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Article ; Online: Editorial

Shaowei Zhang / Zhiqun Daniel Deng

Frontiers in Marine Science, Vol

Deep-sea observation equipment and exploration technology

2023 Volume 10

Keywords	hadal zone ; ocean observation ; AUV ; network ; buoy ; Science ; Q ; General. Including nature conservation ; geographical distribution ; QH1-199.5
Language	English
Publishing date	2023-09-01T00:00:00Z
Publisher	Frontiers Media S.A.
Document type	Article ; Online
Database	BASE - Bielefeld Academic Search Engine (life sciences selection)

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Article ; Online: A subdermal tagging technique for juvenile sturgeon using a new self-powered acoustic tag

Stephanie A. Liss / Huidong Li / Zhiqun Daniel Deng

Animal Biotelemetry, Vol 10, Iss 1, Pp 1-

2022 Volume 11

Abstract: Abstract Background A new technology for a self-powered acoustic tag (SPT) was developed for active tracking of juvenile fish, intended to avoid the typical battery life constraints associated with active telemetry technology. We performed a laboratory ... ...

Abstract	Abstract Background A new technology for a self-powered acoustic tag (SPT) was developed for active tracking of juvenile fish, intended to avoid the typical battery life constraints associated with active telemetry technology. We performed a laboratory study to evaluate a subdermal tagging technique for the SPT and effects of the tag on survival, tag retention, and growth in juvenile white sturgeon (Acipenser transmontanus). Results Survival was associated with tag retention. White sturgeon implanted with the SPT (n = 30) had 93% survival and tag retention by day 28, 67% by day 101, and 38% by day 595 post-tagging. Sturgeon implanted with a passive integrated transponder (PIT) tag only (control group) had 96% survival and tag retention by day 28, and through day 101 post-tagging. Fish in the PIT group were repurposed after day 101, so no comparisons with this group were made at day 595 post-tagging. Specific growth rate (SGR) for fork length was a median of 0.25% day−1 by day 28 for the SPT group, which was significantly lower than the PIT group (median: 0.42% day−1; n = 27). The SPT and PIT groups had similar SGR fork length by day 101 post-tagging (0.22 and 0.25% day−1, respectively). SGR weight was also lower for the SPT group compared to the PIT group on day 28 (1.39 and 2.11% day−1, respectively), but the difference again dissipated by day 101 (0.79 and 0.88% day−1, respectively). Conclusion The tagging technique and placement of the SPT allowed the tag to remain upright along the flank of the sturgeon to ensure maximum battery output of the SPT; however, retention rates of the SPT were not ideal. We provided suggestions to improve the tagging technique. Suggestions included tagging fish that are > 400 mm FL, moving the incision location to extend the cavity and create a pocket for the placement of the SPT, and performing a quantitative wound-healing evaluation. Future studies are therefore recommended to evaluate these suggestions.
Keywords	Acoustic telemetry ; JSATS ; Self-powered tag ; Subdermal tagging technique ; White sturgeon ; Ecology ; QH540-549.5 ; Animal biochemistry ; QP501-801
Subject code	380
Language	English
Publishing date	2022-02-01T00:00:00Z
Publisher	BMC
Document type	Article ; Online
Database	BASE - Bielefeld Academic Search Engine (life sciences selection)

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Article ; Online: A large dataset of detection and submeter-accurate 3-D trajectories of juvenile Chinook salmon

Jayson Martinez / Tao Fu / Xinya Li / Hongfei Hou / Jingxian Wang / M. Brad Eppard / Zhiqun Daniel Deng

Scientific Data, Vol 8, Iss 1, Pp 1-

2021 Volume 13

Abstract: Measurement(s) voluntary movement behavior • 3-D trajectory Technology Type(s) acoustic telemetry • Computation Factor Type(s) river • array type Sample Characteristic - Organism Oncorhynchus tshawytscha Sample Characteristic - Environment dam • ... ...

Abstract	Measurement(s) voluntary movement behavior • 3-D trajectory Technology Type(s) acoustic telemetry • Computation Factor Type(s) river • array type Sample Characteristic - Organism Oncorhynchus tshawytscha Sample Characteristic - Environment dam • freshwater biome Sample Characteristic - Location Little Goose Lock and Dam • Snake River • Columbia River • Lower Monumental Lock and Dam • McNary Dam • Bonneville Dam • Ice Harbor Lock and Dam • John Day Dam • Tucannon River Machine-accessible metadata file describing the reported data: https://doi.org/10.6084/m9.figshare.14939169
Keywords	Science ; Q
Language	English
Publishing date	2021-08-01T00:00:00Z
Publisher	Nature Portfolio
Document type	Article ; Online
Database	BASE - Bielefeld Academic Search Engine (life sciences selection)

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Article ; Online: Deep Learning for Automated Detection and Identification of Migrating American Eel Anguilla rostrata from Imaging Sonar Data

Xiaoqin Zang / Tianzhixi Yin / Zhangshuan Hou / Robert P. Mueller / Zhiqun Daniel Deng / Paul T. Jacobson

Remote Sensing, Vol 13, Iss 2671, p

2021 Volume 2671

Abstract: Adult American eels ( Anguilla rostrata ) are vulnerable to hydropower turbine mortality during outmigration from growth habitat in inland waters to the ocean where they spawn. Imaging sonar is a reliable and proven technology for monitoring of fish ... ...

