfall behavior regionalization to provide design values for infraestructure: case of study in a binational basin of south america
Author : JULIO MONTENEGRO GAMBINI(1),
ABSTRACT
This research aims to make a Hydrological regionalization in the binational basin of Catamayo-Chira river, one of the most affected
basins in South America due to extreme events. We explored the most of existing information, seeking to estimate hydrological variables
in lacking data sites where existing information is insufficient in quantity or quality; on the other hand, it is very important we have design
values such as rainfall to propose hydraulic infraestructure. This technique allows better exploring in samples and, consequently,
improving the estimates of variables checking the consistency of hydrological series and identifying the lack of observation using daily
rainfall data provided by governmental institutions of PeršČ and Ecuador. With the use of statistical methods, hydrological regions are
analogous to areal classes. In this present study, we applied to Catamayo-Chira river in order to analyses the patterns of variation and
to delimit regions of uniform behavior and making comparisons with the maximum values of rainfall and runoff data using different
methods. Regional homogeneity characteristics were evaluated following the Multidimensional strokes method by Andrews (1972) and
index-flood method, described by Dalrymple (1960). We perform theoretical probability distributions obtaining the most representative
maximum daily rainfall values and to assess several return periods, additionally within each region, the relationship between rainfall and
El Niño phenomenon will be examined. The comparison of results between the maximum rainfall values obtained by frequency analysis
in each of the rain gauges and by regionalization shows that the methodology is reliable and useful with very good correlation between
the Real and the Regionalized values, in order to obtain design values for hydraulic infrastructure. Based on hydrometeorological
analysis have been developed isohyets maps and 3D surfaces to assess the spatial distribution of rainfall regions.
File Size : 819,827 bytes
File Type : Adobe Acrobat Document
Chapter : IAHR World Congress Proceedings
Category : 36th Congress - The Hague (2015) ALL CONTENT
Article : Extreme events, natural variability and climate change
Date Published : 18/08/2015
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