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Tesi sul tema "Fishways"

Autore: Grafiati
Pubblicato: 4 giugno 2021
Ultima modifica: 25 luglio 2025

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1

Kamula, R. (Riitta). "Flow over weirs with application to fish passage facilities." Doctoral thesis, University of Oulu, 2001. http://urn.fi/urn:isbn:9514259777.

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Abstract Fishways are hydraulic structures designed to dissipate the energy of flowing water in order to decrease water velocities and increase water depths. The history of fishways is long, the first written remarks date back to the 17th century. Fishway hydraulics, however, have been intensively studied only starting since the 1980's. Fishways have been classified into three main categories according to their hydraulic characteristics: pool-and-weir, vertical slot, and Denil fishways. Fishways are hydraulically complex structures, and thus designing tools for different fishway types ha
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2

Burford, Duncan Drake. "An assessment of culverts of fish passage barriers in a Montana drainage using a multi-tiered approach." Connect to this title online, 2005. http://www.montana.edu/etd/available/burford_0505.html.

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Thesis (M.S.)--Montana State University--Bozeman, 2005.<br>Title from PDF t.p. (viewed on July 4, 2006). Chairperson, Graduate Committee: Tom McMahon. Includes bibliographical references (leaves 46-48).
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3

Wassvik, Elianne. "Attraction channel as entrance to fishways." Licentiate thesis, Luleå : Luleå University of Technology, 2006. http://epubl.ltu.se/1402-1757/2006/29/index.html.

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4

Morrison, Ryan Richard. "Turbulence characteristics of flow in a full-scale spiral corrugated culvert fitted and sloped- and slotted-weir baffles." Online access for everyone, 2006. http://www.dissertations.wsu.edu/Thesis/Fall2006/r_morrison_092706.pdf.

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5

Blank, Matthew David. "Advanced Studies of fish passage through culverts 1-D and 3-D hydraulic modeling of velocity, fish energy expenditure, and a new barrier assessment method /." Thesis, Montana State University, 2008. http://etd.lib.montana.edu/etd/2008/blank/BlankM0508.pdf.

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Fish passage through culverts is an important component of road and stream crossing design. Although no comprehensive inventory of the number of culverts on fishbearing streams in the United States is available, there is an estimated 1.4 million streamroad crossings. The most common physical characteristics that create barriers to fish passage include excessive water velocity, insufficient water depth and large outlet drop heights. Over the past decade, interest in the effect culvert barriers have on aquatic systems has grown; accordingly, various passage assessment techniques have been used t
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6

Nixon, Kyle Marshall. "Sensitivity of 1-D hydraulic models of fish passage in culverts to descriptions of fish swimming performance." Thesis, Montana State University, 2009. http://etd.lib.montana.edu/etd/2009/nixon/NixonK0809.pdf.

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One way culverts become barriers to the upstream movement of fish is by creating excessive velocities exceeding a fish's swimming ability. FishXing, a common tool for indirectly assessing fish passage, uses fish swimming ability information with one-dimensional culvert hydraulics to predict barrier status of culverts. However, since fish swimming ability data is scarce for many fish species, predictions of a culvert's barrier status can be inaccurate and overly conservative, possibly leading to misclassification or uneconomical design. Additional fish swimming ability research is necessary to
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7

Sikora, Gregory J. "An experimental study of flow regimes in pool and weir fishways." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1997. http://www.collectionscanada.ca/obj/s4/f2/dsk3/ftp05/mq22673.pdf.

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8

Lewis, Hylton Varian. "Evaluation of fishway designs for use at the ebb and flow region of rivers in the Eastern Cape, South Africa." Thesis, Rhodes University, 2007. http://hdl.handle.net/10962/d1005123.

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Fishways are devices that are increasingly being used worldwide to assist aquatic biofauna to migrate through man-made barriers such as weirs and large-scale dams that are used for water storage, electricity generation etc. and have a negative impact on both the upstream and downstream movement of aquatic organisms. Fishways are usually low gradient channels with evenly placed chambers which allow such migrating aquatic species minimal stress on their passage over these barriers. Despite the existence of national and regional policies for their provision, their construction has often been inhi
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9

Cleveson, Aron. "Sheet piling for permanent application in solid water hazards for construction of fishways." Thesis, Linköpings universitet, Medie- och Informationsteknik, 2014. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-106950.

