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http://dx.doi.org/10.3741/JKWRA.2002.35.3.275

Streamflow Generation by Boostrap Method and Skewness  

Kim, Byung-Sik (Dept. of Civil Engrg., Inha Univ.)
Kim, Hung-Soo (Dept.of Civil Engrg., Sunmoon University)
Seoh, Byung-Ha (Dept. of Civil Engrg., Inha Univ.)
Publication Information
Journal of Korea Water Resources Association / v.35, no.3, 2002 , pp. 275-284 More about this Journal
Abstract
In this study, a method of random resampling of residuals from stochastic models such as the Monte-Carlo model, the lag-one autoregressive model(AR(1)) and the periodic lag-one autoregressive model(PAR(1)), has been adopted to generate a large number of long traces of annual and monthly steamflows. Main advantage of this resampling scheme called the Bootstrap method is that it does not rely on the assumption of population distribution. The Bootstrap is a method for estimating the statistical distribution by resampling the data. When the data are a random sample from a distribution, the Bootstrap method can be implemented (among other ways) by sampling the data randomly with replacement. This procedure has been applied to the Yongdam site to check the performance of Bootstrap method for the streamflow generation. and then the statistics between the historical and generated streamflows have been computed and compared. It has been shown that both the conventional and Bootstrap methods for the generation reproduce fairly well the mean, standard deviation, and serial correlation, but the Bootstrap technique reproduces the skewness better than the conventional ones. Thus, it has been noted that the Bootstrap method might be more appropriate for the preservation of skewness.
Keywords
stochastic model; bootstrap method; skewness; generation;
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Times Cited By KSCI : 2  (Citation Analysis)
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