貯留関数パラメータの一般性に関する 気候・地質条件の異なるダム流域における検討

Translated title of the contribution: Study on generalization of parameters in the storage-discharge relation for different geological and climatological dam basins

Kazumasa Fujimura, Yoshihiko Iseri, Shoji Okada, Shinjiro Kanae, Thomas Kjeldsen, Masahiro Murakami

Research output: Contribution to journalArticle

Abstract

The most utilized flood runoff model for engineering applications in Japan is based on the storagedischarge function of the type S=kQp . The parameters p and k vary between flood events, causing difficulty in estimating and forecasting the flood runoff hydrographs accurately. The aim of this study is to identify the parameters in the storage-discharge relationship for floods for the Sameura Dam basin, Sagae Dam basin, Taisetsu Dam basin and the Iwaonai Dam basin, located in different regions in Japan and representing different topographical, geological and climatological conditions. In order to optimize the parameters p and k by maximizing the Nash-Sutcliffe efficiency, 10,000 simulations are carried out for each flood event by changing the values of k and p. The results show that the optimum parameters in the storage-discharge function, the sets of p and k, for floods in each study basin are represented by the pk curve on the log-log graph.
Translated title of the contributionStudy on generalization of parameters in the storage-discharge relation for different geological and climatological dam basins
Original languageOther
Pages (from-to)161-166
JournalAdvances in River Engineering, JSCE
Volume23
Publication statusPublished - 1 Jun 2017

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