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När ett vattendrag regleras genom byggnation av dammar och vattenkraftverk skapas hinder, även så kallade vandringshinder för fiskar och andra vattenlevande organismer. Genom att bygga en fiskväg möjliggörs åter denna vandring. På senare år har det blivit vanligt att anlägga fiskvägar på ett naturligt sätt. Den senast framtagna metoden för att anlägga naturliga fiskvägar är att bygga ett så kallat inlöp. Inlöpet uppförs genom att en del av en damm skiljs av med hjälp av en skiljevägg som ansluts mot befintlig dammkonstruktion. Skiljeväggen kan utföras på flera sätt, ett av dess är genom att dr
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10

Pennock, Casey A. "Fragmentation and fish passage: can fishways mitigate discontinuities in Great Plains fish communities?" Thesis, Kansas State University, 2016. http://hdl.handle.net/2097/34557.

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Master of Science<br>Department of Biology<br>Keith B. Gido<br>Fishways are a common tool for mitigating the effects of habitat fragmentation on fish communities, but their utility in low-gradient, sand-bed rivers of the Great Plains is not well studied. The Lincoln Street Fishway on the Arkansas River became operational in 2015 and was built specifically to pass small-bodied threatened fishes. We used a combination of surveys up-and downstream of the barrier and tagging experiments to test the ability of fishes to move into and through the fishway. Differences in fish community structure up-
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11

Frei, Christopher Michael. "Design of fish passage at bridges and culverts : Hydraulic engineering circular - 26." Online access for everyone, 2006. http://www.dissertations.wsu.edu/Thesis/Fall2006/c_frei_082506.pdf.

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12

Laine, A. (Anne). "Restoring salmonid stocks in boreal rivers:problems of passage at migratory obstructions and land-derived loading in production areas." Doctoral thesis, University of Oulu, 2001. http://urn.fi/urn:isbn:951425953X.

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Abstract In this thesis, I examine two important aspects surrounding salmonid reproductive ecology, namely: (i) the problems with passing obstructions during migratory spawning runs and (ii) how the early life stages in boreal streams are influenced by increased levels of fine-grained particulate matter from drained peatlands. These aspects are not only critical to salmonid reproductive success but have grave implications regarding environmental quality and species conservation. Spawning runs can be re-established by constructing fishways at obstructions but the efficiency of fishways
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13

Solcz, Andrew Anthony. "Assessment of culvert passage of Yellowstone cutthroat trout in a Yellowstone River spawning tributary using a passive integrated transponder system." Thesis, Montana State University, 2007. http://etd.lib.montana.edu/etd/2007/solcz/SolczA1207.pdf.

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14

Lindmark, Elianne M. "Flow design for migrating fish /." Luleå : Division of Fluid Mechanics, Department of Applied Physics and Mechanical Engineering, Luleå University of Technology, 2008. http://epubl.luth.se/1402-1544/2008/55.

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15

Bunt, Christopher M. "Fishways for warmwater species, utilization patterns, attraction efficiency, passage efficiency, and relative physical output." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 2000. http://www.collectionscanada.ca/obj/s4/f2/dsk1/tape2/PQDD_0028/NQ51183.pdf.

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16

Bengtsson, Mikael. "Utvärdering av omlöp vid Finsjö i Emån : Evaluation of natural fishways at Finsjö in the river Emån." Thesis, Karlstad University, Division for Environmental Sciences, 2009. http://urn.kb.se/resolve?urn=urn:nbn:se:kau:diva-4753.

