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Contributions of suspended load from Missouri River tributaries, southeast South Dakota, and northeast Nebraska: Building a sediment budget River Res. Appl. (IF 1.916) Pub Date : 2021-01-11 Marcella Jurotich; Nathan Cardona; Bethany Vázquez; Ruthie Wetzel; Tim Cowman; Mark Sweeney
Suspended sediment plays a critical role in riverine ecosystem health and river processes and is respondent to human alterations such as dams and increased land use. Gavins Point Dam, located on the Missouri River near Yankton, South Dakota, restricts upstream suspended load; yet, suspended sediment concentrations (SSC) increase when the river reaches Sioux City, Iowa. We determined the suspended load
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Loading of stream wood following the 2016 Chimney Tops 2 Wildfire: Great Smoky Mountains National Park, Tennessee, USA River Res. Appl. (IF 1.916) Pub Date : 2021-01-03 Sarah Praskievicz; Rajesh Sigdel
Large wood drives physical and ecological processes in river systems, but the relative roles of continuous individual tree mortality versus episodes of mass mortality in wood recruitment are not well understood. Here, the 2016 Chimney Tops 2 wildfire, a rare severe wildfire in the eastern United States, was used as a case study for examining the role of mass tree mortality in wood loads of streams
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Aquatic habitat changes within the channelized and impounded Arkansas River, Arkansas, USA River Res. Appl. (IF 1.916) Pub Date : 2020-12-28 Jonathan Spurgeon; Mike Rhodes; J. Wesley Neal; Kristine Evans
River‐wide changes in morphologic character following channelization and impoundment alter the occurrence and distribution of surface water and available habitats for aquatic organisms. Quantifying patterns of creation, redistribution or disappearance of habitats at river‐wide and decadal spatiotemporal scales can promote understanding regarding trajectories of different habitat types following alteration
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Environmental and anthropogenic correlates of migratory speeds among Atlantic salmon smolts River Res. Appl. (IF 1.916) Pub Date : 2020-12-26 Andrew B. Harbicht; P. Anders Nilsson; Martin Österling; Olle Calles
Dams, weirs, and hydropower facilities are often cited as migratory barriers which impart significant reductions in fitness among migratory fish species. Even where upstream and downstream passage options are available, barrier passage can still often result in energetic or physical costs which compound delays or cause mortality. Past studies have identified variables associated with such fitness reductions
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A numerical modeling‐based predictive methodology for the assessment of the impacts of ship waves on YOY fish River Res. Appl. (IF 1.916) Pub Date : 2020-12-22 Gábor Fleit; Christoph Hauer; Sándor Baranya
The effects of inland navigation on the aquatic ecosystem are numerous. One of the most relevant impacts from the ecohydraulic point of view is ship‐induced waves, resulting in the local and temporary alteration of the hydrodynamic regime, especially in shallow water areas. In this paper, a novel hydrodynamic modeling‐based evaluation framework is presented and tested for the prediction of habitat
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Role of bar‐channel interactions in a dominant branch shift: The Taipingkou waterway, Yangtze River, China River Res. Appl. (IF 1.916) Pub Date : 2020-12-22 Peng Hu; Yunlong Lei; Shaoyi Deng; Zhixian Cao; Huaihan Liu; Zhiguo He
Previous investigations regarding river bifurcation mainly focus on the conditions of a stable bifurcation and how key factors affect the asymmetrical features of a bifurcation. In this paper, a numerical case study is presented of the 2012–2014 north to south shift in the Sanba mid‐channel bar of the Taipingkou waterway's dominant branch in the Yangtze River, China. Numerical reproduction of the bar‐channel
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The performance of diatom indices in assessing temporal changes in water quality in a large lowland river ecosystem River Res. Appl. (IF 1.916) Pub Date : 2020-12-17 Xiang Tan; Yan Liu; Michele A. Burford; Quanfa Zhang
Benthic diatoms are often included in bioassessment programs of river health as sensitive indicators of nutrient status and pollution. Many diatom‐based indices have been developed and are frequently used to infer conditions in water quality. However, concerns have been raised regarding the robustness of these indices in riverine systems that have natural variability in environmental conditions, including
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Secondary production of macroinvertebrates as indicators of success in stream rehabilitation River Res. Appl. (IF 1.916) Pub Date : 2020-12-15 Ahmed Faraj Ali Al‐Zankana; Tom Matheson; David Malcolm Harper
