Detention basins, typically installed adjacent to rivers, prevent the rise in water levels downstream by temporarily storing river water. Furthermore, these basins potentially promote biodiversity by creating floodplains as refuges during floods. The heights of the inlet dikes, which divert river water into the basins during floods, are designed just below the flood elevation to maximise disaster prevention. However, the accessibility of these artificial basins to organisms during floods is uncertain, primarily due to the design of the inlet dikes. Herein, we experimentally examined the effect of the height of these inlets on fish entering the detention basins during floods. The Aqua Restoration Research Center created small‐scale detention basins next to the experimental streams to induce artificial flooding using movable water gates. We controlled the height of the inlet boards to simulate an inlet dike and recorded the number of fishes that entered these basins during an experimental flood. The number of individuals moving into the basins increased as the height of the inlet board decreased. No fish were captured in the basins with the highest inlet board, which was set just below the experimental flood level. While the detention basin needs to be of a certain height of the inlet for effective flood control, we suggest a solution that may be possible to achieve both objectives, disaster prevention and biodiversity conservation, by altering the inlet location, with reference to a Japanese traditional flood reduction installation, the Kasumi‐tei.
{"title":"Effects of inlet height of detention basins on fish movement to refuges during floods","authors":"Hikaru Nakagawa, Yuki Matsuzawa, Akira Nagayama, Yoshihiro Agata, Seiya Okamoto, Shinichi Masuda, Takao Aikawa, Taihei Sakamoto, Takanori Kono, Kazufumi Hayashida, Terutaka Mori","doi":"10.1002/rra.4357","DOIUrl":"https://doi.org/10.1002/rra.4357","url":null,"abstract":"Detention basins, typically installed adjacent to rivers, prevent the rise in water levels downstream by temporarily storing river water. Furthermore, these basins potentially promote biodiversity by creating floodplains as refuges during floods. The heights of the inlet dikes, which divert river water into the basins during floods, are designed just below the flood elevation to maximise disaster prevention. However, the accessibility of these artificial basins to organisms during floods is uncertain, primarily due to the design of the inlet dikes. Herein, we experimentally examined the effect of the height of these inlets on fish entering the detention basins during floods. The Aqua Restoration Research Center created small‐scale detention basins next to the experimental streams to induce artificial flooding using movable water gates. We controlled the height of the inlet boards to simulate an inlet dike and recorded the number of fishes that entered these basins during an experimental flood. The number of individuals moving into the basins increased as the height of the inlet board decreased. No fish were captured in the basins with the highest inlet board, which was set just below the experimental flood level. While the detention basin needs to be of a certain height of the inlet for effective flood control, we suggest a solution that may be possible to achieve both objectives, disaster prevention and biodiversity conservation, by altering the inlet location, with reference to a Japanese traditional flood reduction installation, the Kasumi‐tei.","PeriodicalId":21513,"journal":{"name":"River Research and Applications","volume":"16 1","pages":""},"PeriodicalIF":2.2,"publicationDate":"2024-07-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141870917","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}
Joseph R. Benjamin, Jason B. Dunham, Nicholas Scheidt, Carla Rothenbuecher, Cory Sipher
Assisted migration is a means of introducing a species into a previously unoccupied area. Although this idea is relatively new for many species, there are many extant examples involving fish that can be instructive. We studied a case of assisted migration where upstream access of migrating adult coho salmon Oncorhynchus kisutch over a naturally impassible barrier was established through construction of fish ladders. Although these passage structures have successfully allowed coho salmon to colonize upstream locations, managers had concerns regarding how efficiently these structures passed fish, as well as questions regarding access to specific upstream habitats, and passage barriers further upstream. To address these concerns, we developed a stage‐based population model to explore: (1) influences of passage over structures, (2) rearing habitats upstream of the structures, and (3) consequences of additional barriers to passage in the system. Model simulations suggest high fish passage at the ladders was associated with the highest smolt and adult abundance of coho salmon. The importance of passage was strongly influenced by juveniles rearing in a lake, where increased lake rearing at each passage scenario increased abundance of smolts and adults. Opening habitat further upstream was estimated to increase adult and smolt abundance up to 12%. Results of model simulations also helped to identify uncertainties that could be evaluated further (e.g., juvenile rearing in the lake). In general, our findings point to the importance of considering a full range of processes that can drive expected outcomes for assisted migration.
