Hydrological Research Letters
Online ISSN : 1882-3416
ISSN-L : 1882-3416
Estimating watershed-scale storage changes from hourly discharge data in mountainous humid watersheds: toward a new way of dominant process modeling
Syuhei KobayashiYoshiyuki Yokoo
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2013 Volume 7 Issue 4 Pages 97-103

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Abstract

The present study demonstrates and suggests a methodology for estimating watershed-scale storage changes from hourly discharge data in mountainous watersheds under a humid climate in Japan as the basis for watershed characterizations by combining a hydrograph separation and a storage-discharge formulizing method. Firstly, we separated hydrographs into different sub-components with respect to the time constants of the flow recession periods of the hydrograph by the filter-separation autoregressive method. Then we applied a storage-discharge formulizing method to the relationship between watershed-scale storage and discharge sub-components independently. As the result, we obtained a realistic estimate of annual watershed-scale storage change in the upper Abukuma River watershed. In addition, we compared our methodology with the non-linear reservoir modeling approach to explore the potential for extensive applications such as dominant process modeling, watershed classifications, and practical watershed management.

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© 2013 Japan Society of Hydrology and Water Resources
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