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<p>Syftet med denna uppsats är att undersöka huruvida fiskvägar förbi vattenkraftverket vid Finsjö i Emån fungerar eller inte. För att finna svar på den frågan har två olika metoder använts, dels telemetrisändare för att se om fiskar hittar fram till fiskvägarna (attraktionseffektivitet) och dels PIT-tags för att mäta om fiskarna lyckas passera genom fiskvägarna (passageeffektivitet). Undersökningen fann att det var en högre passageeffektivitet, 89 % vid nedre Finsjö och 100 % vid övre Finsjö, i Emån jämfört med andra liknande studier. Attraktionseffektiviteten var 75 % vid nedre Finsjö och 59
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17

Romão, Filipe Alexandre Silva. "Determinação das velocidades críticas de natação da boga-comum (Pseudochondrostoma polylepis Steindachner, 1865) e do escalo do Norte (Squalius carolitertii Doadrio, 1988)." Master's thesis, Universidade de Évora, 2009. http://hdl.handle.net/10174/21071.

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Neste estudo foi determinada a velocidade crítica de natação (Ucrit) da boga-comum (Pseudochondrostoma polylepis Steindachner, 1865) e do escalo do Norte (Squalius carolitertii Doadrio, 1988). Estes ciprinídeos endémicos da Peninsula Ibérica foram testados num tanque de natação do tipo Brett, utlizando um procedimento padronizado de determinação do Ucrit. Das 80 bogas testadas o Ucrit médio (± D.P.) determinado foi 0.78 ± 0.15 m/s ou 3.74 ± 0.93 CT/s. Para os 72 escalos testados o Ucrit médio (± D.P.) foi 0.54 ± 0.1m/s ou 4.43 ± 0.72 CT/s. Foram encontradas diferenças significativas entre os U
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18

Cardoso, Gabriela Ribeiro. "Monitorização da passagem para peixes do açude-ponte em Coimbra: otimização da metodologia de contagem." Master's thesis, Universidade de Évora, 2014. http://hdl.handle.net/10174/12064.

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A procura de água conduziu à necessidade do represamento do recurso e à construção de barragens e açudes que comprometem a conetividade longitudinal e as movimentações das populações de peixes migradores. Este efeito pode ser mitigado pela construção de Passagens para Peixes (PPP). O presente estudo, realizado no âmbito do Programa de Monitorização da Passagem para Peixes do Açude-Ponte de Coimbra, entre Janeiro e Junho de 2013, pretendeu otimizar a metodologia de contagem visual dos peixes que utilizam o dispositivo e relacionar essa utilização com variáveis abióticas. A utilização da PPP por
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19

Sanagiotto, Daniela Guzzon. "Análise da macroturbulência do escoamento em escadas para peixes por bacias sucessivas." reponame:Biblioteca Digital de Teses e Dissertações da UFRGS, 2007. http://hdl.handle.net/10183/13828.

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Os mecanismos de transposição de peixes (MTP) são estruturas ou sistemas que possibilitam a migração da ictiofauna entre as partes de jusante/montante/jusante de uma barragem. As escadas para peixes representam um dos tipos de MTP mais conhecidos no mundo e apresentam diversas configurações geométricas. A escolha do tipo de escada deve atender às características natatórias dos peixes selecionados para transporem o obstáculo. Para algumas espécies, como o salmão, já se conhecem geometrias adequadas, entretanto, para a maioria das espécies isto não ocorre e muitos projetos têm demonstrado desemp
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20

Bourtal, Badreddine. "Modification de l'écoulement turbulent au sein de passes à poissons à fentes verticales par l'insertion d'obstacles." Thesis, Poitiers, 2012. http://www.theses.fr/2012POIT2259/document.

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L'étude de l'écoulement turbulent au sein des passes à fentes verticales est nécessaire afin d'améliorer ces dispositifs de franchissement contenant des barrières physiques aux mouvements migratoires des poissons. En effet, les études menées sur les passes existantes ont montré leurs limites pour permettre le franchissement des petites espèces de poissons avec des faibles capacités de nage. L'objectif de notre étude est d'adapter l'écoulement turbulent dans la passe aux capacités de nage des poissons. Des mesures de vitesse bidimensionnelle par Vélocimétrie par Imagerie de Particules (PIV) et
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21

Lopez-Johnston, Siena Marie. "Cascades Island Lamprey Passage Structure: Evaluating Passage and Migration Following Structure Modifications." PDXScholar, 2014. https://pdxscholar.library.pdx.edu/open_access_etds/2082.