{"title":"Assisted migration of coho salmon: Influences of passage and habitat availability on population dynamics","authors":"Joseph R. Benjamin, Jason B. Dunham, Nicholas Scheidt, Carla Rothenbuecher, Cory Sipher","doi":"10.1002/rra.4355","DOIUrl":"https://doi.org/10.1002/rra.4355","url":null,"abstract":"Assisted migration is a means of introducing a species into a previously unoccupied area. Although this idea is relatively new for many species, there are many extant examples involving fish that can be instructive. We studied a case of assisted migration where upstream access of migrating adult coho salmon <jats:italic>Oncorhynchus kisutch</jats:italic> over a naturally impassible barrier was established through construction of fish ladders. Although these passage structures have successfully allowed coho salmon to colonize upstream locations, managers had concerns regarding how efficiently these structures passed fish, as well as questions regarding access to specific upstream habitats, and passage barriers further upstream. To address these concerns, we developed a stage‐based population model to explore: (1) influences of passage over structures, (2) rearing habitats upstream of the structures, and (3) consequences of additional barriers to passage in the system. Model simulations suggest high fish passage at the ladders was associated with the highest smolt and adult abundance of coho salmon. The importance of passage was strongly influenced by juveniles rearing in a lake, where increased lake rearing at each passage scenario increased abundance of smolts and adults. Opening habitat further upstream was estimated to increase adult and smolt abundance up to 12%. Results of model simulations also helped to identify uncertainties that could be evaluated further (e.g., juvenile rearing in the lake). In general, our findings point to the importance of considering a full range of processes that can drive expected outcomes for assisted migration.","PeriodicalId":21513,"journal":{"name":"River Research and Applications","volume":"199 1","pages":""},"PeriodicalIF":2.2,"publicationDate":"2024-07-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141769871","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}
Steven E. Yochum, Tyler Wible, Matthew Korsa, Mahshid Ghanbari, Mazdak Arabi
The Flood Potential Portal (https://floodpotential.erams.com/) has been developed for the contiguous United States, as a practitioner‐focused tool that uses observational data (streamgages) to enhance understanding of how floods vary in space and time, and assist users in making more informed peak discharge predictions for infrastructure design and floodplain management. This capability is presented through several modules. The Mapping module provides tools to explore variability using multiple indices, and provides detailed information, figures, and algorithms describing and comparing flooding characteristics. The Cross‐Section Analysis module allows users to cut regional‐scale sections to interpret the role of topography in driving flood variability. The Watershed Analysis module provides multiple methods for quantifying expected peak discharge magnitudes and flood frequency relationships at user‐selected locations, including the integration of observed trends in flood magnitudes due to climate change and other sources of nonstationarity into decision making. The Streamgage Analysis module performs streamgage flood‐frequency analyses. These modules are based in part on the flood potential method, through the use of 207 zones of similar flood response defined using more than 8200 streamgages with watershed areas <10,000 km2. Regression models that define each zone had high explained variance (average R2 = 0.93). An example is provided to illustrate use of the Flood Potential Portal for the design of a hypothetical bridge replacement.
