in preparation

(Summary)

This project launched out from 2020 for 5 years by the acceptance with River Works Technology Research and Development Program of The Ministry of Land, Infrastructure, Transport and Tourism(MITI).  The study is carried out through the collaboration between academic teams consisted of the members of Shizuoka University, The University of Tokyo, Shinshu University, Yamanashi University and Blue Earth Security Co. Ltd. and Numazu Office of River & National Highway.

(Background and Issues)

Discharge channel was constructed in many rivers in Japan to protect the critical impact of flood, however, the ecological impact of the flow control by discharge channel is not well understood yet. This study aims to understand the impact of peak cut on down-stream and estuary ecosystems in Kanogawa-river which runs toward north through the Izu-peninsula where the annual rainfall exceeds 2000mm and it has passed over 50 years since the construction of discharged channel in the middle part of the river.  Another characteristic of Kanogawa-river is ascribable to a huge contribution of groundwater in downstream through e.g., Kakitagawa-river, which amounts one-fourths to the amount of main stream at the inflow point. Based on those features we try to provide scientific understanding the impact of changes in flow regime in Kanogawa-river, which is indeed required for the river management under the changing paradigm of rain fall event.

(Purpose of the study)

in preparation
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