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Pacific lamprey (Entosphenus tridentatus), an endemic species to the Columbia River Basin, U.S.A, has experienced staggering decreases in returns to spawning territories in recent decades. As lamprey are threatened severely by a lack of passage at mainstem dams, lamprey specific passage structures have been designed and constructed to address the problem. The Cascades Island Lamprey Passage Structure (LPS) at Bonneville Dam is the longest and steepest structure of its type, following the addition of an exit pipe which allows lampreys to travel from the tailrace of the dam to the forebay. The i
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22

Weber, Nicole Suzanne. "Hydraulic evaluation and improvement of the Dunnville Dam fishway." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 2001. http://www.collectionscanada.ca/obj/s4/f2/dsk3/ftp04/MQ56378.pdf.

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23

Rivinoja, Peter. "Migration problems of Atlantic salmon (Salmo salar L.) in flow regulated rivers /." Umeå : Dept. of Aquaculture, Swedish University of Agricultural Sciences, 2005. http://epsilon.slu.se/2005114.pdf.

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24

Kuoljok, Simon Pirak. "Konnektivitetsåtgärder i Emån : En fallstudie vid Högsby vattenkraftverk." Thesis, KTH, Hållbar utveckling, miljövetenskap och teknik, 2021. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-298253.

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Den nationella planen för vattenverksamheter antogs år 2020 och innebär att vattenverksamheter ska förses med moderna miljövillkor för att öka vattenmiljönytta och att bibehålla den effektiva tillgången till vattenkraftsel. Emån som är ett Natura 2000-område är det största vattendraget i sydöstra Sverige och vattendraget är utifrån konnektiviteten klassificerat som måttlig. Högsby vattenkraftverk, som ligger i Emån och ägs av Uniper, ska omprövas utifrån miljövillkor enligt den nationella planen och idag har Högsby vattenkraftverk ingen fastställd minimitappning för
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25

Carpenter, Forrest Michael. "Understanding the Importance of Intermittently Fragmented Stream Habitat for Isolated Westslope Cutthroat Trout (Oncorhynchus clarki lewisi) in the Colville National Forest, Washington." PDXScholar, 2016. http://pdxscholar.library.pdx.edu/open_access_etds/3315.

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Climate change and anthropogenic effects have vastly reduced Westslope Cutthroat Trout (Oncorhynchus clarki lewisi, WCT) habitat throughout their range, including the Colville National Forest in northeastern Washington where this study was conducted. Many native salmonid populations have declined in abundance since the early 1900s due to a variety of climate- and human-driven forces. Westslope Cutthroat Trout are especially sensitive to habitat loss or degradation and to climate change. Together, climate change, habitat degradation, and non-native salmonid invasions are contributing to increas
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26

Martin, Michael A. "The fisheries of the Lower Columbia River, 1792 to 1850, based on EuroAmerican explorer and fur company accounts." PDXScholar, 2006. https://pdxscholar.library.pdx.edu/open_access_etds/2851.

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The role of fish in the Native American economy of the lower Columbia River has never been considered in detail. My study focused on the Columbia River from its mouth to the Cascades and the Willamette River from its confluence with the Columbia to Willamette Falls. For this study I asked: How was salmon used? What other fish were important? Where and how were these fish taken and used? To address these questions, I evaluated historical documents, including explorer's accounts and the administrative records of fur companies dating from the late 1700's through the 1850's. I used fishery data, p
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27

Gustafsson, Stina. "The Macroinvertebrate Community in a Nature-like Fishway with Habitat Compensation Properties." Licentiate thesis, Karlstads universitet, Avdelningen för biologi, 2012. http://urn.kb.se/resolve?urn=urn:nbn:se:kau:diva-15116.