Abstract	Adult American eels ( Anguilla rostrata ) are vulnerable to hydropower turbine mortality during outmigration from growth habitat in inland waters to the ocean where they spawn. Imaging sonar is a reliable and proven technology for monitoring of fish passage and migration; however, there is no efficient automated method for eel detection. We designed a deep learning model for automated detection of adult American eels from sonar data. The method employs convolution neural network (CNN) to distinguish between 14 images of eels and non-eel objects. Prior to image classification with CNN, background subtraction and wavelet denoising were applied to enhance sonar images. The CNN model was first trained and tested on data obtained from a laboratory experiment, which yielded overall accuracies of >98% for image-based classification. Then, the model was trained and tested on field data that were obtained near the Iroquois Dam located on the St. Lawrence River; the accuracy achieved was commensurate with that of human experts.
Keywords	American eel ; imaging sonar ; image classification ; fish identification ; deep learning ; convolutional neural network ; Science ; Q
Subject code	006
Language	English
Publishing date	2021-07-01T00:00:00Z
Publisher	MDPI AG
Document type	Article ; Online
Database	BASE - Bielefeld Academic Search Engine (life sciences selection)

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Article: Design and performance of composite runner blades for ultra low head turbines

Li, Huidong / Daqing Zhou / Jayson J. Martinez / Zhiqun Daniel Deng / Kenneth I. Johnson / Matthew P. Westman

Renewable energy. 2019 Mar., v. 132

2019

Abstract: Stream sites are abundantly available for small, ultra low head, hydropower applications with minimal environmental and ecological impacts compared to large-scale hydropower projects. However, little attention has been paid to these resources because of ... ...

Abstract	Stream sites are abundantly available for small, ultra low head, hydropower applications with minimal environmental and ecological impacts compared to large-scale hydropower projects. However, little attention has been paid to these resources because of the relatively high weight and deployment costs of small turbines compared to the amount of power generated, which results from the use of stainless steel (SS) as the turbine material. Therefore, this study investigated the potential of replacing the machined SS blades in a small propeller-type turbine with light-weight composite blades injection molded from a fiber reinforced polymer. Using computational fluid dynamics models and finite element analysis, a carbon fiber-reinforced thermoplastic was selected from three candidate composite materials for its lower density and smaller blade tip displacement. Injection molded blades using this material were then manufactured and tested in a lab-scale turbine performance test loop to compare with the SS blades of the same design. With the same flow rates, the composite turbine blades generated more power but required a slightly higher head (∼0.08 m) than the SS blades. Both the composite and SS blades displayed similar peak turbine efficiencies, demonstrating the viability of the composite material in replacing SS from the perspective of power-generation performance.
Keywords	blades ; carbon ; composite materials ; environmental impact ; finite element analysis ; fluid mechanics ; power generation ; stainless steel ; thermoplastics ; turbines ; viability ; water power
Language	English
Dates of publication	2019-03
Size	p. 1280-1289.
Publishing place	Elsevier Ltd
Document type	Article
ZDB-ID	2001449-1
ISSN	0960-1481
ISSN	0960-1481
DOI	10.1016/j.renene.2018.08.110
Database	NAL-Catalogue (AGRICOLA)

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Article: Impacts of climate change, policy and Water-Energy-Food nexus on hydropower development

Zhang, Xiao / Claudia Ringler / Hong-Yi Li / L. Ruby Leung / Mohamad I. Hejazi / Yang Gao / Zhiqun Daniel Deng

Elsevier Ltd Renewable energy. 2018 Feb., v. 116

2018

Abstract: Hydropower plays an important role as the global energy system moves towards a less carbon-intensive and sustainable future as promoted under the Sustainable Development Goals (SDGs). This article provides a systematic review of the impacts from policy, ... ...

