River Research and Applications最新文献_第4页

Passage through a fishway entrance at different velocities—results from flume experiments with small non‐salmonids 以不同速度通过鱼道入口--小型非鲑鱼水槽实验结果

IF 2.2 4区环境科学与生态学

River Research and Applications Pub Date : 2024-05-27 DOI: 10.1002/rra.4299

Cornelia Schütz, Rebekka Czerny, Marcus Herbst, Martin Henning, Matthias Pitsch

{"title":"Passage through a fishway entrance at different velocities—results from flume experiments with small non‐salmonids","authors":"Cornelia Schütz, Rebekka Czerny, Marcus Herbst, Martin Henning, Matthias Pitsch","doi":"10.1002/rra.4299","DOIUrl":"https://doi.org/10.1002/rra.4299","url":null,"abstract":"A challenge in the design of fishways especially for large rivers is the trade‐off between attraction and passability of the entrance. High flow velocities in the entrance slot generate a strong attraction flow and tend to have better attraction efficiency for upstream migration. However, these velocities may also prevent small‐bodied species or juvenile fish from entering the fishway. With our experiment, we reproduced fish swimming behaviour and passage of a fishway entrance for small‐bodied fish under realistic hydraulic conditions. At an entrance slot with 0.4 m width four velocities 0.8, 1.2, 1.5 and 1.8 ms−1 were investigated. In total, 326 juvenile roach (Rutilus rutilus (Linnaeus, 1758)), gudgeons (Gobio gobio (Linnaeus, 1758)) and spirlins (Alburnoides bipunctatus (Bloch, 1782)) were tested. The passage rates of the three tested species were altogether higher than would have been predicted from reported swimming capacities. They increased from gudgeons to roach and (significantly) to spirlins and we could show how passage rates of the three species decreased with increasing flow velocities, suggesting species‐specific critical slot velocities. Still, these velocities are lower than those currently proposed to generate sufficient attraction flow, which may have implications for fishway design.","PeriodicalId":21513,"journal":{"name":"River Research and Applications","volume":"82 1","pages":""},"PeriodicalIF":2.2,"publicationDate":"2024-05-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141166533","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Managing water gate operation and fish passage facilities in irrigated systems of the Nam Kam River, Thailand 泰国南锦河灌溉系统的水闸运行和鱼道设施管理

IF 2.2 4区环境科学与生态学

River Research and Applications Pub Date : 2024-05-11 DOI: 10.1002/rra.4303

Apiradee Hanpongkittikul, Ian G. Cowx, Siranee Ngoichansri, Renu Sirimongkonthaworn, Boonsong Sricharoendham, Tiwarat Thalerngkietleela, Paweena Phiwkham, Naruepon Sukumasavin, Wongpathom Kamonrat, Sornchai Kensom, Yongyote Reekanong, Nakhorn Pila

{"title":"Managing water gate operation and fish passage facilities in irrigated systems of the Nam Kam River, Thailand","authors":"Apiradee Hanpongkittikul, Ian G. Cowx, Siranee Ngoichansri, Renu Sirimongkonthaworn, Boonsong Sricharoendham, Tiwarat Thalerngkietleela, Paweena Phiwkham, Naruepon Sukumasavin, Wongpathom Kamonrat, Sornchai Kensom, Yongyote Reekanong, Nakhorn Pila","doi":"10.1002/rra.4303","DOIUrl":"https://doi.org/10.1002/rra.4303","url":null,"abstract":"The migration of fishes through the Thoranit Naruemit water gate on the Nam Kam River, a tributary of the Mekong River in Thailand, was studied to understand the hydrological factors and improve the operational regime of the fish pass at the structure. Migration of fish from the Mekong River started in May, at the onset of the rainy season. During 60 days of operation, the fish pass supported the upstream migration of 83 species and ~440,000 fish, equivalent to about 11 tonnes of fish. The fish pass supported migration of a range of fish sizes between 45 and 700 mm, and most fish were larger than the size of first maturity for the species in question. The factors influencing migration into the Nam Kam included the lunar cycle, flow in the fish pass, water level in the river and flow variability. Migration tended to increase in the 3–4‐day period before or after a full moon. Discharge and water level changes associated with rising water levels in the Mekong River synchronize with the spawning season of most Mekong fish and trigger upstream migration. Many fish migrated through the pass at discharges through sluice gates between 8 and 323 m3/s and with a flow through the fish pass between 0.95 and 3.08 m/s. Restrictions to fish migration were found and recommendations for water gate and fish pass operation are provided.","PeriodicalId":21513,"journal":{"name":"River Research and Applications","volume":"39 1","pages":""},"PeriodicalIF":2.2,"publicationDate":"2024-05-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140941233","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Patterns of riparian forest disturbance caused by tree dislodging on a subtropical river during large floods 大洪水期间亚热带河流上树木移位对河岸森林造成的干扰模式

