Journal of ecohydraulics最新文献_第7页

Promoting safe fish passage across barriers: A Special Segment from Fish Passage 2020 促进跨越障碍的安全鱼类通道:《2020年鱼类通道》的特别部分

Journal of ecohydraulics Pub Date : 2020-07-02 DOI: 10.1080/24705357.2020.1842039

引用次数: 0

A good start – but time for new leadership in the editorship of the Journal of Ecohydraulics 这是一个良好的开端，但是《生态水力学杂志》的编辑需要新的领导

Journal of ecohydraulics Pub Date : 2020-07-02 DOI: 10.1080/24705357.2020.1835197

C. Katopodis, P. Kemp

引用次数: 0

Ichthyoplankton drift through fishway in large dam: effect of hydrology, seasonal patterns and larvae condition 大型水坝鱼道浮游鱼漂移:水文、季节和幼虫状况的影响

Journal of ecohydraulics Pub Date : 2020-06-30 DOI: 10.1080/24705357.2020.1762128

Patricia Sarai da Silva, L. F. Celestino, L. de Assumpção, S. Makrakis, J. P. Dias, E. Kashiwaqui, M. Makrakis

{"title":"Ichthyoplankton drift through fishway in large dam: effect of hydrology, seasonal patterns and larvae condition","authors":"Patricia Sarai da Silva, L. F. Celestino, L. de Assumpção, S. Makrakis, J. P. Dias, E. Kashiwaqui, M. Makrakis","doi":"10.1080/24705357.2020.1762128","DOIUrl":"https://doi.org/10.1080/24705357.2020.1762128","url":null,"abstract":"Abstract The seasonal pattern and the composition of downstream drift of fish eggs and larvae through the fish ladder of the Porto Primavera dam, located in the Upper Paraná River, Brazil, were studied. Additionally, the condition of individual larvae with regard to injuries was examined. Samples were collected monthly over three reproductive seasons at upper and lower pools at the twilight (nightfall and dawn). Ichthyoplankton densities were low, especially for eggs, and the downstream passage of fish eggs and larvae through the fish ladder was negatively correlated to water residence time of the reservoir. Highest larvae densities occurred between December and March, with highest densities in February. The ichthyoplankton abundance was similar between sites and times of day, with the predominance of partially damaged larvae (60%). Seventeen taxa were identified, especially non-migratory species. Long-distance migratory species represented less than 1% of the total. Since many migratory species have found favorable habitats for spawning and development in the tributaries of Porto Primavera Reservoir, the dispersion of larvae from these free-flowing tributaries located far from dam through reservoir may not be beneficial for their survival. At the same time, despite the low density and diversity of migratory species larvae drifting downstream from the dam, this fish ladder may have dispersive potential as long as the reservoir displays a shorter water residence time.","PeriodicalId":93201,"journal":{"name":"Journal of ecohydraulics","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2020-06-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"81130725","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 7

Development and evaluation of an empirical equation for the screening effect of bar racks 酒吧架筛分效果经验方程的建立与评价

Journal of ecohydraulics Pub Date : 2020-06-29 DOI: 10.1080/24705357.2020.1770135

Elena-Maria Klopries, A. Wilmink, E. Pummer, Imke Böckmann, A. Hoffmann, H. Schüttrumpf

