River Research and Applications最新文献_第4页

Anchor chains—A simple low‐cost device to assist passage of small‐bodied mass fish 锚链--帮助小体型鱼类通过的低成本简易装置

IF 1.7 4区环境科学与生态学

River Research and Applications Pub Date : 2024-07-15 DOI: 10.1002/rra.4347

Jason Harley, Hui Ling Wong, H. Chanson

{"title":"Anchor chains—A simple low‐cost device to assist passage of small‐bodied mass fish","authors":"Jason Harley, Hui Ling Wong, H. Chanson","doi":"10.1002/rra.4347","DOIUrl":"https://doi.org/10.1002/rra.4347","url":null,"abstract":"Attention has been placed on a variety of barriers that hinder fish passage in modern times. The most prevalent fish barriers were culverts which have negatively impacted waterway connectivity and fish habitats. For small‐bodied mass fish, high barrel velocities and turbulence have reduced fish swimming performance because of their weak swimming capabilities. In the present study, physical testing was conducted under controlled flow conditions to assess the extent and magnitude of turbulence characteristics, secondary flow and low‐velocity zones in a 0.5‐m‐wide box culvert barrel. Two cases were investigated; a reference case consisting of a smooth rectangular channel and a low‐cost design solution to improve upstream fish migration consisting of a single galvanized anchor chain fitted within a smooth rectangular channel. The single anchor chain was positioned towards one corner of the channel to induce asymmetric flow, reducing overall energy losses and enhancing the existing low‐velocity zone in the adjacent channel corner. The anchor chain induced a strong turbulent flow motion away from the anchor chain, characterized by higher Reynolds stress and turbulent kinetic energy, along with a distinct channel flow asymmetry. Conversely, the low‐velocity zone, between the anchor chain and the bottom channel corner, was significantly expanded with reduced longitudinal mean velocities and turbulent scales. Whilst the anchor chain link contributed to some complex localized wake flow, the anchor chain also influenced the distributions of normal turbulent stresses (v'z2 – v'y2), which in turn influenced the location of secondary flow cells. This secondary flow redirected low momentum fluid into the low‐velocity zones, setting the conditions for the favorable upstream passage of small‐bodied mass fish species.","PeriodicalId":21513,"journal":{"name":"River Research and Applications","volume":null,"pages":null},"PeriodicalIF":1.7,"publicationDate":"2024-07-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141646095","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

The morphological and functional traits of water bodies enhance the explanatory power of directed spatial processes in predicting the variation of macrophyte communities under the conditions of river flow regulation 水体的形态和功能特征增强了定向空间过程在预测河流流量调节条件下大型植物群落变化方面的解释力

IF 1.7 4区环境科学与生态学

River Research and Applications Pub Date : 2024-07-14 DOI: 10.1002/rra.4346

Olena Lisovets, V. Ruchiy, Olga Kunakh, O. Zhukov

{"title":"The morphological and functional traits of water bodies enhance the explanatory power of directed spatial processes in predicting the variation of macrophyte communities under the conditions of river flow regulation","authors":"Olena Lisovets, V. Ruchiy, Olga Kunakh, O. Zhukov","doi":"10.1002/rra.4346","DOIUrl":"https://doi.org/10.1002/rra.4346","url":null,"abstract":"The study evaluated the influence of aquatic environmental features, morphological and functional traits of water bodies and directional spatial processes on the macrophyte community of floodplain ecosystems formed as a result of water flow regulation by the construction of dams. The fluvial processes were found to be still the main factor in the formation of geomorphological and ecological characteristics of floodplain ecosystems, and also determine the spatial patterns of variability of aquatic macrophyte communities. The influence of water properties on macrophytes is significantly spatially structured, as it is modified by the morphological and functional characteristics of the water bodies. The exchange of water in the floodplain system is influenced by the functional types of water bodies, which explains their significant correlation with spatial variables. The development of macrophyte communities on a broad scale is driven by the characteristics of the aquatic environment, the morphology of the water bodies and the functional types of the water bodies. On a fine scale, the patterns are described by a pure spatial component. The impact of fine scale patterns on the variability of macrophyte communities increases with increasing community disturbance, both natural and anthropogenic.","PeriodicalId":21513,"journal":{"name":"River Research and Applications","volume":null,"pages":null},"PeriodicalIF":1.7,"publicationDate":"2024-07-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141650523","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

