Journal of ecohydraulics最新文献

{"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":null,"pages":null},"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":"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":null,"pages":null},"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":"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":null,"pages":null},"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":"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":null,"pages":null},"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":null,"pages":null},"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":null,"pages":null},"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":null,"pages":null},"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}

{"title":"Impact assessment of climate change on environmental flow component and water temperature—Kikuchi River","authors":"R. Morid, Y. Shimatani, Tatsuro Sato","doi":"10.1080/24705357.2019.1663713","DOIUrl":"https://doi.org/10.1080/24705357.2019.1663713","url":null,"abstract":"Abstract The Japanese archipelago extends over a large distance from north to south exposed to the effects of climate change. The aim of this study was to assess the impacts of climate change on environmental components by using hydrological indicators. The future climate change in the region was initially projected using HadGEM2-ES and MICRO5 models in three 20-year periods (2021–2040, 2041–2060 and 2061–2080), considering two representative concentration pathways (RCP4.5 & RCP8.5). The Kikuchi streamflow was then simulated using Soil and Water Assessment Tool modelling for the baseline (1986–2016) and future periods. Finally, the magnitude, duration, timing, and frequency of extreme flows were analysed using Indicators of Hydrologic Alteration software. The results showed a decrease in discharge under both models; however, a 2 m3/s increase was predicted under HadGEM2-ES (RCP4.5) in 2041–2060. Changes in river flow affect habitat suitability in aquatic ecosystems, and might have further impacts if the effects of water temperature are also considered. In our case study, water temperature was predicted to increase by up to 4 °C by 2080. This phenomenon will change habitat suitability, because important environmental flow components, such as the peaks of high flows and large flood frequency, will also increase.","PeriodicalId":93201,"journal":{"name":"Journal of ecohydraulics","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2019-07-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"79888670","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":"Habitat evaluation for the endangered fish species Lefua echigonia in the Yagawa River, Japan","authors":"M. De-Miguel-Gallo, F. Martínez‐Capel, R. Muñoz‐Mas, S. Aihara, Y. Matsuzawa, Shinji Fukuda","doi":"10.1080/24705357.2019.1614886","DOIUrl":"https://doi.org/10.1080/24705357.2019.1614886","url":null,"abstract":"Abstract Spring-fed streams in Tokyo are important habitats for various aquatic species, whereas urbanization as well as introduction of invasive species is threatening the sustainability of such aquatic ecosystems. This study applies the System for Environmental Flow Analysis (SEFA) in a small urban river in Tokyo to assess the dynamics of the suitable habitats for the endangered freshwater fish Lefua echigonia (Jordan and Richardson 1907). A set of Habitat Suitability Curves (HSCs) for water depth, velocity and substrate was developed to evaluate the suitable habitats. The habitat assessment indicated that the Area Weighted Suitability (AWS) reached the maximum at 0.02 m3/s, which is close to the base flow of the target river; a gradual decrease in AWS was observed for higher flows. The temporal distribution of AWS, during forty-one consecutive months, showed that, on average, the best habitat conditions for adult L. echigonia occur during the period between January and July, whereas the worst situation occurs during the period between August and December. This work presents information and tools for instream habitat analysis that should help managers to conserve this aquatic species and prioritize actions to further rehabilitate urban rivers, using L. echigonia as a case study.","PeriodicalId":93201,"journal":{"name":"Journal of ecohydraulics","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2019-05-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"85781656","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":"Flow interactions with an aquatic macrophyte: a field study using stereoscopic particle image velocimetry","authors":"H. Biggs, V. Nikora, C. Gibbins, S. Cameron, K. Papadopoulos, Michael Stewart, S. Fraser, D. Vettori, M. Savio, M. O’Hare, M. Kucher, D. Hicks","doi":"10.1080/24705357.2019.1606677","DOIUrl":"https://doi.org/10.1080/24705357.2019.1606677","url":null,"abstract":"Abstract This paper reports the morphology of a natural patch of Ranunculus penicillatus and presents high-resolution measurements of flow velocities in its wake using a stereoscopic PIV field measurement system. The patch was 3.80 m long, 1.24 m wide and caused substantial changes to downstream mean velocities and turbulence. Vertical profiles of streamwise mean velocity were not logarithmic and flow was redirected under the positively buoyant canopy, enhancing vertical turbulent mixing in the wake and generating a large region where the velocity covariance was positive. Turbulent kinetic energy was enhanced downstream from the patch lateral shear layer, but not at the centre of the wake. Spectra downstream from the patch showed that turbulence was neither dominated by fine-scale nor large-scale structures, likely due to the low energy of the flow conditions and lack of a developed vortex street within the measurement domain. Sedimentation was observed at the upstream end of the patch, but not underneath the floating canopy. The methods and results of this work will be useful for planning other in situ studies. Also, the reported data on macrophyte geometry and biometrics will assist with the design of more realistic replicas for use in laboratory studies.","PeriodicalId":93201,"journal":{"name":"Journal of ecohydraulics","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2019-05-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"85705776","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}