Hydromorphological rehabilitation is increasingly being used to reverse degradation of stream and river ecosystems. River rehabilitation projects have nevertheless been criticised for not meeting their goals or for not being monitored sufficiently well to assess whether their goals were met. There is therefore an urgent need to develop robust approaches to assessing treatment efficacy and to thus guide
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Ecological thresholds and regime shifts within hydrologically modified rivers: A 75+ year retrospective analysis River Res. Appl. (IF 1.916) Pub Date : 2020-12-10 Michael D. Delong; James H. Thorp; Jeffrey R. Anderson
Theoretical models have spurred empirical testing to understand how anthropogenic disturbances cause sudden shifts between alternative functional states. Most studies are done over short periods of time, making it difficult to determine the occurrence of ecological thresholds or regime shifts. This study used carbon stable isotope ratios (δ13C) from museum specimens of fish, mussels, and snails over
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Are hyporheic oligochaetes efficient indicators of hydrological exchanges in river bed sediment? A test in a semi‐natural and a regulated river River Res. Appl. (IF 1.916) Pub Date : 2020-12-10 Michel Creuzé des Châtelliers; Sylvain Doledec; Michel Lafont; Marie‐José Dole‐Olivier; Lara Konecny; Pierre Marmonier
River‐groundwater exchanges are crucial for several ecological processes, but difficult to localize. Hyporheic oligochaetes may represent efficient biological indicators of these exchanges, but hydrological disturbance may alter oligochaete distribution and blur the spatial patterns of river‐groundwater exchanges. Oligochaete assemblages were compared in the Drôme River, which is a semi‐natural braided
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Modeling response of water temperature to channelization in a coastal river network River Res. Appl. (IF 1.916) Pub Date : 2020-12-09 Robert L. Miller
This study investigates the role of channelization works on water temperatures in the Vermilion River network located in coastal Louisiana, USA. A physically based one‐dimensional (1D) approach is taken for hydrodynamics and heat exchange in the Vermilion River as an initial step toward understanding the cumulative effects of flood control on riverine water quality and aquatic population dynamics.
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Experimental study on the critical breakup condition of a static armour layer River Res. Appl. (IF 1.916) Pub Date : 2020-12-09 Qiang Wang; Lu Wang; Tao Wang; Kejun Yang; Ruihua Nie
High‐flow intensity over a well‐developed static armour layer will significantly reduce the stability of a riverbed. However, the intensity at which the static armour layer would completely break is not known. In this study, laboratory flume experiments were conducted to analyze the response of the static armour layer to high‐flow intensity. The static armour layer was developed under the condition
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Climate‐linked freshwater habitat change will have cost implications: Pest blackfly outbreaks in two linked South African rivers River Res. Appl. (IF 1.916) Pub Date : 2020-12-09 Nicholas A. Rivers‐Moore; Ferdy C. de Moor
Calls for implementation of environmental flows have been growing over the past 20 years, and their implementation is now being recognized. The need for such assessments to occur in conjunction with maintenance of environmental water temperatures has also been emphasized. When the costs of departures from natural thermal regimes are considered, this moves from being an academic exercise to a tangible
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Using field sign surveys to estimate spatial distribution and territory dynamics following reintroduction of the Eurasian beaver to British river catchments River Res. Appl. (IF 1.916) Pub Date : 2020-12-09 Róisín Campbell‐Palmer; Alan Puttock; Kelsey A. Wilson; Alicia Leow‐Dyke; Hugh A. Graham; Martin J. Gaywood; Richard E. Brazier
Eurasian beavers, keystone species, have returned to inhabit much of its former range following near extinction. Evidence repeatedly demonstrates that beavers can provide important riparian biotic and abiotic ecosystem services. These abilities to modify their surroundings can cause conflict, especially in prime agricultural landscapes. Understanding how beavers are utilizing and expanding in European
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Swimming through the urban heat island: Can thermal mitigation practices reduce the stress? River Res. Appl. (IF 1.916) Pub Date : 2020-10-07 Anne Timm; Valerie Ouellet; Melinda Daniels
Green infrastructure (GI) and other stormwater management practices are commonly designed to reduce stormflow volume and pollutant loads by using infiltration, retention, and evapotranspiration to capture stormwater. Although these methods are be designed to reduce impacts of stormwater volumes and pollutant loads, they may not be designed to mitigate thermal load from stormwater runoff in urban areas