Special issue: Fluvial biogeomorphology 特刊：冲积生物地貌学

IF 2.2 4区环境科学与生态学

River Research and Applications Pub Date : 2024-07-10 DOI: 10.1002/rra.4330

Angela Gurnell, Walter Bertoldi, Robert A. Francis, Geraldene Wharton

引用次数: 0

Featured Cover 精选封面

IF 2.2 4区环境科学与生态学

River Research and Applications Pub Date : 2024-07-10 DOI: 10.1002/rra.4342

A. M. Gurnell, W. Bertoldi

引用次数: 0

Celebrating the career of Angela Gurnell 庆祝安吉拉-古内尔的职业生涯

IF 2.2 4区环境科学与生态学

River Research and Applications Pub Date : 2024-07-10 DOI: 10.1002/rra.4328

G. Wharton, W. Bertoldi, R. A. Francis

引用次数: 0

Effects of 2D hydrodynamic model resolution on habitat estimates for rearing Coho Salmon in contrasting channel forms 二维水动力模型分辨率对不同河道形式下驯养科霍鲑栖息地估计值的影响

IF 2.2 4区环境科学与生态学

River Research and Applications Pub Date : 2024-07-08 DOI: 10.1002/rra.4341

Reuben B. Smit, Damon H. Goodman, Josh Boyce, Nicholas A. Som

{"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 (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.","PeriodicalId":21513,"journal":{"name":"River Research and Applications","volume":null,"pages":null},"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}

引用次数: 0

Bias and variation in salmonid redd counting using remotely piloted vehicles 使用遥控飞行器进行鲑鱼红点计数的偏差和变化

IF 2.2 4区环境科学与生态学

River Research and Applications Pub Date : 2024-07-08 DOI: 10.1002/rra.4343

Daniel S. Auerbach, Alexander K. Fremier

{"title":"Bias and variation in salmonid redd counting using remotely piloted vehicles","authors":"Daniel S. Auerbach, Alexander K. Fremier","doi":"10.1002/rra.4343","DOIUrl":"https://doi.org/10.1002/rra.4343","url":null,"abstract":"Redd surveys estimate spawning population size for many salmonid species. Studies of field‐based redd counting methods highlight observer bias caused by redd density, observer experience, and environmental factors. Researchers have begun using remotely piloted vehicles (RPVs, drones) to count redds; yet, no studies have quantified bias and variability in counts. This study aimed to quantify the influence of redd density, observer experience, and environmental factors (namely, water clarity) on redd counting bias and variability when using RPVs. We found that technological and procedural improvements from our previous study increased precision and reduced variability among observers (coefficient of variation, сυ = 11% compared to сυ = 42%). Redd density was the leading covariate causing differences between RPV and both “best counts” (p < 0.05) and field counts (p < 0.05). We found a reduction in variability with experience level (no experience сυ = 78%; semi‐experienced сυ = 33%; experienced сυ = 20%), with no directional bias in counting. Our paper is the first to quantify observer bias in RPV‐based redd counts. This study describes RPV methods and can help agencies decide how to use RPVs in redd counting and incorporate RPV methods into long‐term datasets.","PeriodicalId":21513,"journal":{"name":"River Research and Applications","volume":null,"pages":null},"PeriodicalIF":2.2,"publicationDate":"2024-07-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141568226","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

Wood you believe it? Experimental addition of nonnative wood enhances instream habitat for native dryland fishes 木头你相信吗？试验性添加非本地木材可改善本地旱地鱼类的河内栖息地

IF 2.2 4区环境科学与生态学

River Research and Applications Pub Date : 2024-07-05 DOI: 10.1002/rra.4334

Benjamin J. Miller, Mark C. McKinstry, Phaedra Budy, Casey A. Pennock

{"title":"Wood you believe it? Experimental addition of nonnative wood enhances instream habitat for native dryland fishes","authors":"Benjamin J. Miller, Mark C. McKinstry, Phaedra Budy, Casey A. Pennock","doi":"10.1002/rra.4334","DOIUrl":"https://doi.org/10.1002/rra.4334","url":null,"abstract":"Flow alteration and riparian vegetation encroachment are causing habitat simplification with severe consequences for native fishes. To assess the effectiveness of enhancing simplified habitat in a large dryland river, we experimentally added invasive wood at 19 paired treatment and reference (no wood added) subreaches (50–100 m) within the main channel of the San Juan River. Using a before‐after‐control‐impact design, we sampled fishes and macroinvertebrates, and quantified habitat complexity. After wood addition, total native fish densities were 2.2× higher in treatments compared with references, whereas total nonnative fish densities exhibited no response. Macroinvertebrate densities were 6.8× higher, and habitat complexity increased in treatments. Counts of geomorphic features in treatments increased from 1 to a maximum of 11 following wood addition, while the number of features in references remained unchanged. Wood addition has potential to instigate natural riverine processes, ultimately enhancing native fish habitat by increasing macroinvertebrate densities and habitat complexity in dryland rivers. Water overallocation and increasing aridity will continue to challenge efforts to improve habitat conditions with environmental flows alone, and managers might consider integrating non‐flow alternatives like addition of abundant, invasive wood to reduce habitat simplification.","PeriodicalId":21513,"journal":{"name":"River Research and Applications","volume":null,"pages":null},"PeriodicalIF":2.2,"publicationDate":"2024-07-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141568227","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

