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BS EN 18110:2025 Water quality. Assessment of damage to fish passing through pumping stations and hydropower plants. Methods based on live fish passage survival test and blade strike model >
BS EN 18110:2025 Water quality. Assessment of damage to fish passing through pumping stations and hydropower plants. Methods based on live fish passage survival test and blade strike model, 2025
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- European foreword
- Introduction
- 1 Scope
- 2 Normative references
- 3 Terms and definitions
- 4 Drawings of the installations
- 5 Equipment and tools [Go to Page]
- Figure 9 — Example of fish introduction [Go to Page]
- 6 Fish survival test [Go to Page]
- Figure 10 — Flow chart part 1: supply of the fish
- Figure 11 — Flow chart part 2: checking the fish prior to the fish survival test
- Figure 12 — Flow chart part 3: execution of the fish survival test
- Figure 13 — Flow chart part 4: checking the fish after the fish survival test
- Figure 14 — Flow chart part 5: checking for delayed mortality and completion of the fish survival test [Go to Page]
- Table 1 — Standard fish species and size classes for laboratory survival tests [Go to Page]
- Table 2 — Classification in injury categories [Go to Page]
- 7 Computational method to assess fish survival [Go to Page]
- Figure 15 — Pump rotor geometry, streamline, and velocity in the meridional plane [Go to Page]
- Table 3 — Parameters a, b and vcrit [12] [Go to Page]
- Figure 16 — Definition of angle β in the meridional plane of a pump
- Figure 17 — Definition of angle δ in the through-flow area of an axial pump [Go to Page]
- Figure 18 — Thickness d of the leading edge of a blade [Go to Page]
- 8 Scaling of results of fish survival tests [Go to Page]
- Annex A (informative) Fish species
- Table A.1 — Fish species referred to in this document
- Annex B (informative) Causes of damage and mortality to fish passing through pumping stations and hydropower plants
- B.1 Introduction
- B.2 Mechanisms of fish damage
- B.2.1 General
- B.2.2 Mechanical damage
- B.2.2.1 General
- B.2.2.2 Collision with blades or vanes
- B.2.2.3 Entrapment in clearances
- B.2.2.4 Grinding along walls
- B.2.2.5 Entrainment in small passageways
- B.2.2.6 Impingement on screens or grades
- B.2.3 Barotrauma
- B.2.4 Trauma by shear forces
- B.3 Computational Fluid Dynamics
- Annex C (informative) Fish survival assessment for open-water turbines
- C.1 Fish survival tests
- C.2 Computational method
- Figure C.1 — Schematic view of open-water turbine
- C.2.1 Velocity in the meridional plane
- Figure C.2 — Open water turbine: side view in the meridional plane
- C.2.2 Total mortality
- C.3 Avoidance behaviour
- C.3.1 General
- C.3.2 Maximum sprint velocity
- C.3.3 Minimum mortality upon avoidance behaviour
- Annex D (informative) Survival estimates, statistical precision, power, and sample size
- D.1 General
- D.2 Analysis based on released numbers of fish
- D.2.1 Estimation of passage survival
- D.2.2 Probability and variability
- Table D.1 — Standard normal quantiles for often used confidence levels
- D.2.3 A-priori sample size considerations
- D.3 Analysis based on recaptured numbers of fish
- D.3.1 Estimation of passage survival
- D.3.2 Probability and variability
- D.3.2.1 General
- D.3.2.2 Precision-based analysis
- D.3.2.3 Statistical power analysis
- D.3.3 A-priori sample size considerations
- D.3.3.1 General
- D.3.3.2 Precision-based analysis
- Figure D.1 — Precision for = 0,96 and = 0,98 calculated for different relative fractions of recapture and total number of fish
- Figure D.2 — Precision for = 0,9 and = 0,98 calculated for different relative fractions of recapture and total number of fish
- D.3.3.3 Statistical power analysis
- Figure D.3 — Cohen’s effect size and required total number of samples to reach a statistical power of 80% for a range of test fish survival rates , two-tailed Fisher’s Exact Test (2 independent groups), = 0,98 , , power (1-) = 0,8 , probability leve...
- Annex E (normative) Parameters to be described in a fish welfare journal
- E.1 Before transport: water of origin
- E.2 During transport by the fish farmer/fish supplier/transporter
- E.3 During execution of the fish survival test
- Annex F (informative) Legislation on the protection of test animals used for scientific purposes
- Bibliography [Go to Page]