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Effects of dewatering on behavior, distribution, and abundance of larval lampreys River Res. Appl. (IF 1.916) Pub Date : 2020-09-27 Julianne E. Harris; Joseph J. Skalicky; Theresa L. Liedtke; Lisa K. Weiland; Benjamin J. Clemens; Ann E. Gray
Anthropogenic dewatering of aquatic habitats can cause stranding and mortality of burrowed larval lampreys; however, the effects of dewatering have not been quantified. We assessed: (a) changes in spatial distribution, abundance, and emergence of larvae dewatered at Leaburg Reservoir (OR); (b) emergence and mortality of larvae dewatered in a laboratory; and (c) bias, precision, and interpretation of
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River connectivity restoration for upstream‐migrating European river lamprey: The efficacy of two horizontally‐mounted studded tile designs River Res. Appl. (IF 1.916) Pub Date : 2020-09-27 Angus J. Lothian; Jeroen S. Tummers; Atticus J. Albright; Pat O'Brien; Martyn C. Lucas
Many rivers are heavily fragmented, resulting from anthropogenic cross‐channel structures. Cost‐effective solutions are needed to restore habitat connectivity for migratory fishes, including those of conservation concern, such as the European river lamprey (Lampetra fluviatilis). Studded material is becoming increasingly used as a low‐cost retrofit solution for lamprey passage at sloping weirs, although
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Observations regarding Lake Sturgeon spawning below a hydroelectric generating station on a large river based on egg deposition studies River Res. Appl. (IF 1.916) Pub Date : 2020-10-07 Mark A. Gillespie; Craig A. McDougall; Patrick A. Nelson; Thomas Sutton; Donald S. MacDonell
Spawning behaviour of the Lake Sturgeon (Acipenser fulvescens) in large rivers is poorly understood, complicating the approach to fish‐friendly hydroelectric design and mitigation. In 2006, dam safety concerns prompted the need to modernize the spillway infrastructure of the 100‐year old Pointe du Bois Generating Station on the Winnipeg River, Manitoba. The associated regulatory process provided an
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Using two‐dimensional modeling to evaluate strategies of sediment reduction and evacuation for Nanshi river under Guishan dam operations River Res. Appl. (IF 1.916) Pub Date : 2020-10-04 Ho‐Ting Su; Gene Jiing‐Yun You; Chia‐Chu Chu
This paper presents a unique case study of Nanshi River in Taiwan which may be able to serve as the basis for decision making and river maintenance operations or as a reference for other cases. This study area is composed of regions from upstream alluvial channel to delta‐front and the Guishan Dam reservoir, with a surplus of material supply to transport capacity in the whole region. Dredging is a
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Relationship between environmental variables and egg abundance of the four major Chinese carps, downstream of the Three Gorges Reservoir River Res. Appl. (IF 1.916) Pub Date : 2020-12-01 Wei Xu; Zhi Yang; Ran Yi; Jinzhong Yao; Xiaojuan Chen
Reservoir “eco‐operation” is an ecological flow regulation measure, such as mimicking a flood process to stimulate fish spawning. Since 2011, the Three Gorges Reservoir (TGR) eco‐operation trials have been carried out to facilitate the spawning of the four major Chinese carps (FMCC) below the Gezhouba Dam. Until now, the response of FMCC spawning to new hydrologic conditions is seldom documented. Using
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What remains today of pre‐industrial Alpine rivers? Census of historical and current channel patterns in the Alps River Res. Appl. (IF 1.916) Pub Date : 2020-11-30 Severin Hohensinner; Gregory Egger; Susanne Muhar; Lise Vaudor; Hervé Piégay
To date, no survey on the diverse channel patterns existing prior to the major phase of river regulation in the mid‐19th–early 20th century has been elaborated at the scale of the whole European Alps. The present paper fills this knowledge gap. The historical channel forms of the 143 largest Alpine rivers with catchments larger than 500 km2 (total length 11,870 km) were reconstructed based on maps
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Beaver dam analogue configurations influence stream and riparian water table dynamics of a degraded spring‐fed creek in the Canadian Rockies River Res. Appl. (IF 1.916) Pub Date : 2020-11-29 Tariq M. Munir; Cherie J. Westbrook
Beaver dam analogues (BDAs) are intended to simulate natural beaver dam ecohydrological functions including modifying stream hydrology and enhancing stream‐riparian hydrological connectivity. River restoration practitioners are proactively deploying BDAs in thousands of degraded streams. How various BDAs or their configurations impact stream hydrology and the riparian water table remains poorly understood
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Development of habitat suitability criteria for conservation of the black‐necked crane in Nyamjang Chu River in eastern Himalaya, India in connection with a proposed hydropower dam River Res. Appl. (IF 1.916) Pub Date : 2020-11-24 Jeyaraj A. Johnson; Taibanganba Watham; Govindan V. Gopi; Kuppusamy Sivakumar