Findings from a National Survey of Canadian perspectives on predicting river channel migration and river bank erosion 加拿大关于河道迁移和河岸侵蚀预测观点的全国调查结论

IF 2.2 4区环境科学与生态学

River Research and Applications Pub Date : 2024-07-03 DOI: 10.1002/rra.4336

C. Kupferschmidt, A. D. Binns

{"title":"Findings from a National Survey of Canadian perspectives on predicting river channel migration and river bank erosion","authors":"C. Kupferschmidt, A. D. Binns","doi":"10.1002/rra.4336","DOIUrl":"https://doi.org/10.1002/rra.4336","url":null,"abstract":"River bank erosion and river channel migration are geomorphic processes that can result in significant hazards when there are impacts to humans or infrastructure. Unlike flooding, there are limited national guidelines in Canada that provide recommendations on how to best assess riverine erosion hazards. Instead regional and local jurisdictions rely on techniques based on varying levels of policy maturity. The current study presents findings of a nationwide survey on Canadian perspectives on predicting river channel migration and river bank erosion which received more than 40 responses from across Canada. Results showed that predictions were used for a variety of purposes, but that confidence intervals were rarely reported. Aerial imagery and survey‐based methods were the well‐known and widely‐used techniques for predicting river channel migration and river bank erosion. A majority of respondents identified both technical and financial challenges to improving accuracy including client willingness to pay, data quality/cost issues, and hydrologic changes due to land use and climate change. Several recommendations for improving best‐practices are provided, with a focus on the development of erosion datasets, improving data access, and providing additional training opportunities.","PeriodicalId":21513,"journal":{"name":"River Research and Applications","volume":null,"pages":null},"PeriodicalIF":2.2,"publicationDate":"2024-07-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141551783","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

Fluvial habitat associations of riverine dragonflies (Odonata, Gomphidae) in the Huron Mountains (Michigan, USA) 休伦山脉（美国密歇根州）沿河蜻蜓（蜻蜓科）的河流栖息地关系

IF 2.2 4区环境科学与生态学

River Research and Applications Pub Date : 2024-07-03 DOI: 10.1002/rra.4339

Jessica M. Orlofske, Brandon R. Wilson, Danielle E. Tesar, Christopher D. Tyrrell, Rachel Headley

{"title":"Fluvial habitat associations of riverine dragonflies (Odonata, Gomphidae) in the Huron Mountains (Michigan, USA)","authors":"Jessica M. Orlofske, Brandon R. Wilson, Danielle E. Tesar, Christopher D. Tyrrell, Rachel Headley","doi":"10.1002/rra.4339","DOIUrl":"https://doi.org/10.1002/rra.4339","url":null,"abstract":"The presence of sediment‐burrowing clubtail dragonflies (Gomphidae) may be directly related to riverine geomorphic properties. Their synchronous emergence behavior, marked by persistent exuviae, allows for the examination of emerging adult‐stage habitats. Here we explore how emerging adult and benthic larvae are related to hydrogeomorphic factors through regression modeling. Nine sites in two subwatersheds of the Huron Mountain region (Michigan, USA) were surveyed during two periods: May/June 2021 and August 2021. Temperature, pH, dissolved oxygen, conductivity, and discharge were measured concurrent with invertebrate surveys, and field samples of total suspended solids, nutrients, and substrate particle size distribution were also taken. In spring, 317 exuviae were collected, including 153 Gomphidae. In August, 45 larvae were collected including 22 Gomphidae. Spearman's rank correlations preceded robust regression analysis to aid variable selection. Although nonsignificant, Gomphidae exuviae were negatively correlated with conductivity, average water depth, and percent sand while non‐Gomphidae exuviae were positively correlated with the same variables. The model selection found the top models for Gomphidae and non‐Gomphidae exuviae abundance to relate to depth and conductivity, while the top model for Gomphidae larvae was with discharge. All single variable models (discharge, width, and percent sand) had similar AICc criterion values when examining their relationship with non‐Gomphidae larval abundance. Our study demonstrates that larvae of several riverine dragonfly taxa in the Huron Mountains co‐occur despite hydrogeomorphic variation, yet, at emergence, specific taxa may be responding to different stream properties. Understanding the habitat requirements of riverine dragonflies and how these potentially shift throughout development can support conservation efforts.","PeriodicalId":21513,"journal":{"name":"River Research and Applications","volume":null,"pages":null},"PeriodicalIF":2.2,"publicationDate":"2024-07-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141551779","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