样式: 排序: IF: - GO 导出 标记为已读
-
Reintroducing Atlantic salmon in the river Rhine for decades: Why did it not result in the return of a viable population? River Res. Appl. (IF 2.2) Pub Date : 2024-04-22 J. C. van Rijssel, A. W. Breukelaar, J. J. de Leeuw, M. E. B. van Puijenbroek, K. Schilder, A. Schrimpf, F. T. Vriese, H. V. Winter
Freshwater species biodiversity is under threat. The average global decline for migratory fish species is estimated to be more than 75% since 1970. Atlantic salmon is one of these species with a steep decline in north‐western Europe and it even went extinct in the river Rhine in the 1950s. The causes for this decline have been posted to habitat loss, pollution, climate change and overfishing. Annual
-
Vertical root profiles of grey alder (Alnus incana) trees growing in highly disturbed river environments River Res. Appl. (IF 2.2) Pub Date : 2024-04-22 Matteo Stamer, Angela M. Gurnell, Walter Bertoldi
The ability of plants to colonize the fluvial environment and withstand uprooting by floods is largely controlled by the anchoring effect of roots. We characterized the root architecture and tensile strength of Alnus incana, a riparian tree species of the Betulaceae family for which there are no systematic observations of its vertical root structure. Four A. incana individuals and two nearby Populus
-
Hydropeaking mitigation with re‐regulation reservoirs River Res. Appl. (IF 2.2) Pub Date : 2024-04-22 Ali Mchayk, Hannu Marttila, Björn Klöve, Ali Torabi Haghighi
The role of hydropower as a renewable and balancing power source is expected to increase in a Net Zero Emissions by 2050 scenario. As a common phenomenon in hydropower plants, hydropeaking will become more prominent, resulting in additional stresses on the ecological status of rivers. Here we propose a novel approach to design and operate auxiliary reservoirs called re‐regulation reservoirs (RRR) that
-
Dry, drier, driest: Differentiating flow patterns across a gradient of intermittency River Res. Appl. (IF 2.2) Pub Date : 2024-04-22 Benjamin T. Kelly, Lindsey A. Bruckerhoff
Intermittent streams exhibit regular patterns of drying and are widespread, but the patterns of drying among streams within geographic proximity are not fully understood. We compared annual patterns of flow and drying among 10 intermittent streams within a single drainage basin and assessed how traditional hydrologic metrics described variation between streams. We installed stream intermittency sensors
-
Full floodplain connectivity: Realising opportunities for ‘Stage 0’ river restoration River Res. Appl. (IF 2.2) Pub Date : 2024-04-16 Stewart J. Clarke
Continued declines in freshwater biodiversity and the challenges of climate change are creating greater interest in river restoration projects. Increasing recognition of the interaction between biological, geomorphological and hydrological processes has led to the development of ‘Stage 0’ river restoration. Stage 0 reaches are typically multi‐thread anabranching systems connected to the floodplain
-
Predicting nature recovery for river restoration planning and ecological assessment: A case study from England, 1991–2042 River Res. Appl. (IF 2.2) Pub Date : 2024-04-10 Martin A. Wilkes, Mansi Mungee, Marc Naura, Vicky A. Bell, Lee E. Brown
The Global Biodiversity Framework established ambitious goals for nature recovery which governments must now incorporate into national legislation. In England, legally binding targets require authorities to halt the decline in species abundance by 2030 and reverse the decline by 2042. Riverine invertebrates represent a substantial proportion of the species contributing towards the targets. Thus, understanding
-
Correction to “Short‐term effects on Unionid mussel density and distribution before and after low‐head dam removal in northern New York” River Res. Appl. (IF 2.2) Pub Date : 2024-04-11
Cooper, J. E. Short-term effects on Unionid mussel density and distribution before and after low-head dam removal in northern New York. River Research and Applications, 39(9), 1724–1735. The x-axis of Figure 3 should read from 0 to 100 (east shore to west shore). I apologize for this error.