We developed the habitat suitability criteria for the black‐necked Crane (BNC) to manage their wintering habitat in the Nyamjang Chu River in Zemithang valley, India. We generated habitat suitability criteria (HSC) curves for BNC based on the habitat availability in the river channel and use by the BNC. The HSC curves indicated that BNC preferred velocity ranged from 0 to 0.2 m/s and depth ranged from
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Population effect of a large‐scale stream restoration effort on Chinook salmon in the Pahsimeroi River, Idaho River Res. Appl. (IF 1.916) Pub Date : 2020-11-12 Timothy Copeland; Demitra Blythe; Windy Schoby; Eli Felts; Patrick Murphy
Stream habitat restoration is an important tool for fisheries management in impaired lotic systems. Although small‐scale benefits of stream habitat restoration are commonly investigated, it is difficult to demonstrate population effects. The Pahsimeroi River Chinook salmon Oncorhynchus tshawytscha population was previously restricted to the lower portion of the river by multiple irrigation structures
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The influence of the coastal plain on the downstream material fluxes from a small coastal mountainous river basin River Res. Appl. (IF 1.916) Pub Date : 2020-11-09 Mauricio Mussi Molisani; Anandra Machado; Roberto Nascimento de Farias; Michael Douglas Peçanha de Souza; Paula Sigilião Isacksson; Francisco de Assis Esteves
Small mountainous coastal basins display steeper gradients, suggesting intensified river transport. However, there is little information about downstream trends in rivers with low discharge and material fluxes across coastal plains and its influence on land‐sea material transport. This study examined 2 years of river discharge, suspended sediment and nutrient concentrations, fluxes and yields from
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Hybrid modelling of low velocity zones in box culverts to assist fish passage: Why simple is better! River Res. Appl. (IF 1.916) Pub Date : 2020-09-09 Xinqian Leng; Hubert Chanson
A culvert is a covered road structure constructed to pass flood and drainage. The engineering design principle of culverts focuses on optimising flood capacity at the lowest possible cost, resulting in high flow velocity through the barrel. With modern engineering design being more environmentally aware, culverts are considered common barriers for fish migrating upstream due to the excessive barrel
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River channel response to dam removals on the lower Penobscot River, Maine, United States River Res. Appl. (IF 1.916) Pub Date : 2020-09-02 Mathias J. Collins; Alice R. Kelley; Pamela J. Lombard
Most geomorphology studies of dam removals have focused on sites with appreciable quantities of stored sediments. There is great interest in channel responses to sediment releases because of potential effects on aquatic and riparian habitats and human uses of these areas. Yet, behind many dams in the Northeast U.S. and other regions of the world only minor accumulations of sediment are present because
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Incorporating sediment non‐stationarity into ice‐affected flood‐risk projections River Res. Appl. (IF 1.916) Pub Date : 2020-09-28 Stanford Gibson; Carrie Vuyovich; Mary Weidel
Sediment deposition and ice jams can both increase river stages. Ice and sediment both reduce channel conveyance, affecting the flow‐stage relationship and flood risk. Classic hydrologic statistics systemically under‐predict flood risk in depositional rivers or reaches with frequent ice jams. However, when both processes influence not only flood stage but each other, the interacting processes can complicate
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Opportunities and challenges for restoration of the Merced River through Yosemite Valley, Yosemite National Park, USA River Res. Appl. (IF 1.916) Pub Date : 2020-09-02 Derek B. Booth; Katie Ross‐Smith; Elizabeth K. Haddon; Thomas Dunne; Eric W. Larsen; James W. Roche; Greg M. Stock; Virginia Mahacek
Successful river restoration requires understanding and integration of multiple disciplinary perspectives, including evaluations of past and ongoing watershed processes, local geomorphic response, and impacts unique to human activity. Nowhere is this more apparent than along the Merced River in Yosemite National Park, USA, where both an outstanding natural landscape and the consequences of over a century
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Sustainability of a navigation channel in the Nile River: A case study in Egypt River Res. Appl. (IF 1.916) Pub Date : 2020-09-16 Esam Helal; Hossam Elsersawy; Enas Hamed; Fahmy Salah Abdelhaleem
Inland waterways are an environmentally friendly and efficient mode of transport. At locations along the Nile River, Egypt, navigation is hindered requiring expensive, resource‐intensive corrective. An increasing number of navigational bottlenecks have occurred between 1982 and 2015 because of changing river channel morphologies. This study provides a suitable method for evaluating navigation conditions
