Journal of ecohydraulics最新文献

{"title":"Swimming performance of Arctic grayling (Thymallus arcticus Pallas) in an open-channel flume","authors":"David R. Dockery, Erin Ryan, K. Kappenman, Matt Blank","doi":"10.1080/24705357.2019.1599306","DOIUrl":"https://doi.org/10.1080/24705357.2019.1599306","url":null,"abstract":"Abstract Installing effective fish passage structures that provide connectivity for Arctic grayling is a promising conservation strategy for imperiled populations. The swimming abilities and behaviour of age 1+ adfluvial grayling from Montana were examined in an open-channel flume to provide design information for passage structures. Swimming behaviours and distance of ascent (Dmax) in a 12.25 m section was measured at four velocities (0.49, 1.04, 1.43, 2.26 m/s) at an average temperature of 11.3 °C (SD = 0.7); effects of fish length and time of day were also examined. Median Dmax was equal to 12.25 m for all treatments except the 2.26 m/s treatment, where it dropped to 4.5 m. Average fish swimming velocities increased from 0.85 to 2.97 m/s from the lowest to the highest velocity treatments and the maximum velocity observed was 4.03 m/s. Survival model parameterization allowed prediction of the proportion passing relative to distance for covariate values within the range tested. There was strong evidence Dmax was related to water velocity (p < 0.001) and an 82% decrease in Dmax is estimated for every 1 m/s increase in water velocity. There was no evidence for relationships among distance of ascent and fish length (p = 0.91) or time of day (p = 0.81).","PeriodicalId":93201,"journal":{"name":"Journal of ecohydraulics","volume":"25 1","pages":"31 - 42"},"PeriodicalIF":0.0,"publicationDate":"2020-01-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"84414660","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}

{"title":"Hydraulic design aspects of rock-weir fishways with notch for habitat connectivity","authors":"A. Baki, D. Zhu, A. Harwood, A. Lewis, Katie Healey","doi":"10.1080/24705357.2019.1652706","DOIUrl":"https://doi.org/10.1080/24705357.2019.1652706","url":null,"abstract":"Abstract Nature-like fishways have been installed at many migration barriers in recent years to mitigate the effects of human development and habitat fragmentation on fish. The design of these fishways determines the flow characteristics and ultimately the success of these passage facilities. This study numerically investigates the hydraulic properties associated with small passage openings (notch) that are provided in rock-weir-type fishways. Two distinct flow regimes, weir and transitional, were identified. The rock-weir with notch ensured suitable hydraulics for fish migration and sufficient fish resting areas in weir pools. A dimensionless weir coefficient was introduced to existing depth–discharge relationships to compute the weir flow more accurately. A reduction factor for the maximum velocity was also proposed as a function of discharge. This study optimized the design of rock-weir fishways considering passage notches based on fish resting zones, volumetric dissipated power, and performance for upstream fish migration.","PeriodicalId":93201,"journal":{"name":"Journal of ecohydraulics","volume":"16 1","pages":"109 - 94"},"PeriodicalIF":0.0,"publicationDate":"2020-01-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"89163993","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}

{"title":"Effect of instream logs on bank erosion potential: a flume study with a single log","authors":"Nuosha Zhang, I. Rutherfurd, M. Ghisalberti","doi":"10.1080/24705357.2019.1634499","DOIUrl":"https://doi.org/10.1080/24705357.2019.1634499","url":null,"abstract":"Abstract It is well established that riparian trees reduce bank erosion. However, fallen trees can increase bank erosion as the flow is deflected and accelerated between the log and its root-plate and the bank face, increasing the boundary shear stress and eroding the bank. This erosion contributes to hydraulic variability but can also be a concern in restoring wood loads in rivers. In this first quantitative study into this phenomenon, we develop a theoretical hydraulic model to estimate the near-bank velocity around a single log using principles of continuity and energy loss for a range of log characteristics (morphology, angle, distance from the bank) and flow characteristics. Flume experiments support the theoretical model and suggest that a single log can almost double the near-bank velocity. The fractional channel area taken up by the log (blockage ratio) and the distance between the log and the bank are key factors governing the near-bank velocity. The smaller the angle of the log with the bank the lower the erosion rate, but also the further downstream the erosion extends. As the morphology of the log changes after falling into the channel, bank erosion potentially develops quickly, but slows over time; and migrates downstream.","PeriodicalId":93201,"journal":{"name":"Journal of ecohydraulics","volume":"84 1","pages":"43 - 56"},"PeriodicalIF":0.0,"publicationDate":"2020-01-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"89431972","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}