-
Modelling flow regulation effects on vegetation recruitment and survival on alternate bars in channelized rivers River Res. Appl. (IF 2.2) Pub Date : 2024-04-09 Alyssa Serlet, Angela Gurnell, Guido Zolezzi
Many river reaches have transitioned to heavily vegetated systems following the regulation of their flow regime. Vegetation recruitment and survival are key to these transformations. We propose a novel predictive approach to detect how changes in the flow regime may affect conditions for successful vegetation recruitment and survival in channelized rivers with alternate bars. Our approach combines
-
Leveraging understandings of biogeomorphic river recovery to reframe river management philosophy and communication strategies River Res. Appl. (IF 2.2) Pub Date : 2024-04-08 Kirstie Fryirs
A philosophical and communication shift is needed in river management if we are to meet sustainable development goals and tackle environmental challenges brought about by ongoing anthropogenic and climate change. In some parts of the world, recovery‐enhancement approaches to river management have been adopted, communicated and used for many years. At the heart of these approaches lies an understanding
-
Broadscale and fine‐scale variables predict the occurrence of a stream‐breading bufonid: Habitat use by the Arizona toad (Anaxyrus microscaphus) River Res. Appl. (IF 2.2) Pub Date : 2024-04-05 Brett J. Montgomery, Heather L. Bateman, Fábio S. D. Albuquerque
Arizona toad (Anaxyrus microscaphus) is a stream‐breeding bufonid of conservation concern in Arizona, New Mexico, Utah, and Nevada. We determined the occupancy and habitat use of the Arizona toad throughout its range. We surveyed 500‐m reaches along perennial and intermittent streams during the summers of 2021 and 2022 (n = 232) in Arizona. We recorded the presence of all toad life stages, focusing
-
Plants and river morphodynamics: The emergence of fluvial biogeomorphology River Res. Appl. (IF 2.2) Pub Date : 2024-04-05 A. M. Gurnell, W. Bertoldi
In this article, we track the evolution of fluvial biogeomorphology from the middle of the 20th century to the present. We consider the emergence of fluvial biogeomorphology as an interdisciplinary research area that integrates knowledge drawn primarily from fluvial geomorphology and plant ecology, but with inputs from hydrology and landscape ecology. We start by assembling evidence for the emergence
-
Spring forth diversity: Specialist species contribute to the conservation value of headwater springs and streams at the landscape scale River Res. Appl. (IF 2.2) Pub Date : 2024-03-29 Jamal Kabir, Giulio Biondi, Kieran J. Gething, Thomas Aspin, Tim Sykes, Rachel Stubbington
Headwater springs and streams often occur in relatively remote areas, reducing their exposure to human influences and thus increasing their collective capacity to support high biodiversity. Their aquatic macroinvertebrate communities can include species of conservation interest, some of which are specialists associated with groundwater inputs, low water temperature or temporary flow. However, the inaccessibility
-
Characterizing the effects of morphological microstructures and hydropeaks on fish stranding in rivers River Res. Appl. (IF 2.2) Pub Date : 2024-04-01 Flora Insulaire, Nicolas Lamouroux, Agnès Barillier, Amael Paillex, Hervé Capra, Franck Cattaneo, Véronique Gouraud
Fish stranding in rivers, due to rapid shoreline dewatering, often occurs during the down‐ramping phase of hydropeaks, which enables peak energy production. Multiple hydropeaking characteristics and river morphology influence stranding, but little is known about the effects of riverbed microstructures. Our goal was to identify how the combination of hydropeaking characteristics and the occurrence of
-
Downstream migration of landlocked Atlantic salmon smolt in a regulated river—Effects of multiple passage at dams with programmed spill River Res. Appl. (IF 2.2) Pub Date : 2024-03-31 Johnny R. Norrgård, Daniel Nyqvist, Larry Greenberg, Eva Bergman
In many rivers, downstream‐migrating salmonid smolts must pass multiple dams often with high losses as a result. Fish experience mortality both in dam and reservoir passage, and spilling water might allow fish to avoid turbine passage and hence increase migration survival. In River Klarälven, Sweden landlocked Atlantic salmon smolts migrate along a 180 km long reach passing eight dams. A previous telemetry
-
Lake survival of hatchery‐reared adfluvial brown trout—A case study in a large natural lake in Sweden River Res. Appl. (IF 2.2) Pub Date : 2024-03-31 Daniel Palm, Petter Lundberg, Lo Persson, James Losee, Tomas Brodin, Gustav Hellström