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Nature-like fishways are often constructed to restore connectivity in streams exploited for hydropower. They also have the potential to compensate for important habitats that have been degraded or lost. The aim of this thesis was to improve knowledge of the concept of nature-like fishway design, with special focus on their habitat compensation potential. This was done by comparing a nature-like fishway with four different habitat types, termed the biocanal, to six nearby natural reference creeks. In paper I the macroinvertebrate colonization of the biocanal was studied and the community compos
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Buck, Sine. "Determining the best location for a nature-like fishway in Gavle River, Sweden." Thesis, Högskolan i Gävle, Avdelningen för Industriell utveckling, IT och Samhällsbyggnad, 2013. http://urn.kb.se/resolve?urn=urn:nbn:se:hig:diva-15725.

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The construction of dams and hydro-power stations are some of the most common anthropogenic changes of watercourses and rivers. While being important to humans and society by providing electricity, these obstructions of watercourses can have severe consequences for the aquatic ecosystems. One consequence is that dams often hinder the important movement of migrating fish species between habitats. This can lead to decline and even extinction of important fish populations. To prevent these negative effects, a number of different fish passage systems, including nature-like fishways, have been deve
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29

Martins, Sidney Lazaro. "Sistemas para a transposição de peixes neotropicais potamódromos." Universidade de São Paulo, 2005. http://www.teses.usp.br/teses/disponiveis/3/3147/tde-13092005-084816/.

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Os Sistemas para a Transposição de Peixes Neotropicais são, ainda, temas multidisciplinares polêmicos envolvendo cultura ambiental, engenharia, biologia, ecologia, política e economia. Nesse universo de interesses, o econômico diverge do ambiental, principalmente no escopo dos investimentos corporativos em energia hídrica, nos quais a busca de lucros suplanta o compromisso ambiental, deixando o ônus à sociedade e irrelevando o bem renovável dos peixes nos ecossistemas aquáticos. Há um grande interesse corporativo nacional para mistificar e irrelevar as estruturas para passagens de peixes em ba
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Branco, Paulo José de Lemos. "Improving connectivity for river fish." Doctoral thesis, ISA, 2013. http://hdl.handle.net/10400.5/6447.

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Fisher, Matthew Thomas. "Spatial and Temporal Patterns of Anadromous Fish Passage at Boshers Dam Vertical Slot Fishway on the James River, Richmond, Virginia." Available to VCU users at:, 2007. http://hdl.handle.net/10156/1830.

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Filipi, Josef. "Rekonstrukce jezu v obci Brantice." Master's thesis, Vysoké učení technické v Brně. Fakulta stavební, 2017. http://www.nusl.cz/ntk/nusl-265348.

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Topic of Diploma thesis is „Reconstruction of the weir in the Brantice village.“ The theoretical part of their focus deals with the definition and putting patterns associa-ted with the design-ing reconstruction of the weir. In the practical part were made three proposals reconstructions of the weir, which are mathematically based, graphically pre-sented and discussed.
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Pon, Lucas Benjamin. "The role of fish physiology, behaviour, and water discharge on the attraction and passage of adult sockeye salmon (Oncorhynchus nerka) at the Seton River dam fishway, British Columbia." Thesis, University of British Columbia, 2008. http://hdl.handle.net/2429/726.

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In many rivers, dams have interrupted the connectivity of migration routes for fish. While fishways can provide access between downstream and upstream habitats, it is important that passage can occur with minimal delay, energy expenditure, and physiological stress. The research presented here is based on investigations into fishway attraction and passage for the Gates Creek sockeye salmon (Oncorhynchus nerka, Walbaum) stock at the Seton River dam in British Columbia. The first part of this thesis examined the effect of changes in water discharge from the dam on the relationship between the
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Revilla, Iñigo, and Laia Pons. "Study of a vertical slot fish ladder : Evaluation of flow dynamics through a standardized bypass and the effect of predesigned roughness elements." Thesis, Högskolan i Gävle, Avdelningen för byggnadsteknik, energisystem och miljövetenskap, 2020. http://urn.kb.se/resolve?urn=urn:nbn:se:hig:diva-32576.