IF 2.2 4区环境科学与生态学

River Research and Applications Pub Date : 2024-05-10 DOI: 10.1002/rra.4298

Richard Sharpe, Andrew Brooks, Jon Olley, Justine Kemp

{"title":"Patterns of riparian forest disturbance caused by tree dislodging on a subtropical river during large floods","authors":"Richard Sharpe, Andrew Brooks, Jon Olley, Justine Kemp","doi":"10.1002/rra.4298","DOIUrl":"https://doi.org/10.1002/rra.4298","url":null,"abstract":"Riparian forests contribute to the resilience and biocomplexity of floodplains but may be catastrophically impacted by large floods. Forest disturbances will expose floodplains to stripping and pulses of large wood recruitment to the floodplain and channel. The widespread uprooting of trees follows hydrodynamic loading from floodwaters and the associated moments of these forces about the tree bases. A tree will uproot when the drag moment exceeds the anchorage resistance capacity. Alternatively, trunks will rupture when the tensile stresses caused by bending exceed the tensile strength of the outer trunk fibres. The likelihood and pattern of trees dislodging during floods on a subtropical river was investigated by developing a tree stability model. The modeling framework included development of a drag moment model and testing several potential formulations for anchorage resistance. Model parameters were calibrated to data collected in experiments and from observations in aerial photographs before and after a large flood in 2011. The prediction accuracy for the adopted tree stability model was 78%. Results from design flood simulations suggest that less than a third of the forest will dislodge even during the largest floods conceivable. This remarkable stability moderates the quantity of large wood recruited from riparian forests during extreme floods, which can impact infrastructure such as bridges and culverts downstream. Low rates of wood recruitment from dislodged floodplain trees in extreme floods suggests bank erosion is the dominant source of wood recruitment in these catchments.","PeriodicalId":21513,"journal":{"name":"River Research and Applications","volume":"152 1","pages":""},"PeriodicalIF":2.2,"publicationDate":"2024-05-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140941228","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

How low is too low? Partnering with stakeholders and managers to define ecologically based low‐flow thresholds in a perennial temperate river 多低才算低？与利益相关者和管理者合作，在一条多年生温带河流中确定基于生态的低流量阈值

IF 2.2 4区环境科学与生态学

River Research and Applications Pub Date : 2024-05-09 DOI: 10.1002/rra.4301

Laura E. Rack, Mary C. Freeman, Ben N. Emanuel, Laura S. Craig, Stephen W. Golladay, Carol Yang, Seth J. Wenger

{"title":"How low is too low? Partnering with stakeholders and managers to define ecologically based low‐flow thresholds in a perennial temperate river","authors":"Laura E. Rack, Mary C. Freeman, Ben N. Emanuel, Laura S. Craig, Stephen W. Golladay, Carol Yang, Seth J. Wenger","doi":"10.1002/rra.4301","DOIUrl":"https://doi.org/10.1002/rra.4301","url":null,"abstract":"Managing aquatic ecosystems for people and nature can be improved by collaboration among scientists, managers, decision‐makers, and other stakeholders. Many collaborative and interdisciplinary approaches have been developed to address the management of freshwater ecosystems; however, there are still barriers to overcome. We worked as part of a regional stakeholder group comprising municipal water utility operators, conservation organizations, academic partners, and other stakeholders to understand the effects of low‐flow and drought on ecological functions of the upper Flint River, Georgia (USA), a free‐flowing river important for municipal water supply, recreation, and native biota. We used published literature and locally targeted studies to identify quantitative flow targets that could be used to inform water management and drought planning. Drawing from principles of Translational Ecology, we relied on an iterative process to develop information needs for the group and maintained communication and engagement throughout data collection, analysis, and synthesis. We identified three quantitative flow benchmarks to evaluate the ecological impacts of drought in the river. The results were valuable to both the water utilities represented in the working group and State regional water planning, which is used to guide water management strategies and permitting for the basin. We identified principles that were important for the successful engagement in the working group and helped to overcome the challenge of working across sectors and without direct authority guiding the implementation of our work. Interdisciplinary work and creative solutions are crucial to plan for and adapt to greater pressure on our water resources.","PeriodicalId":21513,"journal":{"name":"River Research and Applications","volume":"27 1","pages":""},"PeriodicalIF":2.2,"publicationDate":"2024-05-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140941303","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Societal drivers for the integration of hydrogeomorphology and human benefits in river restoration projects 将水文地质和人类利益纳入河流恢复项目的社会驱动力

