Article
Geography, Physical
Bruno Carvalho Carneiro de Mendonca, Luca Mao, Barbara Belletti
Summary: Rivers play a crucial role in shaping landscapes and connecting various organisms. Human disturbances often require river restoration to enhance ecological diversity and ecosystem services. The relationship between physical diversity of rivers and biological communities is not always straightforward due to complex interactions.
Article
Environmental Sciences
E. Deal
Summary: The research indicates that flow resistance in steep mountain rivers has important implications for hydraulic geometry and sediment transport. However, it is challenging to understand and predict flow resistance in these rivers due to their complex morphology and spatially variable flow. The study uses a double-averaging approach and derives a flow resistance model that compares well with a large dataset of flow velocity in natural channels. The results also suggest a degree of self-organization in bed morphology, which may simplify the prediction of flow resistance in steep mountain rivers.
WATER RESOURCES RESEARCH
(2022)
Article
Environmental Sciences
G. K. Dwyer, C. R. Cummings, S. P. Rice, Jill Lancaster, Barbara J. Downes, L. Slater, Rebecca E. Lester
Summary: This study found that the use of fractal dimensions can measure the complexity of emergent rock distributions in river systems, with entropy fractal dimensions being superior in differentiation among different streams.
WATER RESOURCES RESEARCH
(2021)
Article
Geosciences, Multidisciplinary
Sharon A. Wilson, Alexander M. Morgan, Alan D. Howard, John A. Grant
Summary: This study presents an inventory of alluvial fans and deltas within martian impact craters, indicating that these landforms are more widespread and numerous than previously reported. Alluvial fans are mainly found at higher elevations, while deltas are preferentially located at lower elevations where interactions with groundwater may have enabled the formation of lakes. The distribution of these landforms in southern mid-latitude craters suggests a late occurring, widespread source of water, consistent with late precipitation patterns.
GEOPHYSICAL RESEARCH LETTERS
(2021)
Article
Geography, Physical
Matthew J. Cashman, Gemma L. Harvey, Geraldene Wharton
Summary: The study examined the structural complexity and ecosystem engineering effects of large wood jams at four sites with varying management intensity, revealing that natural jams and sites with low riparian management intensity had the highest complexity and volume of jams. Structural complexity was found to influence the ecosystem engineering role of large wood, with more complex jams generating greater effects on flow hydraulics and sediment characteristics. The study presents a conceptual model for evaluating sites along the management intensity spectrum to inform restoration design and best practice.
EARTH SURFACE PROCESSES AND LANDFORMS
(2021)
Article
Geography, Physical
Katherine A. Woodworth, Gregory B. Pasternack
Summary: This study tested the hypothesis that a river's channel pattern and its morphological unit (MU) assemblage will remain stationary under a stationary flow and sediment regime. The study found that the MU assemblage and channel pattern of the gravel/cobble lower Yuba River shifted towards a lower-relief morphology, indicating that they were not stationary. This study suggests the need for further investigation into MU stationarity using modern mapping methods.
Article
Environmental Sciences
Teresa Gracchi, Guglielmo Rossi, Carlo Tacconi Stefanelli, Luca Tanteri, Rolando Pozzani, Sandro Moretti
Summary: This study utilized UAV photogrammetry to investigate the evolution of a 12 km stretch of the French-Italian Roia River, highlighting the changes in fluvial dynamics and vegetation coverage. The results demonstrate that UAV-based products can serve as a low-cost, non-invasive tool to support decision-makers in better understanding various fluvial processes.
Article
Geography, Physical
Frank Lehmkuhl, Georg Stauch
Summary: Large scale anthropogenic relief changes create non-equilibrium landscapes that are vulnerable to catastrophic erosion events during river floods. A recent example is the major flood in western Germany in July 2021, where the flooding of an open gravel pit by the Erft River caused massive erosional damage to a settlement. Detailed analysis revealed three geomorphological periods during the event, including rapid backward erosion, sedimentation in a temporary lake, and the river shifting towards the gravel pit. Understanding these processes can provide insights into hazards in anthropogenic landscapes.
Article
Geography, Physical
Marc Jolivet, Olivier Dauteuil, Louis Gaudare
Summary: Understanding the impact of aeolian processes on the regional-scale dynamics of fluvial systems in semi-arid regions is crucial in the context of climate change. This study examines the formation of parabolic dunes and foredunes along the main rivers of the southern Angolan Plateau and northern Kalahari Basin in Africa, using satellite images and digital elevation models. The findings highlight the interactions between factors such as wind pattern, vegetation cover, morphology of the drainage system, and transport capacity of the rivers, and their implications for fluvial dynamics and sedimentary processes.
Article
Geosciences, Multidisciplinary
V. Roseborough, D. G. Horvath, M. C. Palucis
Summary: The Gale crater on Mars contains evidence of ancient lakes during the Hesperian and Amazonian periods, with studies suggesting multiple stable lake levels and a drying trend from subhumid to semiarid conditions. Hydrologic modeling and crater counting indicate coeval lakes forming from a regional groundwater table, with intermittent surface water persisting until the Early Amazonian. This research has implications for understanding water sources affecting sediments studied by the Curiosity rover.
GEOPHYSICAL RESEARCH LETTERS
(2021)
Article
Environmental Sciences
Horacio Garcia
Summary: The gradient characteristics of bedrock rivers in the Courel Mountains Geopark were examined, revealing the presence of numerous knickzones and their relationship with environmental factors. Bedrock rivers have high ecological, scenic, landscape, and recreational value.
ENVIRONMENTAL EARTH SCIENCES
(2023)
Article
Geography, Physical
Rebecca Taormina, Lee Nordt, Mark Bateman
Summary: This study examines the alluvial terrace and floodplain deposits of the Brazos River system in central Texas through geomorphic assessment, sediment core analysis, and luminescence dating (OSL). It reveals the complex interplay between bedrock and climate on episodes of channel incision and aggradation in the late Quaternary history of the river system.
QUATERNARY INTERNATIONAL
(2022)
Article
Multidisciplinary Sciences
Lieke Ponsioen, Kalina H. Kapralova, Fredrik Holm, Benjamin D. Hennig
Summary: This study aimed to develop a standardized and low-cost approach to monitor salmonid spawning habitat using aerial imagery from drones. By applying supervised classification techniques, the researchers were able to accurately classify spawning redds and other classes in two different lakes.
Article
Multidisciplinary Sciences
Kirstie Fryirs, Fergus Hancock, Michael Healey, Simon Mould, Lucy Dobbs, Marcus Riches, Allan Raine, Gary Brierley
Summary: This paper introduces the State-wide NSW River Styles database, which provides important baseline information for river management, enabling practitioners to conduct more systematic and contextualized planning and decision-making. The authors present the main findings from the database and caution on its limitations, while also sharing expert advice on lessons learned during its development.
Article
Environmental Sciences
Robert B. Jacobson, Kristen L. Bouska, Edward A. Bulliner, Garth A. Lindner, Craig P. Paukert
Summary: Floodplains of large rivers are utilized for various purposes, but the occurrence of frequent floods has led to the consideration of managing these floodplains for ecosystem services. A study conducted on the Lower Missouri River in the USA found that the inundation metrics and their spatial distribution are influenced by geomorphic adjustments and climate change. The capacity of floodplain connectivity to influence ecosystem services varies significantly along the river and may be affected by climate change.
WATER RESOURCES RESEARCH
(2022)