{"title":"Development and evaluation of an empirical equation for the screening effect of bar racks","authors":"Elena-Maria Klopries, A. Wilmink, E. Pummer, Imke Böckmann, A. Hoffmann, H. Schüttrumpf","doi":"10.1080/24705357.2020.1770135","DOIUrl":"https://doi.org/10.1080/24705357.2020.1770135","url":null,"abstract":"Abstract Passage through hydropower plants can cause severe injuries for downstream migrating fish. Bar racks and bypass systems can help to protect fish from turbine-induced mortality if they are designed correctly following guidelines. Currently, it is not possible to assess how effective bar racks are that do not meet design criteria for fish protection. We introduced the screening effect as a performance parameter for bar racks and developed an equation for determining the screening effect of bar racks for silver eels based on an empirical approach. We compared the equation for eels with the results of behavioural laboratory studies with European eels (Anguilla anguilla), roach (Rutilus rutilus) and Atlantic salmon smolts (Salmo salar). We showed that the equation is not applicable for roach and Atlantic salmon smolts. Using univariate statistics, we identified a significant influence of the bar rack spacing on the screening effect for eels for the guidance system with (Kruskal-Wallis test, p = 0.002) and without a bypass (Kruskal-Wallis test, p = 0.0220) and for salmon without a bypass (Kruskal-Wallis test, p = 0.001) for a significance level of 0.05. The screening effect was significantly different between the fish species tested for a bar rack without bypass and 20 mm bar rack spacing (Kruskal-Wallis test, p = 0.003) and 40 mm (Kruskal-Wallis test, p < 0.001) as well as a bar rack with a bypass and either 40 mm bar rack spacing (Kruskal-Wallis test, p = 0.014) or 60 mm (Kruskal-Wallis test, p = 0.001). The results can help to perform biological evaluations and plan retrofitting measures of non-optimal bar racks.","PeriodicalId":93201,"journal":{"name":"Journal of ecohydraulics","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2020-06-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"79035673","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 3

Flow and parameter optimization of tapered vane 锥形叶片的流动及参数优化

Journal of ecohydraulics Pub Date : 2020-06-23 DOI: 10.1080/24705357.2020.1771223

Karan Solanki, H. Sharma, N. Joshi

{"title":"Flow and parameter optimization of tapered vane","authors":"Karan Solanki, H. Sharma, N. Joshi","doi":"10.1080/24705357.2020.1771223","DOIUrl":"https://doi.org/10.1080/24705357.2020.1771223","url":null,"abstract":"Abstract Submerged vanes are the hydrofoils which generate the helical currents in the flow due to the difference in pressure between the approaching flow side and the downstream side of vanes and are placed obliquely with the flow, with angles ranging from 10° to 40°. Previous studies have been done on the rectangular shaped submerged vanes but only a few studies have been reported for the submerged vanes with non-rectangular shapes. The present study aims to optimize the parameters of tapered vanes and their effect on flow structure around the vanes through numerical modelling. Numerical modelling for the present study was done in ANSYS-CFX software using the K-ω turbulence closure model to simulate the vortical flow. It was observed that maximum strength of secondary currents was obtained for angle of attack, sweep angle and relative vane height (ratio of vane height to depth of flow) of 17°, 10° and 0.48, respectively. It was also observed that in the proximity of the tapered vane, secondary currents are dominated by vortex-lift while in far-reaches, potential lift prevails. It was observed that transverse velocity was maximum for a sweep angle of 10°. Comparing the optimal rectangular vane (with angle of attack of 30) with the tapered vane (with angle of attack of 17), it was observed that the rectangular vane has a tendency to generate higher transverse velocities and hence may act as a sediment diverter to counter sediment movement while the tapered vane has a tendency to generate vortical structures over a larger distance, hence may act as a sediment managing device.","PeriodicalId":93201,"journal":{"name":"Journal of ecohydraulics","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2020-06-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"74905827","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 4

Adult sea lamprey respond to induced turbulence in a low current system 成年海七鳃鳗对低流系统中诱导湍流的反应

Journal of ecohydraulics Pub Date : 2020-06-19 DOI: 10.1080/24705357.2020.1775504

