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Flow frequancy analysis of high and low flows is curry out by using the regional Probability Weighted Moments PWM algorithm. The distributions fitted to the región area: General extreme value GEV, Wakeby, Extreme value type 1 EVl or Gumbel and Weibull two or three parameters distribution. In order to selecte the distribution appropite for each series for test of goodness of fit were carry out, manely, chi square, DMAX goodness of ifit, probability plot criteria and a graphical test base on Montecarlo simulation. The selection of the distribution is made to depend on the performance of the distributions under tests over all test. The distributions selected for annnual máximum flow series is the EVl distribution while the GEV distribution is selected for the annual minimum flow series.

Tipo de documento: Artículo - Article

Palabras clave: Estadística aplicada, Hidrología, Valle de Cauca Colombia, Método de Montecarlo, Estadística aplicada, Hidrología, Valle de Cauca Colombia, Método de Montecarlo





Fuente: http://www.bdigital.unal.edu.co


Introducción



Revista Colombiana de Estadística No.33 y No.34 REGIONAL F L O W ANALYSIS F O R T H E VALLE DEL CAUCA REGIÓN IN COLOMBIA C.
A.
GONZXLEZ, PACHECO.
P .
N AND FEYEN J . ABSTRACT. Flow beqoeicy analyña of high and lowflowsis cirry out by asiag the regional PiobalMlity Weighted Moments (PWM) algoiithm.
The distributions ñtted to the región are: General extreme valué (GEV), Wakeby, Extreme valne type 1 (EVl) oí Gumbei aad Weiboll (two or three patuneters) dútribationa.
In order to teiect the distribution appiopite foi each series foui test of goodnesa of íit were cany ont, manely, chi sqaaie, DMAX goodness of iit, probability plot criteiia and a gzaphicaj test base on montecailo ainolation. The sekction of the distríbntiao is made to depend on the performaate of the distributions nnder tests ovet all test.
The distributions sdected fot annnal máximum flow series is the EVl distribution while the GEV distribution is selected for the annnal mínimumflowseiies. INTRODUCTION General iafonuation Colombia is located on the Equator in the North-west comer of South America, approximately between 4° 15 South latitude amd 12° 20 North latitudt and between 66- 5 0 and 79- 2 West longitude. The Cauca river is the main rirer drainage basin of the study región, which from am economic point of view is the second most iraportant river in the cointry.
It raises in the Andes mountain range of Southern Colombia and flows Northwards into the Atlantic Ocean.
The study región is crossed from South to North bj the Western mountain range, with a meam altitude of 2000 m above msl.
This mountain ramge U 12 C, A.
González, Pacheco.
P.
N and Feyen J. divides the water which drains to the Pacific ocean, and that which drains Eastwaurds to the Cauca river at 950m above mis approximately.
Parallel to that range and to the East of it is the Central mountain range with a mean altitude of 3000m above msl approximately, which sepárate the catcbments of Cauca and Magdalena ...






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