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Migrating freshwater fish population has been significantly declined, mostly by the obstruction of their migratory routes by hydropower dams. To diminish such impacts, fish ladders have been developed to facilitate the passage of migrating fish. However, fish ladders are associated with mortality and migratory failure, resulting in an ecological problem which has been a concern for years. The paper contained in the following pages focuses on studying the viability of an innovative modular design for a fish ladder developed by Fiskvägsteknik AB. The design is based in a vertical slot fishway (V
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Tammela, S. (Simo). "Enhancing migration and reproduction of salmonid fishes:method development and research using physical and numerical modelling." Doctoral thesis, Oulun yliopisto, 2013. http://urn.fi/urn:isbn:9789526202174.

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Abstract Dam building for hydropower production, dredging for log floating and drainage of peatlands have massively affected migrating salmonid populations in Finland. Increased sedimentation and changes in hydraulic conditions have destroyed the majority of spawning and rearing habitats in freshwater brooks and dam building has stopped migration upstream at river mouths. This thesis examines the current state of drained forest brooks, possibilities for restoration and methods to assist migration in rivers used for hydropower. Drainage down to the mineral soil has caused massive erosion and se
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36

Calles, Olle. "Re-establishment of connectivity for fish populations in regulated rivers." Doctoral thesis, Karlstad University, Faculty of Social and Life Sciences, 2005. http://urn.kb.se/resolve?urn=urn:nbn:se:kau:diva-1400.

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<p>The hydropower industry has altered connectivity in many rivers during the last century. Many fish species depend on both an intact longitudinal connectivity to be able to migrate between spawning, feeding and winter habitats, and vertical connectivity for development and survival of incubating embryos and larvae in the gravel. The objective of this thesis was to examine problems and remedial measures associated with disrupted longitudinal and vertical connectivity in regulated rivers. The issue of longitudinal connectivity was studied in the River Emån by evaluating the efficiency of two n
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Martins, Sidney Lazaro. "Sistemas para a transposição de peixes." Universidade de São Paulo, 2000. http://www.teses.usp.br/teses/disponiveis/3/3147/tde-25072002-142649/.

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Sistemas para a Transposição de Peixes são implantados para atenuar os efeitos negativos dos barramentos sobre os peixes migradores ou de piracema. No Brasil, como na maioria dos paises subdesenvolvidos, devido a fatores históricos, financeiros, políticos, institucionais e culturais desfavoráveis, há uma defasagem tecnológica quanto aos Sistemas para a Transposição de Peixes, pelo menos secular, com conseqüências imensuráveis ao ambiente e ao universo dos peixes. A importância dos nossos peixes fluviais, onde se destacam os migradores como os de maior interesse comercial e esportivo, é indiscu
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Ducrocq, Thomas. "Etude de l'écoulement à forte pente autour d'un cylindre émergent." Thesis, Toulouse, INPT, 2016. http://www.theses.fr/2016INPT0087/document.

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Les barrages sur les rivières sont des obstacles à la migration piscicole. Les passes à poissons sont des ouvrages permettant aux espèces piscicoles de migrer, autorisant le rétablissement de la continuité écologique des cours d'eau. Le but de ce travail est de mieux comprendre les phénomènes physiques présents dans les passes à poissons naturelles. Ces passes sont des canaux à forte pente, équipé de rangées de plots en quinconce. Pour valider la pertinence de l'utilisation d'un modèle numérique, l'étude s'est limitée à l'écoulement autour d'un cylindre émergent placé au centre d'un canal. Le
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Zahradníková, Lenka. "Protipovodňová ochrana obce Brantice." Master's thesis, Vysoké učení technické v Brně. Fakulta stavební, 2019. http://www.nusl.cz/ntk/nusl-391979.

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The thesis is concerned with the design of a flood protection for the Brantice municipality, a part of which is an adjustment of the Opava river stream bed, specifically kilometer 77,6554 to 78,7020 and, moreover, a design of a reconstruction of the weir at kilometer 78,340. A capacity assessment of the original stream bed in the built-up area and its surroundings is a part of the thesis, as well as a measure to increase the stream capacity and a design of a boulder chute with a water gate, which replaced the original weir. The program HEC-RAS 4.1.0. was used for the stream capacity calculatio
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40

Černý, David. "Návrh opatření na řece Svratce v k.ú. Svratka." Master's thesis, Vysoké učení technické v Brně. Fakulta stavební, 2020. http://www.nusl.cz/ntk/nusl-409713.