{"title":"Flood Potential Portal: A web tool for understanding flood variability and predicting peak discharges","authors":"Steven E. Yochum, Tyler Wible, Matthew Korsa, Mahshid Ghanbari, Mazdak Arabi","doi":"10.1002/rra.4354","DOIUrl":"https://doi.org/10.1002/rra.4354","url":null,"abstract":"The Flood Potential Portal (<jats:ext-link xmlns:xlink=\"http://www.w3.org/1999/xlink\" xlink:href=\"https://floodpotential.erams.com/\">https://floodpotential.erams.com/</jats:ext-link>) has been developed for the contiguous United States, as a practitioner‐focused tool that uses observational data (streamgages) to enhance understanding of how floods vary in space and time, and assist users in making more informed peak discharge predictions for infrastructure design and floodplain management. This capability is presented through several modules. The Mapping module provides tools to explore variability using multiple indices, and provides detailed information, figures, and algorithms describing and comparing flooding characteristics. The Cross‐Section Analysis module allows users to cut regional‐scale sections to interpret the role of topography in driving flood variability. The Watershed Analysis module provides multiple methods for quantifying expected peak discharge magnitudes and flood frequency relationships at user‐selected locations, including the integration of observed trends in flood magnitudes due to climate change and other sources of nonstationarity into decision making. The Streamgage Analysis module performs streamgage flood‐frequency analyses. These modules are based in part on the flood potential method, through the use of 207 zones of similar flood response defined using more than 8200 streamgages with watershed areas <10,000 km<jats:sup>2</jats:sup>. Regression models that define each zone had high explained variance (average <jats:italic>R</jats:italic><jats:sup>2</jats:sup> = 0.93). An example is provided to illustrate use of the Flood Potential Portal for the design of a hypothetical bridge replacement.","PeriodicalId":21513,"journal":{"name":"River Research and Applications","volume":"45 1","pages":""},"PeriodicalIF":2.2,"publicationDate":"2024-07-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141785055","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}
Marco Gava, Pascale M. Biron, Thomas Buffin‐Bélanger
Fluvial hazards of river mobility and flooding are often problematic for road infrastructure and need to be considered in the planning process. The extent of river and road infrastructure networks and their tendency to be close to each other creates a need to be able to identify the most dangerous areas quickly and cost‐effectively. In this study, we propose a novel methodology using random forest (RF) machine learning methods to provide easily interpretable fine‐scale fluvial hazard predictions for large river systems. The tools developed provide predictions for three models: presence of flooding (PFM), presence of mobility (PMM) and type of erosion model (TEM, lateral migration, or incision) at reference points every 100 m along the fluvial network of three watersheds within the province of Quebec, Canada. The RF models use variables focused on river conditions and hydrogeomorphological processes such as confinement, sinuosity, and upstream slope. Training/validation data included field observations, results from hydraulic and erosion models, government infrastructure databases, and hydro‐ geomorphological assessments using 1‐m DEM and satellite/historical imagery. A total of 1807 reference points were classified for flooding, 1542 for mobility, and 847 for the type of erosion out of the 11,452 reference points for the 1145 km of rivers included in the study. These were divided into training (75%) and validation (25%) datasets, with the training dataset used to train supervised RF models. The validation dataset indicated the models were capable of accurately predicting the potential for fluvial hazards to occur, with precision results for the three models ranging from 83% to 94% of points accurately predicted. The results of this study suggest that RF models are a cost‐effective tool to quickly evaluate the potential for fluvial hazards to occur at the watershed scale.