Throughout their native range, adfluvial brown trout populations have declined due to habitat degradation and over exploitation. As a consequence, numerous restoration projects that include stocking of hatchery‐reared trout have been conducted; however, estimates of survival in large lakes remain scarce. Here, we use telemetry to evaluate the survival of stocked trout smolts and sub‐adults in a large
-
Bank erosion and erosion processes from dendrogeomorphology in southern U.S. prairie streams River Res. Appl. (IF 2.2) Pub Date : 2024-03-30 Joseph D. White, Peter M. Allen, Stephen G. Norair, Samuel T. Barber, John Dunbar, Jungang Gao
Streambank erosion processes influence the amount of soil material contributed to rivers and sedimentation rates in receiving reservoirs. However, the amount of data on bank erosion rates is limited both in range and extent affecting planning for mitigation and watershed management. Dendrogeomorphology is used to determine the date of wood anatomy changes in annual growth increments of roots exposed
-
Fish assemblage structure and habitat relationships of a large floodplain river in western North America River Res. Appl. (IF 2.2) Pub Date : 2024-03-26 Joshua Everett Williams, Stan Gregory, Randall Wildman
Understanding complex river floodplains is critical to conserve species of fish and their ecological functions. In 2011 through 2013, longitudinal gradients in fish assemblage were investigated in the Willamette River in western United States. Of 36,586 individual fish collected, 93% were native and 7% non‐native. The best predictors of fishes collected with a boat electrofisher were percent embeddedness
-
Temporal variation of braided intensity and morphodynamic changes in a regulated braided river using 2D modeling and satellite images River Res. Appl. (IF 2.2) Pub Date : 2024-03-20 Behnam Balouchi, Nils Rüther, Kordula Schwarzwälder
The river morphology of a braided‐type river is rather complex. High sediment transport rates and frequently changing discharges are the cause of dynamic planform evolution. Over the past few decades, scientific attention has been directed toward understanding the coexistence of alternating bars and the consequent emergence of confluences and divergences, all of which interact intricately with the
-
Biogeomorphological response to river restoration of a suburban river with large wood: Creating a restoration vision and cost‐effectively monitoring the response trajectory using the citizen science MoRPh survey River Res. Appl. (IF 2.2) Pub Date : 2024-03-18 Lucy Shuker, Angela Gurnell, Toby Hull
Biogeomorphological responses to river restoration are rarely reported. Despite a transition in the emphasis and priorities of river management over the last 40 years from controlling river channel forms and processes to restoring and supporting natural processes, forms and functions, remarkably little information is available on project outcomes. Here, using the example of Beverley Brook within Wimbledon
-
Analyzing natural bed‐level dynamics to mitigate the morphological impact of river interventions River Res. Appl. (IF 2.2) Pub Date : 2024-03-16 R. Pepijn van Denderen, Ralph M. J. Schielen, Andries J. Paarlberg, Michiel Reneerkens, Denie C. M. Augustijn
Local river interventions, such as channel narrowing or side channels, are often necessary to maintain safety, ecology, or navigation. Such interventions have different effects on the river's bed morphology during periods of high‐ and low‐discharge events. Mapping the bed‐level variations for different discharge levels and understanding these effects can provide new opportunities for the design of
-
Development of innovative groynes to establish fish passability of regulated rivers based on the example of the Wien River, Austria. Part I: Impact of groyne parameters on water depth and velocity River Res. Appl. (IF 2.2) Pub Date : 2024-03-15 Nora Lasinger, Elena Leutgöb, Helmut Habersack, Christine Sindelar
Rivers in Europe have been heavily modified over the last 200 years, with a significant impact on their ecology and environment. This also applies to rivers like the Wien River, Austria, which are designed as overwide concrete channels for the benefit of flood protection. To achieve a good ecological potential in such heavily modified water bodies, one key element is fish passability. This requires
-
Biogeomorphological floodplain dynamics along a degradation gradient of an Alpine river River Res. Appl. (IF 2.2) Pub Date : 2024-03-11 Thomas C. Wagner, Romy Woellner, Veronika Kloska, Johannes Kollmann
Channel migration, furcation, and vegetation succession are characteristic processes of braided gravel rivers in Alpine regions. These are associated with a frequent turnover of large parts of the active floodplain. However, more than one century of river regulation has reduced or destroyed most of these ecosystem dynamics. More recently, there have been attempts to restore at least some sections of
