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Vortex identification based on the Liutex method and its effect on fish passage upstream

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Journal of Hydrodynamics 2024年第1期36卷 130-141页

作者： Chun-ying Shen Rui-guo Yang Xiao-tao Shi Ming-ming Wang Shi-hua He Faculty of Electrical Power Engineering Kunming University of Science and TechnologyKunming650500China Hubei International Science and Technology Cooperation Base of fish passage China Three Gorges UniversityYichang443002China Shanghai Investigation Design and Research Institute Co.LtShanghai200434China

fishway research is important for mitigating the fragmentation of river habitats caused by hydraulic *** vertical slit fishway is a broadly used fishway type because of its high efficiency and adaptability to water ***,the resulting vortex current disrupts the fish passage hence directly affecting fish *** study aims to accurately capture the vortex structure in the fishway and analyze the effect of vortex elements(vortex structure,vortex intensity,etc.)on *** conducted an analysis of the 3-D current flow field in the fishway through the utilization of an experimental model and the large eddy simulation(LES)***,we captured the vortex information in the fishway at different flow rates using the Liutex vortex identification method and investigated the effect of the vortex on fish *** results revealed that the structures inside the fishway pool occupy most of the room,however,the areas with higher vortex strength were primarily located in the vortex near the vertical seam and the mainstream,the vortex strength inside the fishway gradually increases with increasing flow,suppressing fish *** experienced significantly increased resistance when encountering strong *** suggests that the vortex may act as a physical barrier to fish *** findings highlight the potential negative effects of vortex on fish movement and reiterate the importance of understanding vortex dynamics for aquatic environmental *** an effective tool for identifying vortices in fluid flow,the Liutex method demonstrates features of vortex within the fishway,thereby providing important insights into the interaction between fluid dynamics and aquatic organisms.

关键词： Vertical slit fishway vortex identification method Liutex large eddy simulation(LES) fish experiment computational fluid dynamics

Influence of pump noise on the health of fish in a large pumping station

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Journal of Hydrodynamics 2022年第3期34卷 522-531页

作者： Fan Zhang Lu-feng Zhu Xiao-tao Shi Ke Chen Desmond Appiah Shou-qi Yuan Jin-feng Zhang National Research Center of Pumps Jiangsu UniversityZhenjiang212013China Hubei International Science and Technology Cooperation Base of fish passage China Three Gorges UniversityYichang443002China

The axial flow pump,characteristic of a large flow,is widely used in pumping stations of hydraulic ***,the internal noise of the axial-flow pump of a high sound pressure level is notable,with a great influence on the fishing *** present,the studies of the impact of the noise on fish are mainly focused on the explosion,the offshore wind power plant,the ship and other fields,with little attention on the noise generated by the pumping *** paper applies the combination of the computational fluid dynamics and the Actran to study the sound pressure level distribution in the high-noise area inside the axial-flow pump and the noise distribution in the downstream areas of the pumping *** comparisons are made of the hearing threshold and the hearing damage threshold of fish,and it is revealed that the noise inside the axial-flow pump exceeds the hearing damage threshold of fish,which could lead to the hearing damage of over-pumped ***,the noises emitted from the pumping station to the downstream are beyond the fish hearing threshold and will also have a significant impact on the fish around the pumping *** study can provide a reference for studying the impact of the noise generated by various large-scale water transfer projects on fish.

关键词： fish numerical analysis axial flow pump ACTRAN hearing impairment

Evaluation of cone fishways to facilitate passage of small-bodied fish

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Aquaculture and fisheries 2021年第2期6卷 125-134页