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The diploma thesis focuses on the assessment of the current state of the Svratka watercourse and of the capacity of the existing objects on the course, which is partially modified in the solved locality and includes both – intravarian and extravarian areas of the town. Within hydrotechnical calculations, the 1D mathematical model HEC-RAS version 5.0.6 was used to determine the course of levels. The thesis focuses also on suitable design of flood protection measures on the river Svratka with protection for design flow Qn = Q20 = 28,6 m3 / s.
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41

Ballu, Aurélien. "Étude numérique et expérimentale de l'écoulement turbulent au sein des passes à poissons à fentes verticales. Analyse de l'écoulement tridimensionnel et instationnaire." Thesis, Poitiers, 2017. http://www.theses.fr/2017POIT2256/document.

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L'objectif de cette thèse est de caractériser l'influence de la présence d'obstacles dans les passes à poissons à fentes verticales. Deux types d'éléments sont couramment insérés, à l'heure actuelle, dans les passes : les seuils et les macro-rugosités. Dans un premier temps, l'effet de ces deux dispositifs à la fois sur l'écoulement et sur le comportement des poissons est étudié. Dans le but de favoriser le passage des petites espèces à travers le dispositif de franchissement, une solution technique est ensuite proposée, sous la forme de plusieurs rangées de cylindres flexibles placées en sort
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42

Olsson, Peter. "Aspens (Aspius aspius) lekvandring och lekhabitat utnyttjande i Glumman." Thesis, Karlstads universitet, Fakulteten för samhälls- och livsvetenskaper, 2012. http://urn.kb.se/resolve?urn=urn:nbn:se:kau:diva-15082.

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Aspen är en karpartad fiskart och lite är känt om dess ekologi, på rödlistan har den klassen nära hotad (ArtDatabanken 2012). I värmländska Glumman, en ca två mil lång övergödd å belägen väster om Väse, vandrar aspen upp på våren för att leka vid Väse kyrka där den enda kända lekplatsen i ån finns. Tre vandringshinder finns i ån varav det nedersta är beläget ca 500 m från den kända lekplatsen. Syftet med studien var att undersöka om asp som lyftes över det nedersta vandringshindret sökte sig till lekplatser högre upp i systemet och om de där lekte. Totalt radiomärktes tre asphanar varav två ly
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43

Rydholm, Björn. "Omlöp vid småskaliga vattenkraftverk, hållbarhet för både verk och miljö? : Mätning av effektförluster orsakade av omlöpet vid Åby vattenkraftverk i Växjö kommun." Thesis, Linnéuniversitetet, Sjöfartshögskolan (SJÖ), 2017. http://urn.kb.se/resolve?urn=urn:nbn:se:lnu:diva-63792.

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I Sverige finns cirka 2000 vattenkraftverk men endast 10 procent har någon form av omlöp eller annan lösning (Risinger, 2012). Nya, strängare regler håller nu på att införas. Sedan 2014 finns en gemensam strategi från Energimyndigheten och Havs- och vattenmyndigheten för åtgärder i svensk vattenkraft (Risinger, 2014). En godkänd fiskväg är ett av kraven.Särskilt den småskaliga vattenkraften (energitillförsel under 10 MWh enligt Risinger (2012)) drabbas. Deras intäkter står många gånger i proportion till energiproduktionen och därmed saknas ofta de ekonomiska förutsättningarna för en fiskväg. V
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44

Reba, Michele L. "The design and evaluation of three "stream simulation" culverts in south central Oregon /." 2001. http://hdl.handle.net/1957/9921.

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45

Mallen-Cooper, Martin. "Fishways and freshwater fish migration on South-Eastern Australia." 1996. http://hdl.handle.net/2100/548.