{"title":"A case-study evaluating river rehabilitation alternatives and habitat heterogeneity using the hydromorphological index of diversity","authors":"W. Gostner, W. Annable, Anton Schleiss, M. Paternolli","doi":"10.1080/24705357.2019.1680320","DOIUrl":"https://doi.org/10.1080/24705357.2019.1680320","url":null,"abstract":"Abstract Concurrent rehabilitation alternatives were evaluated for a 1900 m reach of the River Etsch in northern Italy using a recently developed Hydro Morphological Index of Diversity (HMID) model. HMID is a new tool enabling quantitative assessments of river restoration alternatives on ecologically relevant scales. The model is able to characterize both the spatial and temporal hydrodynamic variability, in relation to morphological characteristics, and thereby to assess the overall physical habitat variability imparted by different restoration alternatives. Three habitat alternatives were evaluated (boulder clusters, groynes, alternating bars) and compared to existing conditions where a prismatic channel exists. The placement of boulder clusters represented the simplest and cheapest option to implement but produced marginal improvements in the aquatic habitat. Installation of groynes resulted in moderate increases to spatial habitat variability, resulting in the largest capital investment. The introduction of alternating bars within a modestly increased channel width produced the greatest increase in physical habitat diversity and thus morphodynamic complexity while resulting in moderate capital investment construction costs compared to a full geomorphic restoration. The alternating bar rehabilitation alternative also supported the greatest habitat diversity and lowest variation in hydraulic conditions under low-flow conditions.","PeriodicalId":93201,"journal":{"name":"Journal of ecohydraulics","volume":"17 1","pages":"1 - 16"},"PeriodicalIF":0.0,"publicationDate":"2019-12-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"75159295","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}

{"title":"Advancing ecohydraulics and ecohydrology by clarifying the role of their component interdisciplines","authors":"Marie-Pierre Gosselin, V. Ouellet, A. Harby, J. Nestler","doi":"10.1080/24705357.2019.1658137","DOIUrl":"https://doi.org/10.1080/24705357.2019.1658137","url":null,"abstract":"Abstract Increasing awareness of the complexity of river ecosystems has led to the emergence of integrative disciplines that combine topics in river physical and ecological processes, exemplified by the disciplines of ecohydrology, hydroecology and ecohydraulics. However, the names of these disciplines are often referred to interchangeably without attention paid to their meaning. This ambiguity impairs the efficient development and widespread promotion of these fields of study and their applications. To address this issue, we strive to clarify the definitions and contributions of the different disciplines. This is done by exploring their interrelationships and providing a reference for the integration of disciplines in these evolving fields. Finally, we advocate for ecohydrology and ecohydraulics to be considered complementary, and not duplicative, disciplines within river science. We further argue that awareness of their similarities and differences is important to address key issues in river science and to ensure ecohydraulics finds its positioning with respect to other disciplines, as well as current and emerging societal and scientific challenges, such as climate change.","PeriodicalId":93201,"journal":{"name":"Journal of ecohydraulics","volume":"1 1","pages":"172 - 187"},"PeriodicalIF":0.0,"publicationDate":"2019-07-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1080/24705357.2019.1658137","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"72516624","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}

{"title":"International contributions in advancing ecohydraulics","authors":"","doi":"10.1080/24705357.2019.1697846","DOIUrl":"https://doi.org/10.1080/24705357.2019.1697846","url":null,"abstract":"","PeriodicalId":93201,"journal":{"name":"Journal of ecohydraulics","volume":"17 1","pages":"85 - 85"},"PeriodicalIF":0.0,"publicationDate":"2019-07-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"82057167","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}

