Abstract
| Original language | English |
|---|---|
| Pages (from-to) | 1934–1944 |
| Number of pages | 11 |
| Journal | Marine and Freshwater Research |
| Volume | 69 |
| Issue number | 12 |
| DOIs | |
| Publication status | Published - 12 Sep 2018 |
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Physical and hydraulic forces experienced by fish passing through three different low-head hydropower turbines. / Boys, Craig A.; Pflugrath, Brett D.; Mueller, Melanie; Pander, Joachim; Deng, Zhiqun D.; Geist, Juergen.
In: Marine and Freshwater Research, Vol. 69, No. 12, 12.09.2018, p. 1934–1944.Research output: Contribution to journal › Special issue
TY - JOUR
T1 - Physical and hydraulic forces experienced by fish passing through three different low-head hydropower turbines
AU - Boys, Craig A.
AU - Pflugrath, Brett D.
AU - Mueller, Melanie
AU - Pander, Joachim
AU - Deng, Zhiqun D.
AU - Geist, Juergen
PY - 2018/9/12
Y1 - 2018/9/12
N2 - Knowing the kinds of physical stress experienced by fish passing through hydropower turbines can help optimise technologies and improve fish passage. This paper assesses the hydraulic conditions experienced through three different low-head turbines (a very low head (VLH), Archimedes screw and horizontal Kaplan turbine), taken using an autonomous sensor. In total, 127 Sensor Fish deployments were undertaken across all three turbines, generating 82 valid datasets. Decompression was rare at the VLH and screw turbines and rarely fell more than 10 kPa below atmospheric pressure. In contrast, the Kaplan was capable of generating pressures as low as 55.5 kPa (∼45 kPa below atmospheric pressure), over shorter periods of time. More severe ratios of pressure changes could, therefore, be expected for both surface- and depth-acclimated fish at the Kaplan than at the other turbines. Strike was another possible source of fish injury (detected in 69-100% of deployments), and although strike severity was highest at the Kaplan, strike was more likely to be encountered at the screw and VLH than the Kaplan turbine. Shear occurred only near the blades of the Kaplan, and not at severe levels. The results demonstrated that low-head hydropower facilities are not without their risks for downstream migrating fish.
AB - Knowing the kinds of physical stress experienced by fish passing through hydropower turbines can help optimise technologies and improve fish passage. This paper assesses the hydraulic conditions experienced through three different low-head turbines (a very low head (VLH), Archimedes screw and horizontal Kaplan turbine), taken using an autonomous sensor. In total, 127 Sensor Fish deployments were undertaken across all three turbines, generating 82 valid datasets. Decompression was rare at the VLH and screw turbines and rarely fell more than 10 kPa below atmospheric pressure. In contrast, the Kaplan was capable of generating pressures as low as 55.5 kPa (∼45 kPa below atmospheric pressure), over shorter periods of time. More severe ratios of pressure changes could, therefore, be expected for both surface- and depth-acclimated fish at the Kaplan than at the other turbines. Strike was another possible source of fish injury (detected in 69-100% of deployments), and although strike severity was highest at the Kaplan, strike was more likely to be encountered at the screw and VLH than the Kaplan turbine. Shear occurred only near the blades of the Kaplan, and not at severe levels. The results demonstrated that low-head hydropower facilities are not without their risks for downstream migrating fish.
KW - Archimedes screw
KW - fish injury
KW - fish passage
KW - horizontal Kaplan
KW - Sensor Fish
KW - VLH turbine.
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U2 - 10.1071/MF18100
DO - 10.1071/MF18100
M3 - Special issue
AN - SCOPUS:85055540259
VL - 69
SP - 1934
EP - 1944
JO - Australian Journal of Marine and Freshwater Research
JF - Australian Journal of Marine and Freshwater Research
SN - 0067-1940
IS - 12
ER -