作者： Ivor G.Stuart Timothy J.Marsden Arthur Rylah Institute for Environmental Research Department of EnvironmentLandWater and Planning123 Brown StreetHeidelbergVictoria 3084Australia australasian fish passage services 6 Spinifex StreetFern BayNew South Wales 2295Australia

fishways are being provided more regularly than ever before and new designs are needed to provide passage for whole fish *** recent progress,fishways have frequently performed poorly,especially for small-bodied fish(i.e.10-100 mm long),which can form large aggregations below stream *** was the genesis for the development of the cone fishway design,a new style of technical fishway which consists of a series of pre-fabricated cone-shaped concrete baffles installed laterally within a concrete *** cone design arose from the need to install rock ramp fishways at remote sites where rock was unavailable and where maintenance would be *** objective of the present study was to evaluate the suitability of the new cone fishway design to provide passage for small-bodied diadromous species(i.e.fishways were evaluated at three low head(e.g.fish were *** was passage of a broad range of the target size-classes of small-bodied fish and individuals as small as nine mm could ***,further work is needed to quantify the proportion of the small-bodied fish population in the river downstream which find and pass through the cone *** most suitable experimental application of the cone fishway is at sites where there is:(i)a narrow(e.g.passage of small-bodied fish is a major ecological *** fishways provide a useful and novel option to improve passage of small-bodied fish,at appropriate sites,and contribute to a contemporary vision of restoration of whole fish communities.

关键词： fishway fish migration fish communities Australia tidal barrier Fitzroy River Norman River Maribyrnong River

Preliminary age-based life history characteristics of the dogtooth tuna,Gymnosarda unicolor(Ruppell,1838),in the southwest Pacific Ocean

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Aquaculture and fisheries 2023年第3期8卷 323-331页

作者： David J.Welch Adam K.Smith Kyne Krusic-Golub Sandra Erdmann Stephen J.Newman C_(2)O fisheries PO Box 3041CairnsQueensland4870Australia Centre for Sustainable Tropical fisheries and Aquaculture College of Science and EngineeringJames Cook UniversityTownsville4811Australia Reef Ecologic TownsvilleQueensland4811Australia fish Ageing services Pty.Ltd. QueenscliffVictoria3225Australia Western Australian fisheries and Marine Research Laboratories Department of Primary Industries and Regional DevelopmentGovernment of Western AustraliaNorth BeachWestern Australia6020Australia

Dogtooth tuna,Gymnosarda unicolor were sampled off the east coast of Australia(southwest Pacific Ocean)from 2007 to *** were determined by examining thin transverse sections of their sagittal otoliths and were based on counts of alternating opaque and translucent zones(annual growth increments).Growth was rapid during the first year of life,after which growth in length was much *** of the constrained von Bertalanffy growth function(fork length-at-age)were L∞=1164.77(mm,FL)and K=0.44 year^(-1).Preliminary estimates of longevity indicate a maximum observed age of at least 20 *** was a high degree of variation in the observed length and age of sexual maturity for *** this variation,the size at 50%maturity for female *** estimated in this study was 713 mm FL(fish *** life history characteristics of *** overall,indicate that this species may be somewhat resilient to ***,reports of localised depletions,in association with heavy targeting by sports fishers,low effective population sizes and patchy recruitment indicate that this species is particularly vulnerable to overfishing.

关键词： Otoliths Age Life history Pacific ocean Diet fisheries management

Achieving fish passage outcomes at irrigation infrastructure;a case study from the Lower Mekong Basin

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Aquaculture and fisheries 2021年第2期6卷 113-124页

作者： Lee J.Baumgartner Chris Barlow Martin Mallen-Cooper Craig Boys Tim Marsden Garry Thorncraft Oudom Phonekhampheng Douangkham Singhanouvong William Rice Michael Roy Lin Crase Bethany Cooper Institute for Land Water and SocietyCharles Sturt UniversityElizabeth Mitchell DriveAlburyNew South WalesAustralia Department of Primary Industries Port Stephens Fisheries CentrePrivate Bag 1Nelson BayNew South Wales2315Australia australasian fish passage services 27 Beachside PlaceShoal PointQLD4750Australia National University of Laos PO Box 10864Dongdok CampusVientianeLao Democratic People’s Republic Living Aquatic Resources Research Centre Phonsavang VillageSikhotabong DistrictVientianeLao Democratic People’s Republic United States Department of the Interior International Technical Assistance Program1849 C StreetNWWashington DC20240United States University of South Australia School of CommerceCity West CampusAdelaideSouth AustraliaAustralia

