Effects of a series of water intake structures on nutrient dynamics in mountainous river system

2016 Fiscal Year Final Research Report

• Project/Area Number: 26701013
• Research Category: Grant-in-Aid for Young Scientists (A)
• Allocation Type: Partial Multi-year Fund
• Research Field: Environmental and ecological symbiosis
• Research Institution: Nagoya University
• Principal Investigator: Tashiro Takashi 名古屋大学, 減災連携研究センター, 准教授 (30391618)
• Research Collaborator: TSUJIMOTO TETSURO 名古屋大学, 工学研究科, 名誉教授 (20115885) ; TODA YUJI 名古屋大学, 工学研究科, 教授 (60301173) ; NOZAKI KENTARO 椙山女学園大学, 教育学部, 准教授 (90350967) ; SKUKA JETMIR Specialist for Hydro-energy and renewables, National Nuclear Agency, Republic of Albania ; KATAOKA TERUYUKI 名古屋大学, 環境学研究科 ; MATSUTANI RYUSUKE 名古屋大学, 環境学研究科
• Project Period (FY): 2014-04-01 – 2017-03-31
• Keywords: 生態系代謝 / 溶存酸素 / 溶存態イオン / 付着藻類 / 魚類群集 / 水域連続性 / 山地渓流 / 流込み式水力発電

Outline of Final Research Achievements

This study was conducted above and below a run-of-river hydropower weirs and plants with particular references to their reducing / releasing waters, in order to clarify the effects of a series of water intake structures on the nutrient dynamics in mountainous river system.
The Odum's concept of stream metabolism was adopted with the dissolved oxygen concentrations and the other water environmental variables such as water levels, temperatures and electric conductivities in combined with simultaneous practical investigations of attached algae, fish community and river water.
According to the results, gross production (P), community respiration (R) and their ratio could be evaluated at each of the conditions. It also could be suggested the cumulative effects of the series of water intake structures with the degeneration of P and R variables in correspondences with the dissolved nutrient concentration, the algal and fish community structures, respectively.

Free Research Field

流域保全学