-
Environmental DNA time series analysis of a temperate stream reveals distinct seasonal community and functional shifts River Res. Appl. (IF 2.2) Pub Date : 2024-03-09 Mandy Sander, Arne J. Beermann, Dominik Buchner, Iris Madge Pimentel, James S. Sinclair, Martina Weiss, Peter Haase, Florian Leese
Environmental DNA (eDNA) extracted from water is routinely used in river biodiversity research, and via metabarcoding eDNA can provide comprehensive taxa lists with little effort and cost. However, eDNA‐based species detection in streams and rivers may be influenced by sampling season and other key factors such as water temperature and discharge. Research linking these factors and also informing on
-
Applying parentage methods to detect gravel augmentation effects on juvenile Chinook Salmon recruitment rates River Res. Appl. (IF 2.2) Pub Date : 2024-03-06 Scott M. Blankenship, Avery Scherer, Cheryl Dean, Kirsten Sellheim, Jamie Sweeney, Joseph Merz
Quantifiable measurement of habitat restoration effects on salmonid reproductive performance is limited, although it is necessary for evaluating whether population responses follow management actions. We investigated using close‐kin mark‐recapture methods to partition restoration effects within standard monitoring metrics of juvenile emigrants leaving the natal reach. This approach allowed for statistical
-
-
Evaluating the context dependency of large river nursery habitats for fishes in the lower Red River catchment River Res. Appl. (IF 2.2) Pub Date : 2024-03-05 Paul Q. Ramsey, John Dattilo, Dennis R. DeVries, Shannon K. Brewer
Both fine‐ and coarse‐scale physicochemical conditions affect the quantity and quality of nursery habitats within riverine ecosystems. Nursery habitats in large, braided, and sandbed streams such as the lower Red River of Oklahoma, Texas, and Arkansas are not well described and likely vary among species. Identification of nursery habitats is important for developing proper conservation and management
-
Juvenile salmonid abundance in a diamictic semi-fluvial stream in Norway—does stream bed shelter beat large woody debris? River Res. Appl. (IF 2.2) Pub Date : 2024-02-29 Joachim B. Bretzel, Ulrich Pulg, Juergen Geist
This study investigates the effect of large woody debris (LWD) on the abundance of juvenile Atlantic salmon (Salmo salar, L.) and anadromous brown trout (Salmo trutta, L.) in semi-alluvial side channels of the river Aurlandselva (Norway) using point electrofishing and microhabitat mapping. Not the presence of LWD, but stream bed shelter availability and the distance to spawning grounds affected the
-
Historical and contemporary drivers of knickpoint retreat and morphological evolution along Bayou Pierre, Mississippi River Res. Appl. (IF 2.2) Pub Date : 2024-02-28 Loren W. Stearman, Franklin T. Heitmuller
Channel incision in rivers can cause marked ecological and economic damages. This phenomenon is abundant and generally well documented along impacted streams in the loess hills adjacent to the Lower Mississippi River valley. Bayou Pierre, an ecologically important small tributary of the Mississippi River, is currently incising but causes are not well understood. In this study, we examine diverse data
-
A novel Joint Probability Density Difference Approach for assessing the alteration of hydrologic regime River Res. Appl. (IF 2.2) Pub Date : 2024-02-28 Sirui Zhong, Shenglian Guo, Yun Wang, Heyu Wang, Yuzuo Xie, Chong‐Yu Xu
The construction and operation of upstream reservoirs have significantly altered downstream hydrologic regime. Appropriate and quantifiable assessment method for the alteration of hydrologic regime is considerably vital and emergent for ecological protection and restoration. The Range of Variability Approach (RVA) and modified RVA methods have been widely used in practice to assess the hydrological
-
A new braiding index to assess river regulation effects in multi-thread channels: Insights from a highly regulated Himalayan river River Res. Appl. (IF 2.2) Pub Date : 2024-02-22 Kausik Ghosh, Tapan Chakraborty, Priyank Pravin Patel
River regulation by dams and embankments drastically reduce/alter flow, which affects the natural channel pattern. Existing braiding indices have seldom incorporated the effects of diurnal flow variations caused by hydropeaking, leading to over/underestimation of the braiding intensity. These indices consider only the visible wet channels, ignoring the existence of dry channels that are activated only
-
Evaluation of alternative approaches to PHABSIM modeling of coastal cutthroat trout spawning habitat River Res. Appl. (IF 2.2) Pub Date : 2024-02-17 Hal A. Beecher, Steven N. Boessow, Kiza K. Gates, James P. Losee, Riley Freeman, Gabriel M. Madel