IF 2.2 4区环境科学与生态学

River Research and Applications Pub Date : 2024-05-08 DOI: 10.1002/rra.4304

Étienne Gariépy‐Girouard, Thomas Buffin‐Bélanger, Pascale M. Biron

{"title":"Societal drivers for the integration of hydrogeomorphology and human benefits in river restoration projects","authors":"Étienne Gariépy‐Girouard, Thomas Buffin‐Bélanger, Pascale M. Biron","doi":"10.1002/rra.4304","DOIUrl":"https://doi.org/10.1002/rra.4304","url":null,"abstract":"Integrating hydrogeomorphological (HGM) principles into the restoration of degraded rivers can achieve sustainable results and provide various human benefits. HGM principles mainly involve understanding the context and processes that shape a fluvial system before any intervention, in order to support its dynamism and to align with its potential functioning and uses. Despite recent management approaches inspired by HGM principles, most restoration projects carried out in Quebec (Canada) are not process‐based and target specific one‐dimensional objectives. Although there is an overall lack of post‐project monitoring, several projects appear to have failed or had mixed success. This research aims to shed light on the diversity of societal drivers behind river restoration projects and to examine how they influence the integration of HGM principles and human benefits. Four restoration projects were characterized through participant observation and interviews with the organizations running them. Representatives of two ministries involved in river restoration and management were also interviewed. The results show that projects were mainly shaped by public acceptance disregarding HGM principles, which can lead to poorly‐informed action. Project funding and stakeholders' expertise have also challenged project implementation and played a key role in defining their objectives. The addition of these components improve the current analytical frameworks for identifying river restoration objectives. Depending on specific sociocultural, political and legislative contexts, funding programs and stakeholders' expertise may either facilitate or restrict the integration of HGM principles and human benefits in the projects. Recognizing these key drivers reframes river restoration as a fundamentally social activity and enlightens how they could impel innovative approaches towards more sustainable results.","PeriodicalId":21513,"journal":{"name":"River Research and Applications","volume":"8 1","pages":""},"PeriodicalIF":2.2,"publicationDate":"2024-05-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140941499","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Hyporheic exchange flows in a mountainous river catchment identified by distributed temperature sensing 通过分布式温度传感器确定山区河流集水区的微流体交换流

IF 2.2 4区环境科学与生态学

River Research and Applications Pub Date : 2024-05-08 DOI: 10.1002/rra.4306

Kristin Peters, Sven F. Grantz, Jens Kiesel, Jörg Lewandowski, Nicola Fohrer

{"title":"Hyporheic exchange flows in a mountainous river catchment identified by distributed temperature sensing","authors":"Kristin Peters, Sven F. Grantz, Jens Kiesel, Jörg Lewandowski, Nicola Fohrer","doi":"10.1002/rra.4306","DOIUrl":"https://doi.org/10.1002/rra.4306","url":null,"abstract":"Elevated stream temperatures under low‐flows, exacerbated by global warming, are a stressor that affects aquatic species directly or in combination with other stressors. Stream temperatures are influenced by energy fluxes across the air–water interface as well as by hydrological exchange processes occurring at the water–riverbed interface. Small‐scale stream temperature dynamics influenced by exchange flows are still underrepresented in stream temperature research. To investigate high‐resolution temperature dynamics and hydrological exchange processes at the sediment–water interface we applied fiber‐optic distributed temperature sensing (FO‐DTS) at two sites in the mountainous Kinzig catchment combined with mapping and measurement of additional environmental conditions. Two types of temperature anomalies could be observed at one site under conditions of low flow and high air temperature. Dampening effects coincided with riverine features such as pools, vegetation roots, fine sediment, and signs of streambank seepage which indicated hyporheic exchange flows. Increased heating of the substrate during the day was identified in shallow sections where sediment was exposed to the air and shading from riparian vegetation was patchy. At another site, at which the cable could not be buried because of the sediment composition, temperature anomalies in the overlying water indicated diffuse groundwater exfiltration. The results show that small‐scale processes in the hyporheic zone, low water tables, and riparian shading influence stream temperature in mountainous streams and can be identified with FO‐DTS under suitable conditions. The results improve our understanding of stream temperatures (in the hyporheic zone) and provide important information on how to improve hydrological modeling.","PeriodicalId":21513,"journal":{"name":"River Research and Applications","volume":"32 1","pages":""},"PeriodicalIF":2.2,"publicationDate":"2024-05-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140941294","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Timescales of tree‐covered island dynamics on the mixed bedrock‐alluvial anabranching Vaal River, South Africa 南非瓦尔河基岩-冲积混合支流上树木覆盖岛屿动态的时间尺度