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Stabilization of stage–discharge curves following the establishment of forest plantations: Implications for sediment production River Res. Appl. (IF 1.916) Pub Date : 2020-09-14 Roberto Pizarro; Pablo García‐Chevesich; Juan Pino; Alfredo Ibáñez; Felipe Pérez; Juan Pablo Flores; Jonathan O. Sharp; Ben Ingram; Romina Mendoza; Daniel G. Neary; Claudia Sangüesa; Carlos Vallejos
The Purapel watershed in central Chile has experienced drastic land‐use changes since the 1950s, beginning with the conversion of native forests to forest plantations. Controversy exists on the effects of reforestation on sediment production in watersheds. The temporal evolution of stage–discharge curves and sediment production was evaluated and correlated with historic sediment deposition at the Purapel
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New grassland riparian zone delineation method for calculating ecological water demand to guide management goals River Res. Appl. (IF 1.916) Pub Date : 2020-09-21 Duo Lan; Yu Rui‐Hong
River flow provides water that maintains the ecological health of both the river itself and the adjoining riparian zones. However, there is a lack of clear definition and identification method of the riparian zone of inland river basins with narrow river channels and anthropogenic intervention reservoirs. In this study, we developed a new method to delineate semiarid grassland riparian zones by taking
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Floodwater harvesting to manage irrigation water and mesquite encroachment in a data‐sparse river basin: an eco‐hydrological approach River Res. Appl. (IF 1.916) Pub Date : 2020-09-09 Zryab Babker; Nadir Ahmed Elagib; Islam Sabry Al Zayed; Rayyan Sulieman
This investigation attempts to understand the eco‐hydrology of, and accordingly suggest an option to manage floodwater for agriculture in, the understudied and data‐sparse ephemeral Baraka River Basin within the hyper‐arid region of Sudan. Reference is made to the major feature of the basin, that is, the Toker Delta spate irrigation scheme. A point‐to‐pixel comparison of gridded and ground‐based data
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Turbulent flow structure in a vegetated non‐prismatic compound channel River Res. Appl. (IF 1.916) Pub Date : 2020-09-16 Fatemeh Vojoudi Mehrabani; Mirali Mohammadi; Seyed A. Ayyoubzadeh; João N. Fernandes; Rui M. L. Ferreira
The presence of vegetation on the floodplains of compound channels affects the structure of mean flow, increases flow resistance and turbulence intensity, and impacts sediment transport. In prismatic compound channels, the shear stress at the interface between the flows in the main channel and lateral floodplains has a strong influence in the cross sectional velocity distribution and thus conveyance
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Uncertainties associated with environmental flow metrics River Res. Appl. (IF 1.916) Pub Date : 2020-09-13 Gabriel Goguen; Daniel Caissie; Nassir El‐Jabi
The demand for water withdrawal from rivers continues to increase world‐wide, and these water withdrawals can affect fish habitat and aquatic life in general. The study of river hydrology and environmental flows often require the calculation of flow metrics (e.g., mean annual flow, flow duration statistics, low flow frequency analyses, etc.); however, uncertainties in these flow metrics have not been
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Effects of extreme high flow events on macroinvertebrate communities in Vermont streams River Res. Appl. (IF 1.916) Pub Date : 2020-09-09 Jen Stamp; Aaron Moore; Steve Fiske; Jeroen Gerritsen; Britta Bierwagen; Anna Hamilton
Heavy precipitation events and subsequent high flows are occurring with greater frequency and intensity, which could have substantial implications for biomonitoring programs that typically evaluate changes in biological condition due to stressors at local and watershed scales. In this study we evaluated response and recovery of macroinvertebrate communities at nine reference quality streams located
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Predicted effects of flow diversion by Run‐of‐River hydropower on bypassed stream temperature and bioenergetics of salmonid fishes River Res. Appl. (IF 1.916) Pub Date : 2020-09-09 Pascale Gibeau; Wendy J. Palen
Many anthropogenic disturbances impact stream ecosystems by changing flow and temperature regimes. The emerging industry of small Run‐of‐River (RoR) hydropower reduces streamflow in bypassed reaches, with largely unknown consequences for water temperatures and fish growth. We used empirical and simulated data from two small RoR regulated streams in British Columbia (Canada) to quantify changes in water
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Assessing the impact of large barrages on habitat of the Ganga River dolphin River Res. Appl. (IF 1.916) Pub Date : 2020-09-09 Gaurav Kailash Sonkar; Kumar Gaurav