In the face of a changing climate and increasing human demand for water, an understanding of habitat preference has become critical for managing wild fish populations and projecting potential changes in habitat and populations. Two approaches to Physical Habitat Simulation (PHABSIM) modeling of coastal cutthroat trout Oncorhynchus clarkii clarkii spawning habitat were compared by modeling a reach,
-
Assessing entrainment of larval fish in the Hogback Diversion Canal, San Juan River River Res. Appl. (IF 2.2) Pub Date : 2024-02-19 Stephani L. Clark Barkalow, Robert K. Dudley, Steven P. Platania, W. Howard Brandenburg, Mark C. McKinstry, Gary C. White
Water diversions worldwide may entrain or impinge fish and have population‐level impacts, but barriers like fish screens can reduce such threats. Traditional barriers are ineffective in the San Juan River, USA, due to high sediment and debris loads, so the Hogback Diversion Canal, NM, employs a novel weir wall design to reduce entrainment of sub‐adult and adult fishes. We evaluated the effectiveness
-
Remotely sensed land‐cover change and floodplain disturbance following upstream‐migrating river avulsions in tropical rainforests River Res. Appl. (IF 2.2) Pub Date : 2024-02-19 Riley T. Henson, Douglas A. Edmonds, Eli D. Lazarus
The displacement of a river to a new position within its adjacent floodplain is called avulsion, and here we examine how a newly recognized style, called retrogradational avulsion, affects the surrounding floodplain in tropical rainforests using remote sensing. Retrogradational avulsions begin with a channel blockage that causes self‐propagating upstream dechannelization and flooding. While this flooding
-
Short-term effects of Storm Daniel on Salmo farioides (Karaman, 1938) in a high-gradient stream River Res. Appl. (IF 2.2) Pub Date : 2024-02-12 Leonidas Vardakas, Nicholas Koutsikos, Elias Dimitriou, Theocharis Vavalidis, Petros Kouraklis, Eleni Kalogianni
Climate change is expected to increase the magnitude, frequency, and intensity of extreme natural phenomena such as droughts and floods. These events can have devastating impacts on aquatic biota, thus there is a dire need to assess species' natural dynamics and to incorporate them into species' conservation actions and flood management decisions. In September 2023, an extreme meteorological event
-
Collateral benefits: River flow normalization for endangered fish enabled riparian rejuvenation River Res. Appl. (IF 2.2) Pub Date : 2024-02-09 Stewart B. Rood, Gregory C. Hoffman, Norm Merz, Paul Anders, Rohan Benjankar, Michael Burke, Gregory Egger, Mary Louise Polzin, Scott Soults
Like most rivers worldwide, the transboundary North American Kootenay/i River has experienced multiple impacts including watershed developments, river channelization, and floodplain clearing, draining, and diking. Construction of Libby Dam was authorized by the 1964 Columbia River Treaty (CRT) between the United States and Canada, and in 1975 began regulating downstream flows for flood risk management
-
Onset of climate-change impact on the renowned Oncorhynchus metapopulation of Yellowstone Lake revealed by Leslie modeling of annual gill-net catches River Res. Appl. (IF 2.2) Pub Date : 2024-02-08 Lynn R. Kaeding
The native Yellowstone cutthroat trout (Oncorhynchus clarkii bouvieri; YCT) of Yellowstone Lake, Yellowstone National Park, Wyoming, USA, comprise a metapopulation that inhabits an ecologically simple and uniquely pristine environment. A recent study Bayesian fit an age-structured Leslie model that had a local climate index (total annual mean-daily air temperatures >0°C at the lake's north shore) as
-
The sedimentology of gravel beds in groundwater-dominated chalk streams: Implications for sediment modelling and management River Res. Appl. (IF 2.2) Pub Date : 2024-02-08 Beth Mondon, David A. Sear, Adrian L. Collins, Peter J. Shaw, Tim Sykes
Elevated fine sediment accumulation in a river system's gravel bed is known to cause detrimental ecological impacts. Current sediment targets and approaches to mitigation have failed due to the oversimplification of geomorphological processes controlling fine sediment accumulation and the lack of relevant scientific knowledge underpinning them. This is particularly apparent in chalk streams (groundwater-dominated
-
Performance and accuracy of cross-section tracking methods for hydromorphological habitat assessment in wadable rivers with sparse canopy conditions River Res. Appl. (IF 2.2) Pub Date : 2024-02-07 Robin Schroff, Giovanni De Cesare, Paolo Perona
This article investigates the performance and accuracy of continuous Real-Time Kinematic (RTK) Global Navigation Satellite System (GNSS) position tracking for hydromorphological surveys, based on a comprehensive river restoration monitoring campaign. The aim of the research was to assess the method's suitability for efficient data collection in turbid, wadable rivers with sparse canopy conditions,