Irrigation infrastructure expansion threatens the diversity of freshwater fish *** infrastructure creates migration barriers which can block access to important nursery,feeding and spawning *** PDR is a landlocked country situated within the Lower Mekong River Basin where there is a substantial dependency on rice and fish for food,income and *** country is experiencing an unprecedented boom in irrigation infrastructure investment,with modernisation programs being implemented in every *** significant investment in infrastructure upgrades,and the potential impact on freshwater fish,little consideration has been given to fish passage *** 2008,we commenced a fish passage program in Lao *** intent of this case study is to outline the pivotal elements of the program of knowledge development and transfer,in the context of river connectivity and fisheries management in Lao *** also highlight challenges in international research in development and lessons learned.

关键词： fish passage Tropical rivers Lower mekong basin Migration fishway Lao PDR

Implications of Declining Ground Water and Water Quality in the Greater Okefenokee Swamp Basin for Survival and Recovery of Federally Endangered and Threatened Marine and Aquatic Species and Critical Habitat in the US Southeastern Coastal Plain Ecoregion—Part 2

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Journal of Geoscience and Environment Protection 2023年第4期11卷 86-156页

作者： Sydney T. Bacchus Applied Environmental services Athens Georgia USA

The Floridan aquifer system underlies the United States (US) Southeastern Coastal Plain Physiographic Region. Anthropogenic groundwater declines in that regional karst aquifer system, via semi-confining zones, have been documented in published literature for decades. These anthropogenic groundwater declines reduce surfacewater levels and flows, which increases saltwater intrusion and alters the physical, chemical, and biological integrity of the nation’s waters, in violation of the US Clean Water Act (CWA) of 1972. Historic groundwater declines from mining and other anthropogenic groundwater withdrawals from this regional karst aquifer system already threaten the survival and recovery of marine and aquatic federally endangered and threatened species, as well as existing and proposed critical habitat for those species within the Southeastern Coastal Plain Ecoregion. Examples of marine and aquatic species and their designated critical habitat adversely affected by groundwater declines in the Greater Okefenokee Swamp Basin of this ecoregion include the federally endangered south Atlantic Distinct Population Segments (DPS) of the Atlantic sturgeon (Acipenser oxyrinchus oxyrinchus), shortnose sturgeon (Acipenser brevirostrum), and oval pigtoe mussel (Pleurobema pyriforme), as well as the federally threatened Gulf subspecies of the Atlantic sturgeon (Acipenser oxyrinchus desotoi) and Suwannee moccasinshell (Medionidus walkeri). In 2020, rules were adopted by two federal agencies allowing significant further degradation of the physical, chemical, and biological integrity of the nation’s waters that are essential for maintaining federally listed species and their habitat in this Ecoregion. The US fish and Wildlife Service (USFWS) has acknowledged the harm to these species and critical habitat from mining and additional groundwater alterations, but no comprehensive Areawide Environmental Impact Statement (AEIS), similar to the AEIS required for mining within the Peace River

关键词： Environmental Laws and Regulations Federal Water Pollution Control Act Groundwater Capture Induced Recharge Inter-Basin Flow

Aquatic community structure and stream habitat in a karst agricultural landscape

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Ecological Processes 2022年第1期11卷 155-170页

作者： Neal D.Mundahl Erik D.Mundahl Department of Biology and Southeastern Minnesota Water Resources Center Winona State UniversityWinonaMN 55987USA Mundahl Nordic services Glennallen/McCarthyP.O.Box MXYAlaska 99588USA

