fithydro activities related to downstream fish migration ... · many measures available for...

4th Regional Stakeholder Workshop – Alpine region

11 – 12 September, 2018, Augsburg, Germany

Ismail Albayrak, Laurent David, Robert Boes

Laboratory of Hydraulics, Hydrology and Glaciology VAW, ETH Zurich & CNRS

FIThydro activities related to downstream fish migration

for medium-to-large hydropower plants

10/09/2018 Ismail Albayrak/VAW, ETH Zurich 1

Outline

• Downstream fish migration

– Introduction

– Measures

– Laboratory study

– Field study at HPP Bannwil

• Conclusions

• Outlook



Fish downstream migration: Introduction

Fish migration:

potadromous

30 km < Mid distance migrants < 300 km

potadromous

Short distance migrants < 30km

Adapted from Federal Office for the Environment (FOE), 2018

Fresh water Sea/Ocean water

Anadromous

Catadromous

Long distance migrants > 300 km

dia

dro

mo

us


Fish downstream migration: Introduction

Fish migration:

Adapted from Federal Office for the Environment (FOE), 2018

Fresh water Sea/Ocean water

Photo: Andrew Kennedy, UKPhoto: Dr. William O'Connor


Fish downstream migration: MeasuresConcept Type

Fine Screens

Submerged Bar Screens

Rotary Screens

Eicher-Screen

Wedge-Wire-Screen

Barrier Nets

Skimming Walls

Louvers

Bar-Racks

Plate Screens

Trash Racks

Light (Strobe or Mercury)

Low Frequency Sound

Popper

Electricity

Air- / Water Curtains

Surface Collection Pipes

Traveling Screens

Fish Pumps

Trap and Truck

Alden Turbine

Voith - Minimum Gap Runner

Alstom - Fish Friendly Kaplan-Turbine

Early Warning Systems

Weir Overflow

No Partial Load Operation

Fish Friendly

Operation

Fis

h P

rote

cti

on

Tech

no

log

ies a

t H

PP

Measure

Scre

en

ing

/ S

hie

ldin

g a

nd

Gu

idan

ce

Physical Barriers

By

pa

ss

Mechanical,

Behavioural

Barriers

Sensory,

Behavioural

Barriers

Collection Systems

Co

nveyan

ce Fish Friendly

Turbines

Fish speciesFlow conditionsSite conditionsCost-effectiveness (WP4)

Overview of Downstream passage technologies


Fish downstream migration: Measures

Federal Office for the Environment (FOE), 2018

Louver, Angled bar rack and Modified angled bar rack (MBR), Q> 100 m3/s



Louver

= 15° - 30°

= 90°

sb = 25 - 100 mm

db = 80 - 100 mm

tb = 8 - 10 mm



Louver

Holyoke Canal, ConnecticutPhoto: Albayrak

Louver- and Angled Bar Rack-Systems

Management of a variety of target species

Wide range of hydraulic conditions

Robust and less vulnerable in terms of sediment and driftwood

Considerable size of the system

Applicability at variety of local species unknown (Barbel, grayling, spirlin, trout)

Hydraulic losses and flow field largely unexplored

Hydraulic Etho-hydraulic

Laboratory studies with physical models

2011-2015 (PhD project of Robert Kriewitz)



30 m

1.5m

Qmax= 1200lt = 1.2 m3/s !!!



Modified angled Bar Rack (MBR) with α = 15°, β = 45°

Louver with α = 15°, β = 90°

Kriewitz (2015), Albayrak et al. (2017, 2018)

Head loss reduced:

4 times compared to louver



Kriewitz (2015), Albayrak et al. (2017, 2018)

Barbe (Barbus barbus), Barbel Äsche (Thymallus thymallus), Grayling

Schneider (Alburnoides bipunctatus), Spirlin Bachforelle (Salmo trutta fario) , Trout

Aal (Anguilla anguilla), Eel = 15° = 30°



DOWNSTREAM FISH GUIDING SYSTEMS AT LARGE

CENTRAL-EUROPEAN RIVERS

FIThydro - PhD project by Claudia Beck


Fish downstream migration: Laboratory Study (PhD project of Claudia Beck )

Modified Curved-bar Rack(structural measure)

Head loss further reduced:

4 times compared to MBR

16 times compared to Louver

from September 2018

+ Bypass systems+ Electric field for MCR+ Driftwood and sediment+ Numerical modelling


Fish downstream migration: Case study HPP Bannwil

Spillway fish passage(operational measure)

Modified Curved-bar Rack(structural measure)

Turbine passagemortality study(Barotrauma Detection System measurements,Biopa tool)

3 × KaplanQd = 450 m3/s

3 weirs


Fish downstream migration: Methodology

Hydraulic investigation

ADCP

Fish Monitoring

Radio telemetry & Aris Sonar

Numerical Simulations

3D numerical modelling

US Army Corps of Engineers

BUILDING STRONG®



Velocity measurements using ADCP




CS 23/24, 6m upstream of turbine inlet



3D Numerical Simulation

Dr. David Vetsch & Stephan Kammerer



Turbine passage: Barotrauma Detection System measurements (TUT, SJE, BKW)

Dynamic pressure fluctuations



Turbine passage: Biological Performance Assessment (BioPA) modelling (VOITH, BKW

The BioPA method estimates the probabilities that fish will encounter specific conditions during passage.


Conclusions

Many measures available for downstream fish migration

MCRs with innovative curved bar design present a huge potential for medium-large HPPs

Laboratory and pilot HPP studies to develop a new measure, improve design and/or address questions

Important to study hydraulics and fish movement for cost-effective design of fish passage facility

New solutions, methods, tools and devices (SMTD ) for hydraulic, turbine passage and fish monitoring


Outlook

Operational measure (spill passage)

Velocity measurements during spillway operation

Fish monitoring

3D numerical simulation

Variant study

Turbine passage modelling and BDS measurements

Thank you for your attention!

Questions?

Funded by the Horizon 2020 Framework Programme of the European Union


fithydro activities related to downstream fish migration ... · many measures available for...

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