Riverine habitats are degrading at an alarming rate due to anthropogenic interventions. Construction of large dams and barrages on the Ganga River has severely fragmented the riverine habitat of dolphins. This study examines the impact of structural barriers on the habitat of the Ganga River dolphin (Platanista gangetica) in a reach between Bijnor and Narora barrage in the middle Ganga and at the Farakka
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Assessing restoration potential for beaver (Castor canadensis) in the semiarid foothills of the Southern Rockies, USA River Res. Appl. (IF 1.916) Pub Date : 2020-09-16 Zachary Kornse; Ellen Wohl
We used the Beaver Restoration Assessment Tool (BRAT) developed at Utah State University to develop spatially explicit estimates of maximum beaver‐carrying capacity in a 160 km2 watershed in the foothills of the Southern Rockies. The watershed does not currently have beaver but has extensive evidence of past beaver occupation. BRAT uses input data on stream flow, topography, and vegetation. We compared
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Weathering the storm: Improving the availability and stability of artificial shelters for hellbender salamanders River Res. Appl. (IF 1.916) Pub Date : 2020-09-23 Sky T. Button; John J. Hallagan; Catherine M. Bodinof Jachowski; Brian F. Case; Jordy Groffen; William A. Hopkins
Artificial shelters show considerable promise as tools for studying imperiled hellbender salamanders. Their full utility has not yet been fully reached in practice, however, because during initial trials shelters often became blocked by sediment or dislodged during high stream discharge events. To determine whether these challenges could be overcome, we deployed 438 artificial shelters of two different
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Comparison of experimental and computational methods for discharge measurements from tidal wetlands River Res. Appl. (IF 1.916) Pub Date : 2020-09-11 Samuel F. Harding; André M. Coleman; G. Curtis Roegner
This short communication describes the use and comparison of three methods used to calculate the flow discharge from tidal wetland streams. The techniques presented are (a) bottom‐mounted ADCP deployments, (b) vessel‐mounted ADCP transects, and (c) a volume inundation spatial model that relies on a high‐resolution LiDAR dataset and time‐series of water surface elevation data. The relative agreement
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Invasive Japanese knotweed (Reynoutria japonica Houtt.) and related knotweeds as catalysts for streambank erosion River Res. Appl. (IF 1.916) Pub Date : 2020-09-17 Brian Colleran; Shaw Nozaki Lacy; Maria Rafaela Retamal
Japanese knotweed (Reynoutria japonica) and the other invasive knotweeds, collectively known as knotweed s.l., are significant invasives worldwide, especially of riparian areas. While R. japonica and other knotweed s.l. can reproduce sexually, their dispersal to and spread within new regions is often accomplished through vegetative reproduction from rhizome and stem fragments. Once established, knotweed
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The potential contribution of small coastal streams to the conservation of declining and threatened diadromous fishes, especially the European eel River Res. Appl. (IF 1.916) Pub Date : 2020-11-04 Gordon H. Copp; Françoise Daverat; Tea Bašić
Human‐generated pressures are continuing to have a detrimental effect on diadromous fishes, resulting in legislative initiatives to conserve and manage these species. Field studies to inform these initiatives focus almost exclusively on larger marine, estuarine, and inland waters, neglecting the role of small coastal streams and tributaries in population recovery. As an example of the potential contribution
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Relating social networks, ecological health, and reservoir basin governance River Res. Appl. (IF 1.916) Pub Date : 2020-11-02 Karen I. Trebitz; J.D. Wulfhorst
The Columbia River Basin is a complex social‐ecological system, spanning political, legal, socio‐economic, geographic, and biophysical boundaries. Outreach to others in social networks develops fundamental communications needed for sustainable collaborations in adaptive management. However, operationalizing and comparing measures of social processes and outcome success in biophysical indicators remains
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Effects of obstacles and flow velocity on locomotory behavior in juvenile, silver carp, Hypophthalmichthys molitrix River Res. Appl. (IF 1.916) Pub Date : 2020-10-29 Senfan Ke; Zhiying Tu; Junjun Tan; Defu Liu; Shuangke Sun; Xiaotao Shi
We currently have only a minimal understanding of energy‐saving strategies of fish in unsteady flows. In this study, we found that obstacle shape can affect swimming ability of fish: our results suggested that a half cylinder improved critical swimming speed of silver carp (Hypophthalmichthys molitrix) compared with swimming downstream of a full cylinder, square tube or for free‐flow conditions. We