{"title":"Long-term changes in riparian forest cover under a dam-induced flow scheme: the accompanying a numerical modelling perspective","authors":"Bhagya Nallaperuma, T. Asaeda","doi":"10.1080/24705357.2019.1663714","DOIUrl":"https://doi.org/10.1080/24705357.2019.1663714","url":null,"abstract":"Abstract River regulation affects downstream riparian vegetation dynamics. This paper investigates changes in vegetation cover along a steep reach of the Kitakami river in Japan, below the Gosho dam. Historical aerial imagery covering 60-years of both the pre- and post- dam construction phases is used to document land cover evolution. Changes in riparian forest cover are evaluated in relation to the corresponding hydrological regimes. A long-term trend in forest cover encroachment was revealed and a temporal correlation analysis confirmed a clear association with the modified water and sediment regime downstream of the dam. In addition, a numerical simulation of changes in spatial tree distribution using the dynamic riparian vegetation model (DRIPVEM) was undertaken. Validation of the simulation using the Kappa statistic showed a moderate-to-substantial agreement between model output and the photographic record.","PeriodicalId":93201,"journal":{"name":"Journal of ecohydraulics","volume":"161 1","pages":"106 - 112"},"PeriodicalIF":0.0,"publicationDate":"2019-07-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"74257607","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}

{"title":"Artificial fishways and their performances in China’s regulated river systems: a historical synthesis","authors":"Jinlong Liu, G. Kattel, Zhongjing Wang, Mengzhen Xu","doi":"10.1080/24705357.2019.1644977","DOIUrl":"https://doi.org/10.1080/24705357.2019.1644977","url":null,"abstract":"Abstract China‘s rivers are highly regulated. The biodiversity and ecosystems of these rivers are threatened by barriers restricting fish movements for reproduction and foraging. To overcome this challenge, several fishways are built across the country. However, the status of fishways is not well investigated. Based on published articles, library archives, and public interviews, we have identified type, location and period of fishways construction. We have then evaluated the performance of fishways. Up until 2018, the total number of fishways in China was estimated to be 150, where 82 of them have been analyzed in this study. The pool-type fishway is the most dominant fishway type, which accounts for 83%. The slope pattern of the 49 pool-type fishways shows that the slope tends to decrease with increasing lifting height. The performance of the fishways was best observed by the successful crossing of different species of fish in Yangtze and Pearl River basins when the slopes were 1:63–1:95. When many dams in China are already facing critical challenges for adopting the right type of fishways, the pool-type fishways with variable adjustments of slopes could be an effective option for successful fish migrations in regulated river systems.","PeriodicalId":93201,"journal":{"name":"Journal of ecohydraulics","volume":"22 1","pages":"158 - 171"},"PeriodicalIF":0.0,"publicationDate":"2019-07-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"85612751","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}