Daniel P Zielinski, S. Miehls, Gordon C. Burns, Charles C. Coutant

{"title":"Adult sea lamprey respond to induced turbulence in a low current system","authors":"Daniel P Zielinski, S. Miehls, Gordon C. Burns, Charles C. Coutant","doi":"10.1080/24705357.2020.1775504","DOIUrl":"https://doi.org/10.1080/24705357.2020.1775504","url":null,"abstract":"Abstract Manipulation of water velocities and turbulence using pumps, propellers, or jets is a promising alternative to physical water control structures to guide fish towards traps or fishways. Sea lamprey (Petromyzon marinus) are a species of concern in much of their native and invasive ranges, and their improved guidance could benefit management actions for both conservation and control. The flow velocity enhancement system (FVES), an emergent technology that uses a Venturi pump to generate a plume of turbulence, has shown promise guiding downstream migrating fish in slow-moving or static water conditions formed by large reservoirs, but is untested for guidance of upstream swimming fish in low current environments. The FVES had minimal impact on depth averaged velocity profiles, but produced elevated levels of turbulence. Changes in spatial distribution and number of turns suggest sea lamprey detect and are mildly attracted to turbulence induced by the FVES. These results demonstrate the potential of induced turbulence as a guidance mechanism for upstream migrating sea lamprey, but more extensive testing is needed to show the full utility of this approach.","PeriodicalId":93201,"journal":{"name":"Journal of ecohydraulics","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2020-06-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"83174036","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 8

Improving survival: injury and mortality of fish struck by blades with slanted, blunt leading edges 提高生存:伤害和死亡率的鱼与倾斜，钝前缘刀片击中

Journal of ecohydraulics Pub Date : 2020-06-16 DOI: 10.1080/24705357.2020.1768166

S. Amaral, S. Watson, Abraham D. Schneider, Jenna Rackovan, Andrew Baumgartner

{"title":"Improving survival: injury and mortality of fish struck by blades with slanted, blunt leading edges","authors":"S. Amaral, S. Watson, Abraham D. Schneider, Jenna Rackovan, Andrew Baumgartner","doi":"10.1080/24705357.2020.1768166","DOIUrl":"https://doi.org/10.1080/24705357.2020.1768166","url":null,"abstract":"Abstract Compact turbines offer potential to reduce hydropower plant construction costs, but conventional turbine blade designs endanger entrained fish due to high blade strike speeds and thin leading edges. We evaluated the potential for combined blade leading edge slant and large leading edge thickness to increase strike survival. Rainbow trout (Oncorhynchus mykiss) were subjected to strikes with 100 mm thick blade analogues. At 10 m/s, strikes at fish length to blade leading edge thickness ratio (L/t) of 2 resulted in 98% survival at a location along the blade witha 30° slant relative to the tangential direction, compared to 26.8% survival at a location with 90°slant. For L/t 1.14-2, survival was found to be sensitive to location of strike within the mid-body region, determined from high-speed video. Strikes of 200 mm fish at 10 m/s resulted in 68% survival when body strike location was 0.58 (near caudal), and 7.9% when body strike location was 0.36 (near head). These results are consistent with previous trends and indicate opportunities to improve turbine blade design for greater entrained fish survival at higher turbine speeds, at both low head (<30 m) and high head projects.","PeriodicalId":93201,"journal":{"name":"Journal of ecohydraulics","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2020-06-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"86978426","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 14

Pacific Lamprey drag force modeling to optimize fishway design 太平洋七鳃鳗拖曳力建模优化鱼道设计

Journal of ecohydraulics Pub Date : 2020-06-16 DOI: 10.1080/24705357.2020.1768911

Hattie Zobott, R. Budwig, C. Caudill, M. Keefer, W. Basham

{"title":"Pacific Lamprey drag force modeling to optimize fishway design","authors":"Hattie Zobott, R. Budwig, C. Caudill, M. Keefer, W. Basham","doi":"10.1080/24705357.2020.1768911","DOIUrl":"https://doi.org/10.1080/24705357.2020.1768911","url":null,"abstract":"Abstract Typically, fish passage design is informed by a critical velocity model whereby fish are assumed to fail passage if the water velocity is higher than the critical swim speed, an assumption that may not be met when locomoting fish are partially submerged. We applied a drag force model (DFM) approach for use in design of Pacific Lamprey (Entosphenus tridentatus) Passage Structures (LPS) where lamprey may be partially or fully submerged. Our investigation assessed the dead-drag forces at four levels of static submergence: fully submerged (120 mm), equally submerged (40 mm), partially submerged (15 mm), and skin-flow (5 mm) for a Pacific Lamprey physical model by varying simulated LPS slope and discharge conditions. We then used the results to establish drag force thresholds corresponding to the known critical velocity thresholds of Pacific Lamprey to predict passage success under partial and full submergence conditions. Consideration of drag force in fish passage could be used to improve or create species-specific design recommendations for fishways, or to inform the design of barriers to prevent invasive species passage. The results suggest consideration of drag force in addition to velocity is beneficial to predict Pacific Lamprey passage success under partial submergence conditions.","PeriodicalId":93201,"journal":{"name":"Journal of ecohydraulics","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2020-06-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"88141226","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 4