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University of Technology, Sydney. Faculty of Science.<br>In the last 100 years there have been dramatic declines in the range and abundance of native freshwater fish in south-eastern Australia. These declines have been attributed to habitat loss and degradation (including river regulation, water quality, erosion/siltation, instream cover and riparian vegetation), alien fish species, overfishing, and the obstruction of fish passage. In south-eastern Australia there are 86 species of freshwater fish and 36 of these have some migratory component of their life history that requires free passage al
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46

Chung, Wei-Tsung, and 鍾偉宗. "Study on Migration of Paramisgurnus dabryanus through Corrugated High-Density Polyethylene Fishways." Thesis, 2015. http://ndltd.ncl.edu.tw/handle/79407017691137033758.

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碩士<br>國立臺灣大學<br>生物環境系統工程學研究所<br>103<br>Paramisgurnus dabryanus also known as the Chinese loach (Lin et al. 1991), is a common fresh water fish that can be found all around Taiwan but little information is known from it. It belongs to the Cobitidae family, can be found habiting paddy fields and is usually mixed and confused with the Misgurnus anguillicadatus. Loaches uses paddy fields to reproduce, nursery ground and obtain food, in other words paddy fields are part of their life cycle. Due to the modern drainage systems, the connection between paddy fields, irrigation ditches and creeks has be
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47

Silva, Ana Margarida Ferreira Teixeira. "Ecohydraulics of pool-type fishways for the Iberian Barbal (Luciobarbus Bocagei Steindachner, 1864)." Doctoral thesis, 2009. http://hdl.handle.net/10400.5/2453.

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Doutoramento em Engenharia Florestal - Instituto Superior de Agronomia<br>This study analyses the impact of different hydraulic conditions on the Iberian barbel’s upstream movements in a pool-type fishway. Developed in an experiment pool-type fishway prototype and including fish of different sizes, this study investigates: i) the efficiency of passage through submerged orifices or notches; ii) the effect of velocity, turbulence and Reynolds shear stress on this species’ behaviour; iii) the suitability of straight and offset orifices to fish’s passage and, finally, iv) the efficiency of of
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48

House, Matthew R. "Countersunk culvert hydraulics for upstream juvenile fish passage /." 2001. http://hdl.handle.net/1957/7892.

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49

張世倉. "Environmental Impact Assessment of Check Dams with Evaluation of the Function of Fishways in the Wushykeng Creek, Taichung County." Thesis, 1998. http://ndltd.ncl.edu.tw/handle/24876784807112332710.

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碩士<br>國立海洋大學<br>漁業科學研究所<br>86<br>Wushykeng Creek is a 12-kilometer long mountain stream, a tributary to the Daan River, situated in the Taichung county in the central portion of Taiwan. In 1987-1989 the Taiwan Forestry Bureau constructed seven check-dams (sabo-dams) for the stream bed stabi ization, with nine fishways. From July 1995 to May 1997, the stream survey was conducted at eight stations to collect data on physical environment (stream flow, stream width, water depth, water velocity, bottom substrate, and shore line conditions), water quality (water temperature, dissolved oxygen content
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50

(2930712), Ivor G. Stuart. "Assessment of a vertical-slot fishway for non-salmonid fish at a tidal barrier on the sub-tropical Fitzroy River, Queensland." Thesis, 1999. https://figshare.com/articles/thesis/Assessment_of_a_vertical-slot_fishway_for_non-salmonid_fish_at_a_tidal_barrier_on_the_sub-tropical_Fitzroy_River_Queensland/20459520.

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<p> Fishways designed for salmonids in temperate rivers have often been successful, but similar fishways provided for non-salmonid species in tropical and sub- tropical rivers have frequently failed. In 1970 a salmonid style fishway was built on a tidal barrage on the sub -tropical Fitzroy River, in Queensland, north-eastern Australia. Despite modifications to the design in 1987 assessment of the fishway in 1978 and 1992 demonstrated that it was ineffective; particularly as few barramundi (Lates calcarifer [Centropomidae]) were found at the top of the fishway. The inadequacy of the design appe
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