Article
Geosciences, Multidisciplinary
Brandee N. Carlson, Jeffrey A. Nittrouer, Travis E. Swanson, Andrew J. Moodie, Tian Y. Dong, Hongbo Ma, Gail C. Kineke, Minglong Pan, Yuanjiang Wang
Summary: This study explores avulsion and engineered diversion scenarios in the Huanghe delta, where three lobes were abandoned in the last 40 years. It finds that the stability of shorelines facing reduced sediment supply is dependent on elevation before sediment loss, freshwater supply, and vegetation coverage. These findings have implications for future sediment and water diversions, by informing strategies that optimize land preservation.
GEOPHYSICAL RESEARCH LETTERS
(2021)
Article
Engineering, Civil
Sofia Melo Vasconcellos, Masato Kobiyama, Fernanda Stachowski Dagostin, Claudia Weber Corseuil, Vinicius Santana Castiglio
Summary: The study applied three models to investigate flood hazards in alluvial fans in southern Brazil, showing that the combination of the FAN and HAND models can more accurately represent the most recent flood event, demonstrating good performance metrics.
WATER RESOURCES MANAGEMENT
(2021)
Article
Geosciences, Multidisciplinary
Rawan Alasad, Cornel Olariu, Ronald J. Steel
Summary: This study examines the marine flooding of the Mio-Pliocene alluvial fan and fan-delta succession in the Fish Creek Vallecito Basin in southern California. The results show an abrupt lithologic and facies change from subaerial debrites to subaqueous debrites, indicating a subsea-level environment.
Article
Geology
Douglas A. Edmonds, Harrison K. Martin, Jeffery M. Valenza, Riley Henson, Gary S. Weissmann, Keely Miltenberger, Wade Mans, Jason R. Moore, Rudy L. Slingerland, Martin R. Gibling, Alexander B. Bryk, Elizabeth A. Hajek
Summary: A new style of river avulsion, called retrogradational avulsion, has been identified in densely forested fluvial fans in the Andean and New Guinean alluvial basins. It is initiated by channel blockages that cause overbank flow, creating a chevron-shaped flooding pattern. This new style of floodplain sedimentation has not been accounted for in ecological and stratigraphic models.
Article
Geosciences, Multidisciplinary
Luca Colombera, Nigel P. Mountney
Summary: The avulsion frequency of coastal-plain rivers is primarily controlled by the elevation difference between channels and neighboring plains, as well as multiple factors such as wave and tidal processes, rates of sea-level change, and bathymetry of the receiving basin. This study analyzes the relationship between these downstream factors and avulsion frequency in 57 Holocene lowland river systems, finding that wave and tidal processes may have a modest influence and there is no consistent relationship with offshore bathymetric gradient or sea-level fluctuations. This suggests that upstream or intrabasinal factors may play a more important role.
JOURNAL OF GEOPHYSICAL RESEARCH-EARTH SURFACE
(2023)
Article
Environmental Sciences
Md Sariful Islam, Thomas W. Crawford
Summary: This study aims to evaluate different methods for predicting future shoreline positions and quantifies prediction performance based on the time depths of historical shoreline data and the time horizons of predicted shorelines. The results show that using more shoreline data improves prediction performance, and the prediction accuracy is higher for the immediate future compared to the more distant future.
Article
Engineering, Civil
Mohammad M. Sedghi, Hongbin Zhan
Summary: This research focuses on obtaining semi-analytical solutions for the discharge variations of qanats in an alluvial fan aquifer. The study explores the influence of hydraulic and geometric parameters on the discharge of qanats.
JOURNAL OF HYDROLOGY
(2022)
Article
Environmental Sciences
Jofre Herrero, Diana Puigserver, Ivonne Nijenhuis, Kevin Kuntze, Beth L. Parker, Jose M. Carmona
Summary: Ecotones in aquifers serve a significant role in regulating matter and energy flux, characterized by steep gradients and high biological diversity. Geological heterogeneities in ecotones play a crucial role in microbial diversity and dehalogenation reactions of chloroethenes.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2021)
Article
Geosciences, Multidisciplinary
Ningjie Hu, A. Brad Murray, Katherine M. Ratliff, Zachary Little, Eric W. H. Hutton
Summary: The asymmetry of wave climates affects delta avulsion behaviors and shape evolution. Increasing wave-climate asymmetry reduces the curvature of updrift delta flanks and increases the possibility of downdrift locations. However, under certain conditions, wave climates may inhibit downdrift avulsions.