IF 2.2 4区环境科学与生态学

River Research and Applications Pub Date : 2024-05-07 DOI: 10.1002/rra.4296

S. Tooth, A. Keen‐Zebert, M. C. Grenfell, G. Addison

{"title":"Timescales of tree‐covered island dynamics on the mixed bedrock‐alluvial anabranching Vaal River, South Africa","authors":"S. Tooth, A. Keen‐Zebert, M. C. Grenfell, G. Addison","doi":"10.1002/rra.4296","DOIUrl":"https://doi.org/10.1002/rra.4296","url":null,"abstract":"Previous research on mixed bedrock‐alluvial anabranching rivers has documented how alluvial islands commonly grow under vegetation influences atop slowly eroding bedrock templates, but timescales of island dynamics remain poorly constrained. We focus on the Vaal River near Parys, South Africa, and combine field investigations, aerial image analyses and optically stimulated luminescence (OSL) dating to establish timescales of initiation, growth and erosion for nine bedrock‐cored, tree‐covered, alluvial islands. For each island, two OSL samples were collected in vertical succession from sand‐rich exposures up to 4 m in thickness to establish minimum ages for island initiation (~1802 to 243 years) and to estimate local vertical aggradation rates (~0.20 to 1.8 cm year−1). The diachronous lower ages and lack of systematic upstream‐downstream trend in island age support an interpretation of patchwork initiation, growth, and erosion of islands throughout the late Holocene. Following island initiation, vertical island aggradation occurs in association with establishment of reeds, shrubs and trees, but erosion of island margins or dissection by cross‐cutting channels also can occur. Observations during and after recent large floods (peak discharges >3000 m3 s−1) provide further insights into island dynamics, including the influence of exotic trees (e.g., Eucalyptus spp.) that have colonised many islands in the postcolonial era (last ~150 years). Our findings extend previous conceptual models by constraining timescales of island dynamics and providing new insights into island stability and longevity in mixed bedrock‐alluvial anabranching rivers. Improved communication of findings regarding island geomorphology, ecology and stability can benefit local community engagement, geo/eco‐tourism and education activities, and land use planning.","PeriodicalId":21513,"journal":{"name":"River Research and Applications","volume":"27 1","pages":""},"PeriodicalIF":2.2,"publicationDate":"2024-05-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140941297","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Towards biogeomorphic river restoration: Vegetation as a critical driver of physical habitat 努力恢复河流的生物地貌：植被是物理生境的关键驱动因素

IF 2.2 4区环境科学与生态学

River Research and Applications Pub Date : 2024-05-06 DOI: 10.1002/rra.4288

Rossa O'Briain, Dov Corenblit, Virginia Garófano‐Gómez, Ciara O'Leary

{"title":"Towards biogeomorphic river restoration: Vegetation as a critical driver of physical habitat","authors":"Rossa O'Briain, Dov Corenblit, Virginia Garófano‐Gómez, Ciara O'Leary","doi":"10.1002/rra.4288","DOIUrl":"https://doi.org/10.1002/rra.4288","url":null,"abstract":"The current focus of river restoration on flow and sediment transfer without proper consideration of vegetation as a key structuring agent, beyond its stabilising effect, is too simplistic. We contend that vegetation has an essential role in shaping the physical fluvial environment and should be considered equally alongside hydrogeomorphic processes in restoration projects. In support, we introduce engineer plants as important controls, along with flowing water and transported sediments, on the morphodynamics of river systems and associated physical habitat development. The effect of vegetation on channel planform is then summarised, the influence of vegetation on hydrogeomorphic connectivity is outlined, and then the role of vegetation in landform development and habitat provision, as encapsulated in the fluvial biogeomorphic succession model, is described. We then present examples demonstrating how vegetation has contributed to the recovery of degraded rivers through biogeomorphic processes. Finally, we advance the concept of biogeomorphic river restoration by proposing principles to support a closer synthesis of the component sciences and list key areas for practitioners to focus on. Vegetation succession has a significance that goes beyond its physical structure or influence on sediment stability. In many river settings, it is central to channel evolution. The coupled assembly of plant communities and fluvial landforms affect the development of spatially and temporally dynamic habitat through biogeomorphic interactions. Restoration approaches that do not fully consider this dynamic may fail to anticipate river behaviour and recovery trajectories.","PeriodicalId":21513,"journal":{"name":"River Research and Applications","volume":"23 1","pages":""},"PeriodicalIF":2.2,"publicationDate":"2024-05-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140887679","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Estimating catchment‐scale sediment storage in a large River Basin, Colorado River, USA 美国科罗拉多河大型流域集水尺度沉积物储量估算

