Applicability of the Long and Short Terms Runoff Model in the Eigenji Dam Basin

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  • 長短期流出両用モデルの永源寺ダム流域への適用と考察
  • チョウタンキ リュウシュツ リョウヨウ モデル ノ エイゲンジ ダム リュウイ

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Abstract

In the previous paper, we proposed a model named the long and short terms runoff model, LST-II, for analyzing both flood and long term runoff successively, on the basis of the data observed at a small experimental basin of O.24 km2. This paper examines the applicability of the model in the Eigenji Dam Basin of 132 km2.<BR>There are six telemetering gauge stations for precipitation. Hourly data at three stations are available since 1975, but the data at the residual stations are only for the seasons without snow since 1981. First, therefore, the method for estimating areal precipitation is examined including the supplementing technique for non-gauged data. The estimation method for evapotranspiration is also discussed.<BR>The model parameters are idntified using the SP method for the two years of data. The results of simulation agree well with observed flood and long term runoff hydrographs not only for the identification period but also for the residual period for verification.

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