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The influence of hydro‐climatic and anthropogenic effects on the long‐term variation of commercial fisheries in a large floodplain river River Res. Appl. (IF 1.916) Pub Date : 2020-10-21 Ana P. Rabuffetti; Luis A. Espínola; Elie Abrial; Mario L. Amsler; Maria F. Eurich; Martín C. M. Blettler
This study deals with the effects of climate fluctuations and anthropogenic impacts on fisheries of Paraná River over the last 100 years. It is the first attempt to appraise the influence of hydro‐climatic and anthropogenic variables on the population changes of the most important inland fisheries of Argentina. Datasets covering more than eight decades (1935–2016) of a number of frequent and abundant
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Why people like or dislike large wood in rivers—a representative survey of the general public in Germany River Res. Appl. (IF 1.916) Pub Date : 2020-10-20 Cedric Mats Gapinski; Johannes Hermes; Christina von Haaren
For the restoration of medium and small rivers, the reintroduction of large wood (LW) is crucial. Despite the wide communication of the ecological key functions of LW, residents rejected its reintroduction in a restoration project at the river Mulde (Dessau‐Roßlau, Germany). To determine whether this is a local or widespread phenomenon in Germany, we investigated (a) the German population's attitude
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Prioritizing reaches for restoration in a regulated Alpine river: Locally driven versus hydro‐morphologically based actions River Res. Appl. (IF 1.916) Pub Date : 2020-10-19 Mauro Carolli; Francesca Gelmini; Stefano Pellegrini; Micaela Deriu; Guido Zolezzi
We discuss the prioritization of river reaches to be selected for restoration measures under the constraints of financial resource limitation. We propose and apply a simple approach based on the quantification of major hydro‐morphological alterations and the critical comparison with locally proposed restoration actions. The available hydro‐morphological and ecological data for the approach do not go
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Is multicomponent environmental flow management always better than the fixed minimum flows for a river ecosystem? River Res. Appl. (IF 1.916) Pub Date : 2020-10-14 Shan He; Hongrui Liu; Enze Zhang; Ting Gao
Environmental flows (e‐flows) management is a basic task in reservoir operation. A simple approach for managing e‐flows is to maintain a fixed minimum flow, which releases at least a constant amount of water to sustain daily streamflow. Then e‐flows management becomes increasingly more sophisticated. Newer approaches include multicomponent e‐flow management, which provides different flows during different
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Performance of ensemble‐learning models for predicting eutrophication in Zhuyi Bay, Three Gorges Reservoir River Res. Appl. (IF 1.916) Pub Date : 2020-10-12 Mingming Hu; Yuchun Wang; Zhiyu Sun; Yuming Su; Shanze Li; Yufei Bao; Jie Wen
Eutrophication and sporadic algal blooms occurring in the tributary bays of the Three Gorges Reservoir in Hubei, China, have become major environmental issues following impoundment. However, predicting eutrophication with traditional methods based on monthly monitoring data remains challenging. In order to explore the potential of data‐driven models in eutrophication prediction and establish reliable
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Floodplain forest dynamics: Half‐century floods enable pulses of geomorphic disturbance and cottonwood colonization along a prairie river River Res. Appl. (IF 1.916) Pub Date : 2020-10-12 Laurens J. Philipsen; Margaret A. Romuld; Stewart B. Rood
In dry ecoregions, trees are restricted to river valley floodplains where river water supplements the limited local precipitation. Around the Northern Hemisphere, cottonwoods, riparian poplars, are often predominant trees in floodplain forests and these ecological specialists require floods that create and saturate sand and gravel bars, enabling seedling recruitment. By pairing the interpretation of
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Consideration of spatial and temporal scales in stream restorations and biotic monitoring to assess restoration outcomes: A literature review, part 1 River Res. Appl. (IF 1.916) Pub Date : 2020-08-23 Michael B. Griffith; Michael G. McManus
Stream and river restoration practices have become common in many parts of the world. We ask the question whether such restorations improve freshwater biotic assemblages or functions over time, and if not, can general reasons be identified for such outcomes. We conducted a literature survey and review of studies in which different types of stream restorations were conducted and outcomes reported. These
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Consideration of spatial and temporal scales in stream restorations and biotic monitoring to assess restoration outcomes: A literature review, part 2 River Res. Appl. (IF 1.916) Pub Date : 2020-08-23 Michael B. Griffith; Michael G. McManus