IF 2.2 4区环境科学与生态学

River Research and Applications Pub Date : 2024-05-06 DOI: 10.1002/rra.4300

John T. Kemper, Richard Knox, Muhammad Raffae, Evan Schulz, Ryan Bailey, Ryan R. Morrison, Ellen Wohl

{"title":"Estimating catchment‐scale sediment storage in a large River Basin, Colorado River, USA","authors":"John T. Kemper, Richard Knox, Muhammad Raffae, Evan Schulz, Ryan Bailey, Ryan R. Morrison, Ellen Wohl","doi":"10.1002/rra.4300","DOIUrl":"https://doi.org/10.1002/rra.4300","url":null,"abstract":"Catchment‐scale sediment storage is conceptualized as increasing in magnitude downstream, although reach‐scale controls may override this trend. We use empirical data from a literature review and two numerical models to quantitatively estimate sediment storage across the Colorado River Basin, USA. We use assumed alluvial thickness with floodplains delineated in the GFPLAIN model from 30 m digital elevation models. We use the SWAT+ model based on model‐estimated (i) groundwater storage and (ii) sediment storage. Existing studies indicate that sediment stored in floodplains and on low terraces is ~0.3–6 m thick. A first‐order approximation of volumetric storage capacity for natural floodplains is ~105 m3 per km. Sediment storage volumes of floodplains are ~108–1011 m3 over river lengths of 101–103 m. For the modeling estimates, we evaluated sediment storage by stream order and by elevation band within the Upper and Lower Colorado River Basins. Comparisons among the outputs cause us to place more confidence in the GFPLAIN and SWAT+ aquifer volume estimates. Each method includes substantial uncertainty and constitutes a first‐order approximation. Results suggest using 21 and 130 billion cubic meters as approximate lower and upper bounds for total sediment storage in the Upper Basin and 314 and 482 billion cubic meters as approximate lower and upper bounds for the Lower Basin. The largest proportion of sediment is stored in the montane and steppe zones in the Upper Basin and in the Sonoran zone in the Lower Basin.","PeriodicalId":21513,"journal":{"name":"River Research and Applications","volume":"12 1","pages":""},"PeriodicalIF":2.2,"publicationDate":"2024-05-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140887589","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Fish behavior at the horizontal screen of a novel shaft hydropower plant 新型竖井水电站水平筛上的鱼类行为

IF 2.2 4区环境科学与生态学

River Research and Applications Pub Date : 2024-05-03 DOI: 10.1002/rra.4302

Nicole Funk, Josef Knott, Joachim Pander, Juergen Geist

{"title":"Fish behavior at the horizontal screen of a novel shaft hydropower plant","authors":"Nicole Funk, Josef Knott, Joachim Pander, Juergen Geist","doi":"10.1002/rra.4302","DOIUrl":"https://doi.org/10.1002/rra.4302","url":null,"abstract":"Preventing fish entrainment during their downstream passage at hydropower plants remains a major challenge in reducing the ecological impacts of hydropower production. We investigated fish behavior at the world's first innovative shaft hydropower plant with its novel screen concept, aiming at reducing fish entrainment due to the fully horizontal arrangement of the screen and low vertical suction effects toward the turbine. Based on ARIS sonar recordings, we assessed whether fish could move unhindered across the turbine intake area toward the bypass corridors at the sluice gate for safe downstream passage. For a range of species (Anguilla anguilla, Barbus barbus, Thymallus thymallus, Salmo trutta, and Hucho hucho) and operation modes (high/low turbine load), we assessed behavioral patterns such as screen avoidance, dwelling behavior, and search behavior at the screen. Contrary to the engineers' expectations, the innovative screen arrangement neither guided the fish away from the turbine intake to the bypass corridors nor prevented them from swimming vertically into the turbine shaft. Rather, fish freely moved near the screen and avoidance behavior was only rarely observed. Both the dwelling and active search behavior, which was particularly evident in eel, are directly linked to an increased risk of screen passage and subsequent turbine‐related death or injuries. Our findings illustrate that consideration of fish behavior at turbine inlet structures is a crucial component which needs to be integrated with other variables such as fish mortality and injury patterns for a comprehensive evaluation and improvement of fish passage at hydropower plants.","PeriodicalId":21513,"journal":{"name":"River Research and Applications","volume":"119 1","pages":""},"PeriodicalIF":2.2,"publicationDate":"2024-05-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140841323","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0