Influence of concrete lining to aquatic ecosystem in an agricultural drainage channel

2014 Fiscal Year Final Research Report

• Project/Area Number: 22380128
• Research Category: Grant-in-Aid for Scientific Research (B)
• Allocation Type: Single-year Grants
• Section: 一般
• Research Field: Irrigation, drainage and rural engineering/Rural planning
• Research Institution: Gifu University
• Principal Investigator: HIRAMATSU Ken 岐阜大学, 応用生物科学部, 教授 (90271014)
• Co-Investigator(Kenkyū-buntansha): NISHIMURA Shinichi 岐阜大学, 応用生物科学部, 教授 (90228221) ; TSUCHIDA Koji 岐阜大学, 応用生物科学部, 教授 (00252122) ; IWASAWA Atsushi 岐阜大学, 応用生物科学部, 教授 (90242742) ; ICHION Eiji 石川県立大学, 生物資源環境学部, 准教授 (10320912) ; YONEBAYASHI Koyo 石川県立大学, 生物資源環境学部, 名誉教授 (00046492) ; ONISHI Takeo 岐阜大学, 応用生物科学部, 准教授 (70391638)
• Research Collaborator: LOUCKS Daniel P. Cornell University, Department of Civil and Environmental Engineering, Professor Emeritus
• Project Period (FY): 2010-04-01 – 2015-03-31
• Keywords: 農業用排水路 / 生態系 / 魚種相 / 食物網 / 生活排水 / 脱窒 / 生態系配慮工法 / 改修工事

Outline of Final Research Achievements

Aquatic biota in the agricultural drainage channel continues to fluctuate for almost a decade after the improvement work with concrete-lining, where not loss of the biomass, but the change of the constituent species is seen. Installed eco-friendly works show certain effectiveness to maintain the fish ecosystem and the fluctuation of each species mainly depends on its spawning style. Remarkable self-purification of water due to denitrification and some mechanism is confirmed. Thus, conservation of the ecosystems and purification of the water can be considered as a part of the function of drainage channels. Finally, a scenario based model that is built by the acquired knowledge shows the ecosystem in the channel might be very vulnerable even to the slight change in its environment.

Free Research Field

水資源環境学