Cassiopee

Quick summary

Figure 1: 3D fish tracking system (empty of water) installed in the etho-hydraulic flume at VAW of ETH Zurich (source: VAW)

Figure 2: (a) Camera (acA2000-50gmNIR, Basler) with lens (FE185C086HA-1, Fujifilm), (b) waterproof housing for the camera and lens (Autovimation), (c) high performance computer for camera recording and network switch for camera connection (source: VAW).

Figure 3: (a) Stereo view of a camera pair, (b) three detected fish and noise, (c) 2D tracks of three fish (source: VAW).

Figure 5: Top view of 3D tracks of three fish from an etho-hydraulic test of fish guidance structure with horizontal bars (source: VAW).

Date: 1993

Developed by: French agency for biodiversity (AFB)

Type: Tool

Suitable for the following [[::Category:Measures|measures]]:

Introduction

Cassiopée is a computing software for fish pass designers. It allows studying pool-type fishways, baffle fishways and pre-barrage (for futher information on the different type of fishways please see first deliverable of WP2 D2.1).

It was developed by Myriad Software Ltd in 1993, under the scientific direction of Michel Larinier and Jean-Pierre Porcher. It runs on Windows systems and two updates were held in 1996 and 2011.The program only addresses users familiar with designing fish passes. In the process of designing a fish pass, the function of Cassiopée is to compute variables characterizing its operating and to present clear and explicit results.

Application

Cassiopée allows the determination of flow and water level for sizing or verifying correct operation for:

• pool-type fishways (with plunging or streaming flow notches, submerged orifices, single or double vertical slots)
• baffle fishways (with Denil type, Fatou type, super-active type or chevron type baffles)
• pre-barrages (with rectangular weir, triangular weir or semi-triangular weir)

For pool-type fishways, three computing tools allow to determination of the geometry of the basins, given the target flow and drop between pools, water levels in the pools and volumetric dissipated power criteria set by the designer. A fourth tool allows the computation of the size (width and depth) and to altitudinally set the first wall and first basin, given the upstream water level and flow, drop between pools, water levels in the pools and volumetric dissipated power criteria (the altimeter setting of other walls is obtained by substraction from the first wall and the altimeter setting for the basin is based on the drop between pools).

For pre-barrage, it is possible to associate different types of weir (for example, two rectangular weirs with two levels of crest and a semi-triangular weir). The geometry of pre-barrages can be complex and it is possible to provide flows between basins from upstream to downstream but also between the upstream and any basin.

For baffle fishways, after setting the geometry, the software allows to determine level-discharge and flow velocity-discharge relationships. It also allows to compute the number of baffles and the elevations of the first and last baffle and corresponding bottom, from upstream and downstream water levels.

Cassiopée also has 3 computing tools:

• KIVI: tool to simulate the working conditions of a thin weir (Kindsvater and Cater formula) for submerged flow or not (Villemonte coefficient);
• MOODY: tool to compute the discharge or the head loss of a flow in full pipes;
• DEVER: a tool to compute the relationship between upstream water level and discharge transiting at a weir (simple or composed of different spillways with different characteristics).
• Examples of the software application are given in Figure 17 to Figure 20.

Other information

The total costs of the present system is approx. 40’000 USD=35’000 € including camera set-up and recoding software. For current costs of the equipment, we recommend to ask the corresponding supplier listed below. Note that a cheaper camera and lens set-up can significantly reduce the total cost of the system. The MATLAB-based 3D tracking code developed by VAW will be freely available.

Links to the suppliers of equipment:

• Basler camera

• Fujifilm lens

• Camera waterproof enclosure

Software for 3D fish tracking:

• Available on request.

Relevant literature

• BfG (German Federal Institute of Hydrology), 2018. The behaviour of fish in fishways – BfG and BAW’s ethohydraulic tests. Annual report of 2016/2017, pp.43. https://doi.org/10.5675/bfg-jahresbericht_2016/2017.

• Detert, M., Schütz, C., Czerny, R. (2018). Development and test of a 3D fish-tracking videometry system for an experimenal flume. In Proc. River Flow 2018 - Ninth International Conference on Fluvial Hydraulics, E3S Web of Conferences 40: 03018. https://doi.org/10.1051/e3sconf/20184003018