{"title":"A random forest machine learning model to detect fluvial hazards","authors":"Marco Gava, Pascale M. Biron, Thomas Buffin‐Bélanger","doi":"10.1002/rra.4353","DOIUrl":"https://doi.org/10.1002/rra.4353","url":null,"abstract":"Fluvial hazards of river mobility and flooding are often problematic for road infrastructure and need to be considered in the planning process. The extent of river and road infrastructure networks and their tendency to be close to each other creates a need to be able to identify the most dangerous areas quickly and cost‐effectively. In this study, we propose a novel methodology using random forest (RF) machine learning methods to provide easily interpretable fine‐scale fluvial hazard predictions for large river systems. The tools developed provide predictions for three models: presence of flooding (PFM), presence of mobility (PMM) and type of erosion model (TEM, lateral migration, or incision) at reference points every 100 m along the fluvial network of three watersheds within the province of Quebec, Canada. The RF models use variables focused on river conditions and hydrogeomorphological processes such as confinement, sinuosity, and upstream slope. Training/validation data included field observations, results from hydraulic and erosion models, government infrastructure databases, and hydro‐ geomorphological assessments using 1‐m DEM and satellite/historical imagery. A total of 1807 reference points were classified for flooding, 1542 for mobility, and 847 for the type of erosion out of the 11,452 reference points for the 1145 km of rivers included in the study. These were divided into training (75%) and validation (25%) datasets, with the training dataset used to train supervised RF models. The validation dataset indicated the models were capable of accurately predicting the potential for fluvial hazards to occur, with precision results for the three models ranging from 83% to 94% of points accurately predicted. The results of this study suggest that RF models are a cost‐effective tool to quickly evaluate the potential for fluvial hazards to occur at the watershed scale.","PeriodicalId":21513,"journal":{"name":"River Research and Applications","volume":"65 1","pages":""},"PeriodicalIF":2.2,"publicationDate":"2024-07-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141769870","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}
Kara J. Anlauf‐Dunn, Benjamin J. Clemens, Matthew R. Falcy, Courtney Zambory
Pacific lamprey (Entosphenus tridentatus), a fish species native to the Pacific Northwest (USA), have distinctive cultural and ecological value but determining their spatial and temporal distribution is challenging due to a general lack systematic monitoring. In this study, we used counts of Pacific lamprey redds to model the probability of occurrence and abundance of Pacific lamprey based on environmental covariates including artificial barriers, assuming higher predicted lamprey redds translates to more suitable spawning habitats. Using generalized linear mixed zero‐inflated models, results suggest that Pacific lamprey abundance was generally lower in high gradient streams, further from the ocean. Stream reaches with warmer spring water temperatures and greater historical median spring flows supported higher abundances. Lamprey occurrence was primarily influenced by spring water temperatures and distance from the ocean. We further observed that when streams warm beyond 18°C, confidence intervals around the abundance estimates widen and zero‐inflation increases, indicating a decrease in occurrence. One objective of the study was to recommend where barrier removal or restoration should be prioritized to increase passage and thus access to upstream habitats. We considered artificial barriers to primarily influence the probability of occurrence through access. The barrier variable in this model had a negative effect on the probability of lamprey occurrence, but it was not a strong predictor in the model. While we are not able to suggest specific locations that would most benefit barrier removal or improvement based on these model results, we can identify the watersheds with a higher probability to support Pacific lamprey and provide potential additional habitats by improving habitat connectivity. Focusing restoration and/ or removal of barriers on watersheds in the Mid‐South region of the Oregon Coast (i.e., Alsea, Siuslaw, Coos, Coquille, and Sixes rivers) with higher habitat suitability could prioritize use of limited funds, increase the probability of benefiting Pacific lamprey, and potentially other native lampreys and migratory (e.g., salmon, steelhead; Oncorhynchus) species. Although this manuscript focuses on the Oregon Coast region, the methods are transferrable to other regions where Pacific lamprey are present.