GEOPHYSICAL RESEARCH LETTERS
(2022)
Article
Environmental Sciences
Adrija Raha, Mery Biswas
Summary: The study focused on medium-sized alluvial fans in the Himalayan foreland area, estimating their tectonic activeness using morphotectonic indicators and ranking them using statistical methods. It was found that within a common climatic zone and similar neo-tectonic setting, medium-sized fans exhibit differential morphotectonic signatures and dynamic aggradation processes.
JOURNAL OF MOUNTAIN SCIENCE
(2022)
Article
Multidisciplinary Sciences
Tzu-Yin Kasha Chen, Chi-Yao Hung, Jared Mullenbach, Kimberly Hill
Summary: Alluvial fans are depositional structures commonly found at the base of mountain ranges. They contribute significantly to local hazards when frequented by debris flows. This study analyzed field data and conducted experiments to investigate the correlation between fine particle content and directional changes in debris flows. The research found that decreasing fine particle content increases the variability of fan slopes and longer-term continuous experiments result in more complex surface channelizations compared to repeated flows.
SCIENTIFIC REPORTS
(2022)
Article
Multidisciplinary Sciences
Svein-Erik Hamran, David A. Paige, Abigail Allwood, Hans E. F. Amundsen, Tor Berger, Sverre Brovoll, Lynn Carter, Titus M. Casademont, Leif Damsgard, Henning Dypvik, Sigurd Eide, Alberto G. Fairen, Rebecca Ghent, Jack Kohler, Michael T. Mellon, Daniel C. Nunes, Dirk Plettemeier, Patrick Russell, Matt Siegler, Mats Jorgen Oyan
Summary: The Radar Imager for Mars Subsurface Experiment has conducted the first rover-mounted ground-penetrating radar survey of the Martian subsurface, revealing strongly reflecting layered sequences and providing insights into the geological history of Mars.
Article
Geosciences, Multidisciplinary
Marisa C. Palucis, A. M. Morgan, J. V. Strauss, F. Rivera-Hernandez, J. A. Marshall, E. Menio, R. Miller
Summary: Alluvial fans are formed by the interaction of fluvial and debris flow processes in various climates. Correct identification of these processes is crucial for reconstructing the climate and water history of alluvial fans on Earth and Mars. Current understanding is primarily based on terrestrial fans in hot, dry climates, while the prevailing interpretation for Martian fans is that they were sourced from snowmelt under warming periglacial conditions. In order to characterize periglacial fan formation processes, a field study was conducted on the Black Mountain alluvial fan in Canada. The study found active fluvial bedload transport and small debris flows resulting from ice-filled gullies. The results emphasize the need to be cautious in interpreting Martian sedimentary processes and climate based solely on fan surface morphology.
GEOLOGICAL SOCIETY OF AMERICA BULLETIN
(2023)
Article
Remote Sensing
Abhilash Singh, Mood Niranjan Naik, Kumar Gaurav
Summary: This study uses satellite images and artificial neural network models to assess the effect of structural barriers on drainage congestion and flood inundation in the alluvial Fan of the Kosi River. The results show that soil moisture concentration is higher near the road network and decreases gradually as we move away from the road. This study provides important insights into the impact of structural interventions on drainage congestion and flood inundation.
INTERNATIONAL JOURNAL OF APPLIED EARTH OBSERVATION AND GEOINFORMATION
(2022)
Article
Geosciences, Multidisciplinary
Amir Mohseni, Neda Mohseni, Alireza Karimi, Markus Egli
Summary: This study examined the impact of alluvial fan aging on soil organic carbon (SOC) dynamics in north-eastern Iran. The results showed that total SOC and its fractions were key indicators of soil quality. Younger alluvial fans had higher SOC content but lower soil quality, mainly due to the accumulation of coarse particulate organic carbon. Older alluvial fans, on the other hand, exhibited physical protection of SOC against microbial decomposition due to long-term weathering. Alluvial fan aging resulted in geomorphological differences and contributed to high variability of SOC dynamics.