{"title":"International contributions in advancing ecohydraulics","authors":"S. Fukuda, N. Tanaka, Y. Yasuda, R. Tsubaki, K. Muraoka, T. Asaeda","doi":"10.1080/24705357.2019.1697845","DOIUrl":"https://doi.org/10.1080/24705357.2019.1697845","url":null,"abstract":"Ecohydraulics as a research discipline deals with a wide range of topics related to water and ecosystems, thereby contributing to sustainable development goals (SDGs) of the United Nations as pointed out in Findkakis (2017). In Ecohydraulics, interdisciplinary approaches based on hydraulics, hydrology, geomorphology, and aquatic and riparian ecology have been adopted in order to tackle real-world problems in aquatic ecosystems that have complex, inter-related dynamics in space and time (Maddock et al. 2013). The importance of interdisciplinary approaches has now been widely recognized for solving water-related issues in the world specifically by working with nature (WWAP/UN-Water, 2018; Katopodis and Aadland 2006). With such global trends becoming more evident and advances in technology, ecological, biological as well as physical sciences occurring more rapidly, the context was set in organizing the 12 International Symposium on Ecohydraulics (ISE2018) was held in Tokyo, Japan from August 19 to 24, 2018. There was large attendance with a total of 484 participants from 35 countries. More than 400 papers including 6 plenary talks were presented. The plenary talks delivered in the symposium were as follows: “Passage for diadromous fishes” by Prof. Katsumi Tsukamoto (Nihon University, Japan), “Use of nearcensus ecohydraulics in river restoration” by Prof. Gregory B. Pasternack (UC Davis, USA), “How vegetation ecohydrology is changing river management: a primer for all” by Dr. Matthew O’Hare (Centre for Ecology and Hydrology (CEH), UK), “Genomic tools in freshwater ecosystem research and monitoring” by Dr. Michael Monaghan (Leibniz-Institute of Freshwater Ecology and Inland Fisheries (IGB), Germany), “The 2018 Brisbane Declaration and Global Action Agenda: A global status report and call for e-flows scientists and engineers to engage” by Prof. Michael McClain (IHE Delft Institute for Water Education, The Netherlands), and “The Ecohydraulics of River Basins” by Prof. Michael Stewardson (University of Melbourne, Australia). The six keynotes on river vegetation, river restoration, genomics, e-flows and fish passage aimed to provide a deeper understanding of these topics and to foster research activities in the Ecohydraulic Community. Special Sessions, targeting specific ecohydraulic topics, were organized by many ecohydraulicians from around the globe. In addition to these major topics in Ecohydraulics, we observed three emerging topics in the symposium, namely innovative measurement techniques, Ecosystem-based Disaster Risk Reduction (Eco-DRR), and advanced genomics. Innovative measurement techniques such as image-based, optoelectronic and hydroacoustic methods are emerging together with the development of advanced machine learning. Such a development should lead to innovative monitoring systems which can provide new data for a deeper understanding of complex ecological and hydrodynamic phenomena as well as the development of advanced modelling approach","PeriodicalId":93201,"journal":{"name":"Journal of ecohydraulics","volume":"38 1","pages":"86 - 87"},"PeriodicalIF":0.0,"publicationDate":"2019-07-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"76174294","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}

{"title":"Remote sensing of tracer dye concentrations to support dispersion studies in river channels","authors":"C. Legleiter, R. McDonald, J. Nelson, P. Kinzel, R. Perroy, Donghae Baek, I. Seo","doi":"10.1080/24705357.2019.1662339","DOIUrl":"https://doi.org/10.1080/24705357.2019.1662339","url":null,"abstract":"Abstract We evaluated the potential of remote sensing to enhance tracer experiments by providing spatially distributed information on visible dye concentration. During tests in an experimental facility and a large natural channel, we measured Rhodamine WT concentration and spectral reflectance. As an initial proof-of-concept at the River Experiment Center in Korea, a small unmanned aircraft system (sUAS) was used to acquire hyperspectral images of a sinuous outdoor flume. On the Kootenai River, field spectra were collected from a boat and hyperspectral images and high resolution aerial photographs were obtained from manned aircraft. We modified an Optimal Band Ratio Analysis algorithm to identify wavelength combinations that yielded strong correlations between a spectrally based quantity X and dye concentration C. Both the flume and field tests yielded very strong (R2 from 0.94 to 0.99) relationships between X and C across a broad range of visible wavelengths. On the Kootenai, we found that X vs. C relations derived from field spectra could be applied to hyperspectral images and that dye concentrations could be estimated nearly as reliably from three-band images as from hyperspectral data. These results imply that remote sensing could become a powerful tool for mapping dye patterns. Such a capability would advance our understanding of dispersion processes by enabling more rigorous testing of numerical flow models.","PeriodicalId":93201,"journal":{"name":"Journal of ecohydraulics","volume":"8 1","pages":"131 - 146"},"PeriodicalIF":0.0,"publicationDate":"2019-07-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"74162464","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}