-
Upstream experience and experimental translocation of invasive bigheaded carps results in increased upstream passage success at a navigation lock in a large river River Res. Appl. (IF 2.2) Pub Date : 2024-02-06 Andrea K. Fritts, Daniel K. Gibson-Reinemer, Brent C. Knights, Amanda S. Milde, Jessica C. Stanton, Marybeth K. Brey, Douglas S. Appel, Aaron R. Cupp, Sara J. Tripp, James T. Lamer, Mark W. Fritts
Fish movements in regulated rivers can be challenging to study because anthropogenic modifications, such as locks and dams, can influence animal behavior. Upper Mississippi River Lock and Dam 19 (LD 19), for example, is an invasive carp movement bottleneck due to an impassable dam. Upstream fish passage at LD19 is restricted to the lock chamber, making it an optimal location to test invasive fish deterrents
-
Land cover, stream discharge, and wastewater effluent impacts on baseflow sediment and nutrient concentrations in SW Ohio streams River Res. Appl. (IF 2.2) Pub Date : 2024-02-04 Rachel E. Spahr, Jeffrey A. Lazar, Bartosz P. Grudzinski, Thomas J. Fisher
Elevated nutrient and suspended sediment concentrations often result in negative environmental impacts within freshwater environments. Studies that directly compare suspended sediment and bioavailable nutrients between predominantly agricultural and predominantly urban watersheds during baseflow conditions are largely lacking. The purpose of this study was to determine the impacts of land cover, stream
-
Recent changes in riparian and floodplain vegetation in England and Wales and its geomorphic implications River Res. Appl. (IF 2.2) Pub Date : 2024-02-01 Martin Dawson, Angela Gurnell, John Lewin, Mark G. Macklin
Recent river studies in the United Kingdom have observed an increase in riparian vegetation and its potential impact on river channel change and sedimentation. Here, we quantify changes in floodplain and riparian vegetation during the first two decades of the 21st century along reaches of eight gravel-bed rivers in England and Wales that exhibit varied active and stable, single and multi-thread planforms
-
Study on the mechanism of the diversion of flow and sediment in the complex Estuarine River network River Res. Appl. (IF 2.2) Pub Date : 2024-01-30 Haoyan Dong, Zixiao He, Liangwen Jia
The anomalous variation in the diversion of flow and sediment at the major bifurcation nodes of the Pearl River network in recent years has been generally recognised and accepted, yet the underlying mechanisms have not been revealed. In this study, a large-scale two-dimensional flow-sediment numerical model of the Pearl River estuary was constructed using the TELEMAC-MASCARET modelling system. Additionally
-
Study on purification effect of river ammonia nitrogen and optimization of layout parameters in the combination of ecological spur dikes and deep pool shoals: Experiments and MIKE21 River Res. Appl. (IF 2.2) Pub Date : 2024-01-30 Qihang Wang, Songmin Li, Xiaoling Wang, Yitian Chen, Yazhi Zheng, Guangyao Dong
The construction of ecological spur dikes and deep pool shoals can increase the diversity of water flow structures while also hastening the transport and transformation of pollutants. However, current research has paid little attention to the effects of the arrangement parameters on water purification capacity when the ecological spur dikes and deep pool shoals are combined. In this study, we investigated
-
Turbulent structural analysis of the combined fishway with vertical seam and bottom hole River Res. Appl. (IF 2.2) Pub Date : 2024-01-29 Chun-ying Shen, Yu-bin Chen, Xiao-tao Shi, Ming-ming Wang, Shi-hua He
The three-dimensional flow velocities within the typical pool chamber of the rectangular fishway were measured in a vertical slit bottom-hole combination fishway by a hydraulic model test using an acoustic Doppler velocimeter (ADV). This was aimed to analyze the effect of eddy structures within the pool chamber of the fishway on fish migration. Based on this, a numerical simulation study was conducted
-
Evaluating methods for measuring in-river bathymetry: Remote sensing green LIDAR provides high-resolution channel bed topography limited by water penetration capability River Res. Appl. (IF 2.2) Pub Date : 2024-01-26 Leif Kastdalen, Morten Stickler, Christian Malmquist, Jan Heggenes
The objective was to evaluate the feasibility of measuring bathymetry using airborne green LiDAR in long and variable river reaches (4 km or more), across three rivers with varying gradients, water depths and light penetration (3.5–10 m), using four alternative LiDAR sensors. The accuracy of green LiDAR data was compared to in situ measurements collected by stratified transect point sampling and Multibeam
-