Background:Watersheds dominated by agriculture often have significant,negative impacts on local stream habitats and *** study examined stream biota and habitats within an entire stream in a karst agricultural landscape to determine if several decades of watershed conservation and management had reversed the severe degradation caused by poor land use and catastrophic soil erosion during the 1920s and ***:fish communities and stream habitats were degraded at over half of the 22 stream sites examined,and benthic macroinvertebrate communities were mostly poor throughout the entire *** fish communities were associated with missing or narrow riparian buffers,high percent fine sediments,high embeddedness of coarse sub-strates,and homogeneous run *** communities were dominated by filter-feeding taxa and those adapted to life on or within fine *** sites with wide buffers and influenced by groundwater springs had higher fish community integrity and good to excellent instream ***:Our results suggest that wide riparian buffers and karstic springs may have allowed recovery of some stream reaches,but more extensive buffers and additional soil conservation practices in upland areas likely are necessary to protect most stream segments and their biota from on-going agricultural *** state stream buffer laws instituted after this study resulted in establishment of vegetated buffers at all study sites,which may lead to improved stream habitat and biotic communities in future *** invertebrate community improvement also may require translocation of sensitive taxa from nearby watersheds due to limited dispersal abilities of many species currently absent from the study *** frequency and intensity of storm events and flooding may hinder future recovery of stream habitats and biota.

关键词： Agricultural stream fish Macroinvertebrates Stream habitats Karst

A review of potential conservation and fisheries benefits of breaching four dams in the Lower Snake River(Washington,USA)

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Water Biology and Security 2022年第2期1卷 10-22页

作者： Adam J.Storch Howard A.Schaller Charles E.Petrosky Robert L.Vadas Jr. Benjamin J.Clemens Gary Sprague Norman Mercado-Silva Brett Roper Michael J.Parsley Edward Bowles Robert M.Hughes Jay A.Hesse Oregon Department of fish and Wildlife Ocean Salmon and Columbia River Program17330 Southeast Evelyn StreetClackamasOR 97015USA U.S.fish and Wildlife Service 911 Northeast 11th AvenuePortlandOR 97232USA Idaho Department of fish and Game 600 South Walnut StreetBoiseID 83707USA Unaffiliated OlympiaWAUSA Oregon Department of fish and Wildlife Corvallis Research Lab28655 Hwy 34CorvallisOR 97333USA National Marine fisheries Service 650 Capitol MallSacramentoCA 95814USA Centro de Investigacion en Biodiversidad y Conservacion Universidad Autonoma del Estado de MorelosAv.Universidad 1001Col.ChamilpaC.P.62209CuernavacaMorelosMexico National Stream and Aquatic Ecology Center U.S.Forest Service860 North 1200 EastLoganUT 84321USA Independent fisheries Consultant 191 Sooter RoadUnderwoodWA 98651USA Oregon Department of fish and Wildlife 4034 Fairview Industrial Drive SoutheastSalemOR 97302USA Amnis Opes Institute 2895 Southeast Glenn StreetCorvallisOR 97333USA Department of fisheries Wildlife&Conservation Sciences104 Nash HallCorvallisOR 97331USA Nez Perce Tribe Department of fisheries Resources Management 120 Beaver GradeLapwaiID 83540USA

Abundances of important and imperiled fishes of the Snake River Basin continue to *** assessed the rationale for breaching the four lower Snake River Basin dams to prevent complete loss of these fishes,and to maximize their likelihood of *** summarize the science surrounding Sockeye Salmon(Oncorhynchus nerka),Chinook Salmon(***),steelhead(***),Bull Trout(Salvelinus confluentus),White Sturgeon(Acipenser transmontanus),and Pacific Lamprey(Entosphenus tridentatus).From this,we drew ten conclusions:(1)development of the Columbia River System(including the Snake River Basin)has converted mainstem rivers into reservoirs,altering fish behavior and survival;(2)most populations currently record their lowest abundance;(3)the Columbia River System dams reduce productivity of diadromous fishes in the highest-quality spawning grounds that could buffer against future climate dynamics;(4)past actions have done little to reduce impacts or precipitate recovery;(5)the Columbia River System constrains survival and productivity of salmon,steelhead and Bull Trout;(6)Snake River Basin salmon and steelhead remain at high extinction risk;(7)eliminating migration impediments and improving mainstem habitats are essential for maintaining genetic diversity and improving Bull Trout persistence;(8)the lower Snake River Basin dams preclude passage of adult White Sturgeon,constraining gene flow and recruitment;(9)the lower Snake River Basin dams impede dramatically passage of adult and juvenile Pacific Lamprey,and(10)Snake River Basin Pacific Lamprey is at high risk of *** the four lower Snake River Basin dams is an action likely to prevent extirpation and extinction of these *** from the Columbia River System can inform conservation in other impounded rivers.