Abstract	Hydropower plays an important role as the global energy system moves towards a less carbon-intensive and sustainable future as promoted under the Sustainable Development Goals (SDGs). This article provides a systematic review of the impacts from policy, climate change and Water-Energy-Food (W-E-F) nexus on hydropower development at global scale. Asia, Africa and Latin America are hotspots promoting hydropower development with capacity expansion, while Europe and North America focus on performance improvement and environment impacts mitigation. Climate change is projected to improve gross hydropower potential (GHP) at high latitude of North Hemisphere and tropical Africa and decrease that in the US, South Africa and south and central Europe. Analysis from W-E-F nexus highlights the importance of integrated approaches as well as cross-sectoral coordination so as to improve resources use efficiency and achieve sustainable hydropower development. These three factors together shape the future of hydropower and need to be considered for planning and operation purpose.
Keywords	climate change ; energy ; issues and policy ; latitude ; planning ; sustainable development ; systematic review ; water power ; Asia ; Central European region ; Europe ; Latin America ; South Africa ; Southern European region ; United States
Language	English
Dates of publication	2018-02
Size	p. 827-834.
Publishing place	Elsevier Ltd
Document type	Article
ZDB-ID	2001449-1
ISSN	0960-1481
ISSN	0960-1481
DOI	10.1016/j.renene.2017.10.030
Database	NAL-Catalogue (AGRICOLA)

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Article: Characterization of a siphon turbine to accelerate low-head hydropower deployment

Martinez, Jayson J / Alan W. Hansten / Bernardo Beirao / Daqing Zhou / Elena-Maria Klopries / P. Scott Titzler / Robert P. Mueller / Zhiqun Daniel Deng

Journal of cleaner production. 2019 Feb. 10, v. 210

2019

Abstract: Siphon turbines are an attractive type of small-scale hydropower turbines because they can be retrofitted into existing structures where there is already a drop in water elevation. A siphon turbine conveys water from an upper reservoir to a lower ... ...

Abstract	Siphon turbines are an attractive type of small-scale hydropower turbines because they can be retrofitted into existing structures where there is already a drop in water elevation. A siphon turbine conveys water from an upper reservoir to a lower reservoir through the use of a siphon structure that goes over the top of the dam. A small, neutrally buoyant autonomous sensor package known as a Sensor Fish was deployed through a siphon turbine at the Head of the U Hydroelectric Project in Idaho, USA. Comparisons were made between the siphon turbine in this study and other low-head turbines that have been studied using Sensor Fish. The Sensor Fish measurements indicate that this siphon turbine can generate nadir (i.e., minimum) pressures during runner passage of 22.4 kPaA, which is much lower than those of other low-head turbine types that have been studied using Sensor Fish and could be potentially harmful to fish species susceptible to barotrauma injury. Severe acceleration events occurred in the wicket gate and runner regions at rates of 12% and 47% respectively. These numbers are comparable or lower than other low-head turbines that have been studied with Sensor Fish. Due to the low nadir pressures measured, stakeholders should determine the presence of any fish species-of-concern in the area that are susceptible to barotrauma, and if so, methods to avoid or reduce fish entrainment such as screening technologies or diversions should be investigated.
Keywords	dams (hydrology) ; fish ; screening ; stakeholders ; turbines ; water power ; Idaho
Language	English
Dates of publication	2019-0210
Size	p. 35-42.
Publishing place	Elsevier Ltd
Document type	Article
ISSN	0959-6526
DOI	10.1016/j.jclepro.2018.10.345
Database	NAL-Catalogue (AGRICOLA)

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Article: In situ characterization of turbine hydraulic environment to support development of fish-friendly hydropower guidelines in the lower Mekong River region

Martinez, Jayson / Zhiqun Daniel Deng / Chuan Tian / Robert Mueller / Oudom Phonekhampheng / Douangkham Singhanouvong / Garry Thorncraft / Thonglom Phommavong / Khamla Phommachan

Ecological engineering. 2019 Aug., v. 133

2019

Abstract: The Mekong River is one of the most biodiverse rivers on Earth. Many communities located near the river rely on fisheries for sustenance and economics. Along the Mekong River mainstem there are plans for 11 new hydropower projects, with potentially ... ...

Abstract	The Mekong River is one of the most biodiverse rivers on Earth. Many communities located near the river rely on fisheries for sustenance and economics. Along the Mekong River mainstem there are plans for 11 new hydropower projects, with potentially several hundred smaller projects along tributaries. To understand the hydraulic conditions at existing dams in the region, Sensor Fish were deployed at Nam Ngum Dam in Laos. The data collected by Sensor Fish can be used to predict fish injury/mortality if there is a dose-response relationship for the species of interest. The Sensor Fish were released through two units—Unit 1, an older 17.5-MW Francis turbine, and Unit 4, a newer 40-MW Francis turbine. Comparisons were made between the Sensor Fish measurements at Nam Ngum to those from four hydroelectric dams in the U.S. Between the newer and older turbine units tested at Nam Ngum, the newer Unit 4 had a higher median nadir pressure of 126 kPaA compared to 99 kPaA. With respect to both pressure and acceleration, the older Unit 1 had more severe hydraulic conditions. By understanding the physical conditions within existing hydropower projects, and the potential ecological impact those conditions could have on the local fauna, better informed decisions can be made regarding project operations. The results from this study can also be used to guide the engineering design of new hydropower turbines that will improve ecological conditions.
Keywords	dams (hydrology) ; data collection ; dose response ; environmental impact ; fauna ; fish ; fisheries ; guidelines ; mortality ; rivers ; turbines ; water power ; Laos ; Mekong River ; United States
Language	English
Dates of publication	2019-08
Size	p. 88-97.
Publishing place	Elsevier B.V.
Document type	Article
ZDB-ID	1127407-4
ISSN	0925-8574
ISSN	0925-8574
DOI	10.1016/j.ecoleng.2019.04.028
Database	NAL-Catalogue (AGRICOLA)