Handheld lidar as a tool for characterizing wood-rich river corridors River Res. Appl. (IF 2.2) Pub Date : 2024-01-24 Anna Marshall, Ryan R. Morrison, Brady Jones, Shayla Triantafillou, Ellen Wohl
Wood accumulations influence geomorphic, hydraulic, and ecologic functions within a river corridor, but characterizing these accumulations presents challenges across a range of field and remote sensing methodologies. We evaluate the ability of handheld lidar scanners, specifically lidar-scanning capabilities of a fourth-generation iPad Pro, to collect three-dimensional wood accumulation data, which
-
A high-resolution inter-annual framework for exploring hydrological drivers of large wood dynamics River Res. Appl. (IF 2.2) Pub Date : 2024-01-22 Borbála Hortobágyi, Stéphane Petit, Baptiste Marteau, Gabriel Melun, Hervé Piégay
Rivers with alluvial bars store more wood than those without, supplied through channel shifting. However, wood dynamics (arrival or new deposits, departure or entrainment, and stable or immobile pieces) can vary substantially over time in response to critical hydrological drivers that are largely unknown. To evaluate them, we studied the dynamics of large wood pieces and logjams along a 12-km reach
-
Environmental impact assessment and conservation planning of a Middle-Eastern River basin using a fish-based tolerance index River Res. Appl. (IF 2.2) Pub Date : 2024-01-15 Mojgan Zare Shahraki, Pejman Fathi, Eisa Ebrahimi Dorche, Joseph Flotemersch, Karen Blocksom, James Stribling, Andreas Bruder
The tolerance of aquatic organisms to stressors is widely used to monitor and evaluate the condition of freshwater ecosystems. Tolerance values (TV) derived from analyses of the relationship between species and their environment are considered to be more objective than those that rely on expert opinion. We used principal component analysis (PCA) to derive a generalized stressor gradient based on physicochemical
-
A model for quantifying the effectiveness of leaky barriers as a flood mitigation intervention in an agricultural landscape River Res. Appl. (IF 2.2) Pub Date : 2024-01-13 Martha L. Villamizar, Chris Stoate, Jeremy Biggs, John Szczur, Penny Williams, Colin D. Brown
Leaky barriers have become an important mitigation option within natural flood management to reduce downstream flood risk. Modelling is a key tool to aid in the design of leaky barrier installations for flood mitigation, but there is limited evidence about the accuracy of model representations of the system. Here, the hydrological model SWAT was combined with a water routing model that simulates multiple
-
Disregard of aquatic shrews in the Environmental Impact Assessment reports regarding hydropower dams in the Nepal Himalayas River Res. Appl. (IF 2.2) Pub Date : 2024-01-11 Sagar Dahal, Kaustuv Raj Neupane, Bashu Dev Baral, Simon Poulton
The rate of hydropower dam construction on rivers is increasing in emerging economies in South Asia, to achieve economic development goals. These large infrastructure projects are likely to have many negative consequences on freshwater species but have not yet received much consideration. Among freshwater small mammalian species, water shrews are seriously impacted by these large structures. This paper
-
Water quality shapes the community structure of zoobenthos in rivers but only has a minor effect on the fatty acid composition of zoobenthos and salmonids River Res. Appl. (IF 2.2) Pub Date : 2024-01-07 Petri Kesti, Ursula Strandberg, Sami Taipale, Minna Hiltunen, Jussi Vesterinen, Anssi Vainikka, Paula Kankaala
Many river ecosystems in the boreal zone have faced remarkable changes due to intensive human activities, including land-use changes in the catchments and channelization. Recently, restoration efforts have increased, hoping to restore a more natural hydromorphology. We studied the community structure of benthic macroinvertebrates (zoobenthos) in seven rivers in Eastern Finland, using samples that covered
-
Spatial patterns in occupancy and density of larval lampreys in freshwater habitats restored to a Stage 0 condition River Res. Appl. (IF 2.2) Pub Date : 2024-01-04 Julianne E. Harris, Benjamin J. Clemens, Joseph M. Helstab, Paul Burns, Monica R. Blanchard, Joseph J. Skalicky, Christopher Mayes, Logan Bodiford
We examined occupancy and density of larval lampreys (Entosphenus tridentatus and Lampetra spp.) in two rivers in Oregon (USA) restored to a Stage 0 condition 1–5 years prior, using a multiscale occupancy model and a zero-inflated Poisson mixture model. We sampled lampreys using backpack electrofishing in randomly distributed, paired, 1-m2 quadrats and recorded environmental data. Probabilities of
-
Geomorphic context in process-based river restoration River Res. Appl. (IF 2.2) Pub Date : 2024-01-02 Ellen Wohl, Sara Rathburn, Sarah Dunn, Emily Iskin, Aaron Katz, Anna Marshall, Mickey Means-Brous, Julianne Scamardo, Shayla Triantafillou, Hiromi Uno
