Comparisons of Weibull- and exponential-based partial duration stochastic flood models
| Autor: | J. F. Cruise, S. T. Ekanayake |
|---|---|
| Rok vydání: | 1993 |
| Předmět: |
Environmental Engineering
Counting process Flood myth Stochastic modelling Mechanical Engineering Ocean Engineering Poisson distribution Exponential function symbols.namesake Modeling and Simulation Statistics symbols Range (statistics) Environmental Chemistry Safety Risk Reliability and Quality Exponentiated Weibull distribution Physics::Atmospheric and Oceanic Physics General Environmental Science Water Science and Technology Weibull distribution Mathematics |
| Zdroj: | Stochastic Hydrology and Hydraulics. 7:283-297 |
| ISSN: | 1436-3259 0931-1955 |
| DOI: | 10.1007/bf01581616 |
| Popis: | A stochastic flood model with a Weibull distribution for flood exceedances is examined and compared to the traditional exponential-based model in terms of predictive and descriptive properties. The model is based upon the traditional representation of the flood mechanism as a Poisson counting process. It is expected that the more flexible Weibull distribution will be capable of modeling flood series which exhibit a wider range of variability than the exponential model. The Weibull-based model is shown to possess predictive properties which are superior to the exponential model when samples exhibit coefficients of variation less than 1.5 and sample sizes are on the order of 2 events per year. These characteristics are shown to exist in many observed flood series in the Gulf Coast of the United States. |
| Databáze: | OpenAIRE |
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