A new framework for assessing roughness elements in promoting fish passage at low-head instream structures 一种评估低水头溪流结构促进鱼类通过的粗糙度因素的新框架

Journal of ecohydraulics Pub Date : 2020-05-19 DOI: 10.1080/24705357.2020.1738967

D. Magaju, J. Montgomery, P. Franklin, C. Baker, H. Friedrich

{"title":"A new framework for assessing roughness elements in promoting fish passage at low-head instream structures","authors":"D. Magaju, J. Montgomery, P. Franklin, C. Baker, H. Friedrich","doi":"10.1080/24705357.2020.1738967","DOIUrl":"https://doi.org/10.1080/24705357.2020.1738967","url":null,"abstract":"Abstract Increasing interest in fish passage solutions past low-head instream structures has led to the development and implementation of new designs with various types of roughness elements within these structures. We know that roughness elements increase the heterogeneity in water velocity by creating a continuous or discrete low velocity zone, which supports fish passage. However, the effectiveness of these roughness elements for various low-head structures and fish species differs and is often not assessed in detail. This paper highlights three important aspects of assessing roughness elements, namely fish behavior, flow hydrodynamics and passage efficiency. A novel multi-stage framework that can be used for assessing the effectiveness of fish passage solutions is proposed. Initially, we consider the uniqueness of behaviour between species and the hydrodynamics created by roughness elements, as a generalized solution for the size and arrangement of these elements might not work effectively for all species. Then, for effective performance, the link that is required between fish behaviour (both individual and for groups) and hydrodynamics and effectiveness of the roughness elements is discussed for ensuring effective use in low-head structure designs. The proposed framework synthesizes the information required for effective solutions to fish passage through low-head structures.","PeriodicalId":93201,"journal":{"name":"Journal of ecohydraulics","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2020-05-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"78231897","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 7

A Lagrangian particle-tracking approach to modelling larval drift in rivers 拉格朗日粒子跟踪方法模拟河流中幼虫漂移

Journal of ecohydraulics Pub Date : 2020-05-12 DOI: 10.1080/24705357.2019.1709102

R. McDonald, J. Nelson

{"title":"A Lagrangian particle-tracking approach to modelling larval drift in rivers","authors":"R. McDonald, J. Nelson","doi":"10.1080/24705357.2019.1709102","DOIUrl":"https://doi.org/10.1080/24705357.2019.1709102","url":null,"abstract":"Abstract The migration of larval fish from spawning to rearing habitat in rivers is not well understood. This paper describes a methodology to predict larval drift using a Lagrangian particle-tracking (LPT) model with passive and active behavioural components loosely coupled to a quasi-three-dimensional hydraulic model. In the absence of measured larval drift, a heuristic approach is presented for the larval drift of two species of interest, white sturgeon (Acipenser transmontanus) and burbot (Lota lota), in the Kootenai River, Idaho. Previous studies found that many fish species prefer certain vertical zones within the water column; sturgeon tend to be found near the bottom and burbot close to the water surface. Limiting the vertical movement of larvae is incorporated into the active component of the LPT model. The results illustrate a pattern of drift where secondary flow in meander bends and other zones of flow curvature redistributes particles toward the outside of the bend for surface drifters and toward the inside of the bend for bottom drifters. This pattern periodically reinforces the intersection of drifting larvae with channel margins in meander bends. In the absence of measured larval drift data, the model provides a tool for hypothesis testing and a guide to both field and laboratory experiments to further define the role of active behaviour in drifting larvae.","PeriodicalId":93201,"journal":{"name":"Journal of ecohydraulics","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2020-05-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"91225162","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 11