{"title":"Spatio‐temporal distribution of adult Pacific lamprey Entosphenus tridentatus relative to habitat fragmentation","authors":"Kara J. Anlauf‐Dunn, Benjamin J. Clemens, Matthew R. Falcy, Courtney Zambory","doi":"10.1002/rra.4344","DOIUrl":"https://doi.org/10.1002/rra.4344","url":null,"abstract":"Pacific lamprey (<jats:italic>Entosphenus tridentatus</jats:italic>), a fish species native to the Pacific Northwest (USA), have distinctive cultural and ecological value but determining their spatial and temporal distribution is challenging due to a general lack systematic monitoring. In this study, we used counts of Pacific lamprey redds to model the probability of occurrence and abundance of Pacific lamprey based on environmental covariates including artificial barriers, assuming higher predicted lamprey redds translates to more suitable spawning habitats. Using generalized linear mixed zero‐inflated models, results suggest that Pacific lamprey abundance was generally lower in high gradient streams, further from the ocean. Stream reaches with warmer spring water temperatures and greater historical median spring flows supported higher abundances. Lamprey occurrence was primarily influenced by spring water temperatures and distance from the ocean. We further observed that when streams warm beyond 18°C, confidence intervals around the abundance estimates widen and zero‐inflation increases, indicating a decrease in occurrence. One objective of the study was to recommend where barrier removal or restoration should be prioritized to increase passage and thus access to upstream habitats. We considered artificial barriers to primarily influence the probability of occurrence through access. The barrier variable in this model had a negative effect on the probability of lamprey occurrence, but it was not a strong predictor in the model. While we are not able to suggest specific locations that would most benefit barrier removal or improvement based on these model results, we can identify the watersheds with a higher probability to support Pacific lamprey and provide potential additional habitats by improving habitat connectivity. Focusing restoration and/ or removal of barriers on watersheds in the Mid‐South region of the Oregon Coast (i.e., Alsea, Siuslaw, Coos, Coquille, and Sixes rivers) with higher habitat suitability could prioritize use of limited funds, increase the probability of benefiting Pacific lamprey, and potentially other native lampreys and migratory (e.g., salmon, steelhead; <jats:italic>Oncorhynchus</jats:italic>) species. Although this manuscript focuses on the Oregon Coast region, the methods are transferrable to other regions where Pacific lamprey are present.","PeriodicalId":21513,"journal":{"name":"River Research and Applications","volume":"81 1","pages":""},"PeriodicalIF":2.2,"publicationDate":"2024-07-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141738649","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}
Ground‐penetrating radar (syn. water‐penetrating radar, or WPR hereon) has been used previously in the detection and characterisation of riverine scour. This paper presents field data, equipment calibration and processing output results from a new generation of high dynamic range (HDR) radar systems. These provide a new and more sophisticated model of fluvial scour for the study site. The adaptability for deployment on water, wide bandwidth and good quality in raw and processed data, demonstrates the advantages of the system. Data processing and depth calibration are issues in the interpretation of WPR data, which are both discussed. WPR demonstrates the potential for surveying sedimentation where palaeoscour occurred and thus anticipated. This maybe in conjunction with other techniques or where aquatic vegetation, rocky substrates or methane gas bubble release preclude use of sonar.
{"title":"Water penetrating radar: A fluvial scour study of antenna performance and data processing","authors":"Alastair Ruffell, Amy O'Keefe, Kris Campbell, Myra Lydon","doi":"10.1002/rra.4352","DOIUrl":"https://doi.org/10.1002/rra.4352","url":null,"abstract":"Ground‐penetrating radar (<jats:italic>syn</jats:italic>. water‐penetrating radar, or WPR hereon) has been used previously in the detection and characterisation of riverine scour. This paper presents field data, equipment calibration and processing output results from a new generation of high dynamic range (HDR) radar systems. These provide a new and more sophisticated model of fluvial scour for the study site. The adaptability for deployment on water, wide bandwidth and good quality in raw and processed data, demonstrates the advantages of the system. Data processing and depth calibration are issues in the interpretation of WPR data, which are both discussed. WPR demonstrates the potential for surveying sedimentation where palaeoscour occurred and thus anticipated. This maybe in conjunction with other techniques or where aquatic vegetation, rocky substrates or methane gas bubble release preclude use of sonar.","PeriodicalId":21513,"journal":{"name":"River Research and Applications","volume":"2013 1","pages":""},"PeriodicalIF":2.2,"publicationDate":"2024-07-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141738650","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}