Stream and river restoration practices have become common in many parts of the world. To answer the question whether such restoration measures improve freshwater biotic assemblages or functions over time, and if not, can general reasons be identified for such outcomes, we conducted a literature survey and review of studies in which different types of stream restorations were conducted and outcomes
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Large dam renewals and removals—Part 1: Building a science framework to support a decision‐making process River Res. Appl. (IF 1.916) Pub Date : 2020-08-04 R. Allen Curry; Gordon Yamazaki; Tommi Linnansaari; Wendy Monk; Kurt M. Samways; Rebecca Dolson; Kelly R. Munkittrick; Anthony Bielecki
Altered rivers and managed flows are a hallmark of civilization and dams are a principal agent of alteration. Peak dam construction occurred at the turn of the last century in Western countries, and many of the largest dams are reaching the end of their service life. As a result, dam operators are increasingly facing a complex renewal/removal decision‐making process in a large part because the economic
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A novel method to evaluate stream connectivity using trail cameras River Res. Appl. (IF 1.916) Pub Date : 2020-08-04 Christopher J. Bellucci; Mary E. Becker; Melissa Czarnowski; Corinne Fitting
Stream connectivity is important for the ecological health of the stream and downstream waters. In this study, we use the term stream connectivity to mean hydrologically connected pools and riffles that link stream habitat along a longitudinal continuum (upstream to downstream), while also recognizing the lateral dimension (connection to flood plain) and vertical connection to groundwater. There are
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Flow and sediment behaviours and morpho‐dynamics of a diffluence−Confluence unit River Res. Appl. (IF 1.916) Pub Date : 2020-08-13 Qiancheng Xie; James Yang; T. Staffan Lundström
A diffluence‐confluence unit is an elementary component within a river system and presents a complex yet linked pattern of both flow and sediment transport in between. This study deals, by means of field investigations and numerical modelling, with morpho‐dynamics of such a unit on the lower Yangtze River reaches. The unit comprises, looking downstream, a secondary (left) course and a main (right)
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Instream wood increases riverbed temperature variability in a lowland sandy stream River Res. Appl. (IF 1.916) Pub Date : 2020-08-05 Megan J. Klaar; Felicity S. Shelley; David M. Hannah; Stefan Krause
The (re)introduction of wood into rivers is becoming increasingly popular in river restoration and natural flood management schemes. While instream wood is known to promote geomorphic and hydraulic diversity, the impact of wood in driving surface water‐streambed exchange and subsequent streambed temperatures remains under‐researched, particularly in lowland rivers. We make use of the occurrence of
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Experiments on restoring alluvial cover in straight and meandering rivers using gravel augmentation River Res. Appl. (IF 1.916) Pub Date : 2020-08-27 Matilde Welber; Elli Papangelakis; Peter Ashmore; Bruce MacVicar
Successful management of natural and engineered channels with discontinuous alluvial cover requires knowledge of how the cover develops and evolves. We report on physical model experiments designed to compare alluvial cover dynamics in straight and sinuous fixed‐bed channels at a range of gravel‐bed material supply rates and constant discharge conditions. Experiments investigated the formation of alluvial
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Impact of a hydroelectric power plant on migratory fishes in the Uruguay River River Res. Appl. (IF 1.916) Pub Date : 2020-08-10 Daniel Cataldo; Florencia Gattás; Valentín Leites; Facundo Bordet; Esteban Paolucci
Dams alter river functioning and hinders the free movement of migratory fishes. We analysed the effects of a subtropical dam on the reproduction of migratory fishes using data from ichthyoplankton monitoring surveys. These were conducted at six sampling stations upstream, downstream and within the reservoir on a weekly basis during 6 years. The dam had a direct impact on fish movement, leading to the
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Assessing the potential for spectrally based remote sensing of salmon spawning locations River Res. Appl. (IF 1.916) Pub Date : 2020-08-12 Lee R. Harrison; Carl J. Legleiter; Brandon T. Overstreet; Tom W. Bell; John Hannon
Remote sensing tools are increasingly used for quantitative mapping of fluvial habitats, yet few techniques exist for continuous sampling of aquatic organisms, such as spawning salmonids. This study assessed the potential for spectrally based remote sensing of salmon spawning locations (i.e., redds) using data acquired from unmanned aircraft systems (UAS) along a large, gravel‐bed river. We developed
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