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Article ; Online: Design Parameters of a Miniaturized Piezoelectric Underwater Acoustic Transmitter

Thomas J. Carlson / Yong Yuan / Zhiqun Daniel Deng / Huidong Li

Sensors, Vol 12, Iss 7, Pp 9098-

2012 Volume 9109

Abstract: PZT ceramics have been widely used in underwater acoustic transducers. However, literature available discussing the design parameters of a miniaturized PZT-based low-duty-cycle transmitter is very limited. This paper discusses some of the design ... ...

Abstract	PZT ceramics have been widely used in underwater acoustic transducers. However, literature available discussing the design parameters of a miniaturized PZT-based low-duty-cycle transmitter is very limited. This paper discusses some of the design parameters—the backing material, driving voltage, PZT material type, power consumption and the transducer length of a miniaturized acoustic fish tag using a PZT tube. Four different types of PZT were evaluated with respect to the source level, energy consumption and bandwidth of the transducer. The effect of the tube length on the source level is discussed. The results demonstrate that ultralow-density closed-cell foam is the best backing material for the PZT tube. The Navy Type VI PZTs provide the best source level with relatively low energy consumption and that a low transducer capacitance is preferred for high efficiency. A 35% reduction in the transducer length results in 2 dB decrease in source level.
Keywords	miniaturized transmitter ; underwater acoustic transmitter ; piezoelectric ceramic ; PZT ; piezoelectric transducer ; transducer power consumption ; fish tag ; Technology (General) ; T1-995 ; Technology ; T ; DOAJ:Technology (General) ; DOAJ:Technology and Engineering ; Analytical chemistry ; QD71-142 ; Chemistry ; QD1-999 ; Science ; Q ; DOAJ:Analytical Chemistry ; DOAJ:Chemistry
Subject code	600 ; 621
Language	English
Publishing date	2012-07-01T00:00:00Z
Publisher	MDPI AG
Document type	Article ; Online
Database	BASE - Bielefeld Academic Search Engine (life sciences selection)

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Article: Assessing hydraulic conditions through Francis turbines using an autonomous sensor device

Fu, Tao / Daqing Zhou / Gary E. Johnson / Hongfei Hou / Joanne P. Duncan / Thomas J. Carlson / Zhiqun Daniel Deng

Renewable energy. 2016 Dec., v. 99

2016

Abstract: Fish can be injured or killed during turbine passage. This paper reports the first in-situ evaluation of hydraulic conditions that fish experienced during passage through Francis turbines using an autonomous sensor device at Arrowrock, Cougar, and ... ...

Abstract	Fish can be injured or killed during turbine passage. This paper reports the first in-situ evaluation of hydraulic conditions that fish experienced during passage through Francis turbines using an autonomous sensor device at Arrowrock, Cougar, and Detroit Dams. Among different turbine passage regions, most of the severe events occurred in the stay vane/wicket gate and the runner regions. In the stay vane/wicket gate region, almost all severe events were collisions. In the runner region, both severe collisions and severe shear events occurred. At Cougar Dam, at least 50% fewer releases experienced severe collisions in the runner region operating at peak efficiency than at the minimum and maximum opening, indicating the wicket gate opening could affect hydraulic conditions in the runner region. A higher percentage of releases experienced severe events in the runner region when passing through the Francis turbines than through an advanced hydropower Kaplan turbine (AHT) at Wanapum Dam. The nadir pressures of the three Francis turbines were more than 50% lower than those of the AHT. The three Francis turbines had much higher magnitudes and rates of pressure change than the AHT. This study provides critical information on hydraulic conditions and fish passage information of Francis turbines, which can help guide future laboratory studies of fish passing through Francis turbine, design fish-friendly turbines, and optimize the operation of existing turbines for better fish passage conditions.
Keywords	fish ; Puma concolor ; turbines ; water power
Language	English
Dates of publication	2016-12
Size	p. 1244-1252.
Publishing place	Elsevier Ltd
Document type	Article
ZDB-ID	2001449-1
ISSN	0960-1481
ISSN	0960-1481
DOI	10.1016/j.renene.2016.08.029
Database	NAL-Catalogue (AGRICOLA)

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