Angela Gurnell, Walter Bertoldi, Robert A. Francis, Geraldene Wharton
{"title":"Special issue: Fluvial biogeomorphology","authors":"Angela Gurnell, Walter Bertoldi, Robert A. Francis, Geraldene Wharton","doi":"10.1002/rra.4330","DOIUrl":"https://doi.org/10.1002/rra.4330","url":null,"abstract":"","PeriodicalId":21513,"journal":{"name":"River Research and Applications","volume":"1 1","pages":""},"PeriodicalIF":2.2,"publicationDate":"2024-07-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141586131","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}
The cover image is based on the Research Article Plants and river morphodynamics: The emergence of fluvial biogeomorphology by A. M. Gurnell and W. Bertoldi, https://doi.org/10.1002/rra.4271. image
封面图像基于研究文章《植物与河流形态动力学》：A. M. Gurnell 和 W. Bertoldi 撰写的《河流生物地貌学的兴起》，https://doi.org/10.1002/rra.4271. 图像
{"title":"Featured Cover","authors":"A. M. Gurnell, W. Bertoldi","doi":"10.1002/rra.4342","DOIUrl":"https://doi.org/10.1002/rra.4342","url":null,"abstract":"The cover image is based on the Research Article <jats:italic>Plants and river morphodynamics: The emergence of fluvial biogeomorphology</jats:italic> by A. M. Gurnell and W. Bertoldi, <jats:ext-link xmlns:xlink=\"http://www.w3.org/1999/xlink\" xlink:href=\"https://doi.org/10.1002/rra.4271\">https://doi.org/10.1002/rra.4271</jats:ext-link>. <jats:boxed-text content-type=\"graphic\" position=\"anchor\"><jats:graphic xmlns:xlink=\"http://www.w3.org/1999/xlink\" mimetype=\"image/png\" position=\"anchor\" specific-use=\"enlarged-web-image\" xlink:href=\"graphic/rra4342-gra-0001-m.png\"><jats:alt-text>image</jats:alt-text></jats:graphic></jats:boxed-text>","PeriodicalId":21513,"journal":{"name":"River Research and Applications","volume":"30 1","pages":""},"PeriodicalIF":2.2,"publicationDate":"2024-07-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141586132","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}
This Special Issue arose from a 1‐day international workshop on the theme of Fluvial Biogeomorphology to mark Professor Angela Gurnell's official retirement. As co‐editors, we felt this Special Issue also afforded an opportunity which we could not let pass by to capture some key aspects of Angela's inspiring and impactful career to date. We have written this Preface to accompany the main Editorial as a celebration of Angela's distinguished career and the many contributions Angela has made to physical geography and in particular fluvial geomorphology. We present an overview of Angela's career, insights into key research areas and contributions through a consideration of her publications, and her work inspiring early career researchers through PhD supervision before some final, more personal, reflections.
{"title":"Celebrating the career of Angela Gurnell","authors":"G. Wharton, W. Bertoldi, R. A. Francis","doi":"10.1002/rra.4328","DOIUrl":"https://doi.org/10.1002/rra.4328","url":null,"abstract":"This Special Issue arose from a 1‐day international workshop on the theme of <jats:italic>Fluvial Biogeomorphology</jats:italic> to mark Professor Angela Gurnell's official retirement. As co‐editors, we felt this Special Issue also afforded an opportunity which we could not let pass by to capture some key aspects of Angela's inspiring and impactful career to date. We have written this Preface to accompany the main Editorial as a celebration of Angela's distinguished career and the many contributions Angela has made to physical geography and in particular fluvial geomorphology. We present an overview of Angela's career, insights into key research areas and contributions through a consideration of her publications, and her work inspiring early career researchers through PhD supervision before some final, more personal, reflections.","PeriodicalId":21513,"journal":{"name":"River Research and Applications","volume":"88 1","pages":""},"PeriodicalIF":2.2,"publicationDate":"2024-07-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141586221","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}
