Design of a paired-weir system for experimental manipulation of environmental flows in streams. Issue 1 (2nd January 2023)

• Record Type: Journal Article
• Authors: Rosero-López, D.; Cowen, E. A.; Walter, M. T.; De Bièvre, B.; González-Zeas, D.; Flecker, A.S.; Osorio, R.; Dangles, O.
• Is Part Of: Journal of ecohydraulics. Volume 8:Issue 1(2023)
• Page Start: 81
• Page End: 88
• Publication Date: 2023-01-02
• Subjects: Environmental flows -- experimental -- manipulation -- structure -- in-stream; Environmental hydraulics -- Periodicals; Ecohydrology -- Periodicals; Ecohydrology; Environmental hydraulics; Electronic journals; Periodicals; 577.6
• DOI: 10.1080/24705357.2020.1830002
• Languages: English
• ISSNs: 2470-5357

Abstract

Abstract: Controlled in-stream flow manipulations are challenging but necessary to implement to assess the consequences of real-world flow alterations on aquatic ecosystems. We designed a double v-notch weir system, which was first prototype-tested in a laboratory flume and then in the field. The device diverted instantaneous flows proportionally in a robust way (e.g., 10% of flow in the stream main channel and 90% of flow into the diversion channel). We tested diversions systematically and evaluated how well flows matched our target flow-percentages. This is one of the first ecohydraulic structures designed and tested to experimentally manipulate environmental flows in small upland streams.