Author(s): David Dorchies; Mathias Chouet; Francois Grand; Ludovic Cassan; Sylvain Richard; Dominique Courret

Linked Author(s): David Dorchies, ludovic cassan, Dominique Courret

Keywords: Fishway; Open-flow; Pipe-flow; Tools

Abstract: Engineers always need convenient calculation tools on the field or at the office for evaluating hydraulic characteristics and designing solutions while researchers develop scientific software in most cases non-reusable, invisible, and in the worst case, faulty and unreliable. Funded by the French Biodiversity Office, “Cassiopée” software has first been developped for the design and the verification of upstream and downstream fish passage facilities aggregating multiple tools required for dimensioning: - pool-type fishways (with submerged orifices, rectangular and triangular notches and/or vertical slots) and pre-barrages; - baffle fishways (Denil, Fatou, super-active bottom or chevron types); - ramp with evenly distributed protruding blocks; - fish-friendly intakes (inclined or oriented racks and head-losses, flow control device, downstream transfer channel, distance and speed at the point of impact of downstream jet). A module is dedicated to the verification of the crossing criteria of fish passes related to those devices. “Cassiopée” also includes numerous tools for open flow and pipe flow hydraulics for agriculture and environment. Based on different calculation modules, which can be independent or linked in order to carry out complex operations, “Cassiopée” allows an iterative design approach ranging from the definition of the geometric characteristics of the devices to hydraulic simulations of their operating conditions. In a simple and user-friendly interface, it presents the calculation results as clear tables and graphs. It is possible to work on different versions of the same project, and calculation files and results can be saved for later reuse. A general user guide and an illustrated quick start guide allow you to quickly get to grips with the software. Contextual documentation provides detailed information on the different tools and hydraulic formulas used for the calculations. Available in French and English, “Cassiopée” is an open source and free software accessible online (https://cassiopee.g-eau.fr) or as an offline application for Windows, Linux, macOS and Android. An R package is also available for advanced users who need to perform intensive calculations without a graphical user interface. Designed as a practical tool resulting from the transfer of research products, it is intended to be widely used by the hydraulic engineering community as a working and educational tool.

DOI: https://doi.org/10.3850/IAHR-39WC252171192022197

Year: 2022