Reuben B. Smit, Damon H. Goodman, Josh Boyce, Nicholas A. Som
Estimating the impacts of water allocation decisions on fish populations and habitat availability is an important part of environmental flow assessments, especially in locations where water resources are limited. Two‐dimensional hydrodynamic models (2DHMs) are commonly coupled with biological models to estimate fish habitat quality, area, and capacity across a range of proposed streamflows. Increasingly, resource managers are relying on landscape‐scale model domains with coarse model resolutions to maintain feasible computational loads, but this may affect habitat estimates if the mesh element size of the model exceeds the spatial scale relevant to the organism. We investigated how coarsening the resolution of a 2DHM influences the area and spatial distribution of estimated Coho Salmon (Oncorhynchus kisutch) fry habitats. We used an interpolation scheme that upscaled mesh elements from a high‐resolution (0.25 m2) 2DHM to quantify and visualize the effects of 2DHM resolution on estimates of Coho Salmon fry habitat for two contrasting channel morphologies and across a broad range of streamflows. Estimates of Coho Salmon fry habitat at increasingly coarser resolutions led to 20%–50% reductions in weighted usable habitat area (WUA) across several streamflow scenarios for a complex channel type, but did not impact estimates in a confined, flume‐like channel. Additionally, flow‐to‐habitat area relationships were not congruent at a given streamflow when resolution coarsened. Along with almost 500% more high‐quality habitat area estimated in the complex channel type over the confined, discrepancies in habitat area increased with higher flows in areas defined as optimal for rearing Coho Salmon fry. Considering that complex channel types contain critical habitat for Coho Salmon fry, this study suggests coarse 2DHM resolutions may exclude important wetted edge and off‐channel habitats from environmental flow assessments.
{"title":"Effects of 2D hydrodynamic model resolution on habitat estimates for rearing Coho Salmon in contrasting channel forms","authors":"Reuben B. Smit, Damon H. Goodman, Josh Boyce, Nicholas A. Som","doi":"10.1002/rra.4341","DOIUrl":"https://doi.org/10.1002/rra.4341","url":null,"abstract":"Estimating the impacts of water allocation decisions on fish populations and habitat availability is an important part of environmental flow assessments, especially in locations where water resources are limited. Two‐dimensional hydrodynamic models (2DHMs) are commonly coupled with biological models to estimate fish habitat quality, area, and capacity across a range of proposed streamflows. Increasingly, resource managers are relying on landscape‐scale model domains with coarse model resolutions to maintain feasible computational loads, but this may affect habitat estimates if the mesh element size of the model exceeds the spatial scale relevant to the organism. We investigated how coarsening the resolution of a 2DHM influences the area and spatial distribution of estimated Coho Salmon (<jats:italic>Oncorhynchus kisutch</jats:italic>) fry habitats. We used an interpolation scheme that upscaled mesh elements from a high‐resolution (0.25 m<jats:sup>2</jats:sup>) 2DHM to quantify and visualize the effects of 2DHM resolution on estimates of Coho Salmon fry habitat for two contrasting channel morphologies and across a broad range of streamflows. Estimates of Coho Salmon fry habitat at increasingly coarser resolutions led to 20%–50% reductions in weighted usable habitat area (WUA) across several streamflow scenarios for a complex channel type, but did not impact estimates in a confined, flume‐like channel. Additionally, flow‐to‐habitat area relationships were not congruent at a given streamflow when resolution coarsened. Along with almost 500% more high‐quality habitat area estimated in the complex channel type over the confined, discrepancies in habitat area increased with higher flows in areas defined as optimal for rearing Coho Salmon fry. Considering that complex channel types contain critical habitat for Coho Salmon fry, this study suggests coarse 2DHM resolutions may exclude important wetted edge and off‐channel habitats from environmental flow assessments.","PeriodicalId":21513,"journal":{"name":"River Research and Applications","volume":"14 1","pages":""},"PeriodicalIF":2.2,"publicationDate":"2024-07-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141568225","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}
京公网安备 11010802042870号
京ICP备2023020795号-1
扫码关注我们
求助内容：
应助结果提醒方式：