关键词： Bull trout Impoundment Pacific lamprey Salmon Steelhead White sturgeon

Reimagining large river management using the Resist–Accept–Direct(RAD) framework in the Upper Mississippi River

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Ecological Processes 2023年第4期12卷 3-22页

作者： Nicole K.Ward Abigail J.Lynch Erik A.Beever Joshua Booker Kristen L.Bouska Holly Embke Jeffrey N.Houser John F.Kocik Joshua Kocik David J.Lawrence Mary Grace Lemon Doug Limpinsel Madeline R.Magee Bryan M.Maitland Owen Mc Kenna Andrew Meier John M.Morton Jeffrey D.Muehlbauer Robert Newman Devon C.Oliver Heidi M.Rantala Greg G.Sass Aaron Shultz Laura M.Thompson Jennifer L.Wilkening National Park Service Climate Change Response Program Habitat Conservation Division NOAA Wisconsin Department of Natural Resources Aquatic Sciences Center Center for Limnology U.S. Geological Survey Northern Prairie Wildlife Research Center and Midwest Climate Adaptation Science Center U.S. Army Corps of Engineers Alaska Wildlife Alliance U.S. Geological Survey Alaska Cooperative Fish and Wildlife Research Unit University of Alaska Fairbanks University of North Dakota Great Lakes Indian fish and Wildlife Commission (GLIFWC) Minnesota Department of Natural Resources U.S. Geological Survey National Climate Adaptation Science Center and School of Natural Resources University of Tennessee U.S. Geological Survey National Climate Adaptation Science Center U.S. Geological Survey Northern Rocky Mountain Science Center Department of Ecology Montana State University U.S. fish and Wildlife Service National Wildlife Refuge System U.S. Geological Survey Upper Midwest Environmental Sciences Center U.S. Geological Survey Midwest Climate Adaptation Science Center NOAA NEFSC Orono University of Nebraska-Lincoln

Background Large-river decision-makers are charged with maintaining diverse ecosystem services through unprecedented social-ecological transformations as climate change and other global stressors intensify. The interconnected, dendritic habitats of rivers, which often demarcate jurisdictional boundaries, generate complex management challenges. Here, we explore how the Resist–Accept–Direct(RAD) framework may enhance large-river management by promoting coordinated and deliberate responses to social-ecological trajectories of change. The RAD framework identifies the full decision space of potential management approaches, wherein managers may resist change to maintain historical conditions, accept change toward different conditions, or direct change to a specified future with novel conditions. In the Upper Mississippi River System, managers are facing social-ecological transformations from more frequent and extreme high-water events. We illustrate how RAD-informed basin-, reach-, and site-scale decisions could:(1) provide cross-spatial scale framing;(2) open the entire decision space of potential management approaches; and(3) enhance coordinated inter-jurisdictional management in response to the trajectory of the Upper Mississippi River *** The RAD framework helps identify plausible long-term trajectories in different reaches(or subbasins) of the river and how the associated social-ecological transformations could be managed by altering site-scale conditions. Strategic reach-scale objectives may reprioritize how, where, and when site conditions could be altered to contribute to the basin goal, given the basin's plausible trajectories of change(e.g., by coordinating action across sites to alter habitat connectivity, diversity, and redundancy in the river mosaic).Conclusions When faced with long-term systemic transformations(e.g., > 50 years), the RAD framework helps explicitly consider whether or when the basin vision or goals may no longer be achievable,

关键词： Ecosystem Management Transformation Social-ecological system Anthropocene Climate change Basin planning Cross-scale interactions