Process-based river restoration seeks to restore processes such as channel-floodplain connectivity that create and maintain river corridor functions. Process-based restoration can fail to produce the desired results if geomorphic context is not effectively incorporated into restoration design. Geomorphic context of a river reach refers to the controls on contemporary river form and process. Controls
-
River regulation effects on zooplankton community assembly: Implications for arid river restoration and conservation River Res. Appl. (IF 2.2) Pub Date : 2023-12-25 Jiahui Li, Qiqi Liang, Hang Wang, Carmen G. Montaña, Zhongsuo Wang
River flow reduction and biodegradation are increasingly threatening ecological processes and the health of rivers. Water replenishment is frequently applied to drought-stricken rivers to conserve biodiversity and restore ecosystems. To evaluate and improve the effects of different water supply regimes on aquatic environments and organisms, we investigated the species composition and community structure
-
Challenges in measuring fine sediment ingress in gravel-bed rivers using retrievable sediment trap samplers River Res. Appl. (IF 2.2) Pub Date : 2023-12-25 R. Maltauro, M. Stone, A. L. Collins, B. G. Krishnappan
“Excess” interstitial fine sediment (<2 mm) is known to cause deleterious impacts on streambed ecosystems. Current methodologies available to assess ingress and its vertical and horizontal components still lack standardization, and the accuracy of commonly used assessments is still debatable. Here, we evaluate three fine sediment trap designs that measure only vertical (V), only horizontal (H), and
-
Evaluating the performance of instream structures for a stream restoration project in Colorado River Res. Appl. (IF 2.2) Pub Date : 2023-12-25 Eric E. Richer, Sam Graf, Matt C. Kondratieff
Metals pollution and channel disturbance associated with historical mining, land use, and water development degraded aquatic and riparian habitat along the upper Arkansas River near Leadville, Colorado. Stream restoration was conducted for an 8 km reach to improve aquatic habitat and increase trout populations. Instream structures were prescribed to stabilize streambanks, create diverse stream morphology
-
Spatial variation characteristics and influencing factors of CO2 partial pressure in the middle reaches of the Yellow River during summer River Res. Appl. (IF 2.2) Pub Date : 2023-12-20 XiaoGe Dang, MinQuan Feng, HaiXiao Jing, YiBo Wang, Cheng Dong
The partial pressure of CO2 in rivers regulates the intensity and direction of carbon dioxide (CO2) exchange at the water–air interface. Environmental, nutrient factors, and their stoichiometric ratios within the watershed may affect the level of carbon dioxide partial pressure in rivers. However, the relationship between pCO2 responses to the environment, nutrient factors, and their stoichiometric
-
Quantitative delineation of water sources in the river Ganga using stable water isotopes River Res. Appl. (IF 2.2) Pub Date : 2023-12-12 Anurag Kumar, Sayak Basu, Ajay Ajay, Deepak Kumar Jha, Prasanta Sanyal
Quantitative delineation of water sources in a large river system is essential for the sustainable use of water. In the present study, we have tested two different methodologies to estimate the contribution from different water sources in the river Ganga. The first model uses stable isotopes and physicochemical parameters of water to delineate the contribution of glacier-melt, groundwater, and surface
-
Ecological traits of Saliceae and the species replacing them on the active floodplain River Res. Appl. (IF 2.2) Pub Date : 2023-12-07 Peter J. Edwards
The dominant woody plants of active floodplains in the northern temperate zone are various species of Salix (willows) and Populus (poplars and cottonwoods) in the tribe Saliceae of the family Salicaceae. In this review, I consider the traits that enable these species to thrive in the dynamic floodplain environment and ask why they are now declining in the northern hemisphere, yet spreading rapidly
-
Expansion of smallmouth bass distribution and habitat overlap with juvenile Chinook salmon in the Willamette River, Oregon River Res. Appl. (IF 2.2) Pub Date : 2023-11-30 James S. White, Tobias J. Kock, Brooke E. Penaluna, Stan Gregory, Josh Williams, Randy Wildman
Smallmouth bass populations have expanded far beyond their native range and these predatory fish present a pervasive threat to native aquatic species throughout North America. In the western United States, smallmouth bass are now present in river and reservoir habitats where Pacific salmon are found and are considered a potential threat to salmon recovery in many locations. We conducted a study to