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  • 1
    Electronic Resource
    Electronic Resource
    MMO: An improved estimator for log-Pearson type-3 distribution (1994)
    Springer
    Stochastic environmental research and risk assessment 8 (1994), S. 219-231 
    Details
    ISSN: 1436-3259
    Keywords: Parameter estimation ; flood frequency analysis
    Source: Springer Online Journal Archives 1860-2000
    Topics: Architecture, Civil Engineering, Surveying , Energy, Environment Protection, Nuclear Power Engineering , Geography , Geosciences
    Notes: Abstract A mixed method combining the method of moments and the method of optimization (MMO) was developed for estimating the parameters of the log-Pearson type 3 (LP3) distribution. The MMO estimates the parameters of mean and standard deviation by the method of indirect moments (MIM) and estimates the coefficient of skewness by minimizing both the relative root average square error (RRASE) and the relative average bias (RAB). Both the predictive capability and descriptive capability of six popular estimation methods were evaluated using 90 sets of observed flood data and six selected LP3 populations with 1000 samples for each selected sample size. The performance of the MMO was compared with those of five other selected estimation methods. A weighted ranking index (WRI) procedure was developed to help select the best combination of distribution and method for the Louisiana flood data. The WRI takes both the predictive capability and the descriptive capability into account in the evaluation. The combination of LP3/MMO was found to be the best combination for Louisiana flood data.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01587236
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    A dam-breach erosion model: II. Application (1987)
    Springer
    Water resources management 1 (1987), S. 199-221 
    Details
    ISSN: 1573-1650
    Keywords: Breach erosion ; earthfill dam ; BEED model ; peak discharge ; Chezy ; Manning ; sensitivity analysis ; simulated discharge ; South Fork Dam ; Buffalo Creek Dam ; Teton Dam
    Source: Springer Online Journal Archives 1860-2000
    Topics: Architecture, Civil Engineering, Surveying , Geography
    Notes: Abstract In Part I, the earthen dam breach erosion was analyzed. To this end, the BEED (breach erosion of earthfill dams) model was modified and extended. In this paper, Part II of the series, the extended BEED model is applied to three historical cases: South Fork Dam, Buffalo Creek Dam, and Teton Dam. The testing before it can be used for forecast purposes. A sensitivity analysis of the model to its parameters shows that the model is very sensitive to friction factors; Chenzy's for breach erosion, and Manning's for flood routing.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00429943
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    Paper (German National Licenses)
    Fulltext
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