Article
Fisheries
Yelehi Diane Ahongo, Thierry Kerneis, Lionel Goardon, Laurent Labbe, Jerome Bugeon, Pierre-Yves Rescan, Florence Lefevre
Summary: The study examined the changes in technological and organoleptic qualities of female rainbow trout flesh after spawning and found that fillet quality gradually recovered over a period of approximately 24 weeks post-spawning. By around 1400 degree C.days after spawning, the quality parameters of the flesh were mostly restored to pre-spawning levels.
Article
Environmental Sciences
Raul Lopez, Fanny Ville, Celso Garcia, Ramon J. Batalla, Damia Vericat
Summary: Hydropeaking, a method of artificially generating flow peaks, has a significant impact on the hydro-sedimentary dynamics of rivers. This study investigates the effect of hydropeaking on sediment particle motion in a gravel-to-cobble bed river in the Pyrenees. The results show that the maximum flow discharged by the hydropower plant primarily affects the downstream section of the river, entraining finer particles. Differences in sediment supply, bed slope, and surface layer structure control the variability of particle motion between sections. Additionally, hydropeaking leads to partial transport, selectively removing sand and small gravel downstream and increasing armoring.
SCIENCE OF THE TOTAL ENVIRONMENT
(2023)
Article
Soil Science
Francesco G. Carollo, Costanza Di Stefano, Alessio Nicosia, Vincenzo Palmeri, Vincenzo Pampalone, Vito Ferro
Summary: Rill erosion is a significant soil process due to soil loss caused by the development of a rill network. This study investigates the applicability of a theoretical flow resistance equation on rill channels formed on different textured soils. Results show that the proposed theoretical approach can accurately estimate the Darcy-Weisbach friction factor by taking into account the interaction between flow, bed morphology, and sediment transport.
EUROPEAN JOURNAL OF SOIL SCIENCE
(2021)
Article
Limnology
Christine Anlanger, Ute Risse-Buhl, Daniel von Schiller, Christian Noss, Markus Weitere, Andreas Lorke
Summary: Epibenthic biofilms play a crucial role in regulating nitrogen fluxes in stream ecosystems. The efficiency of this regulation is influenced by both hydraulic and biological processes, with high within-stream variability observed in biofilm N uptake and uptake velocity. These findings enhance our understanding of the processes involved in biofilm N uptake at small scales and support upscaling to larger spatiotemporal scales along stream networks.
LIMNOLOGY AND OCEANOGRAPHY
(2021)
Article
Environmental Sciences
Marwan A. Hassan, Matteo Saletti, Conor McDowell, Wenqi Li
Summary: Based on an extensive 18-year data set from East Creek in British Columbia, field observations indicate that the step-pool morphology remains stable under a wide range of flows. Most events show no significant changes in sediment storage, and the mobility of sediment particles is controlled by sediment supply rather than flow magnitude.
WATER RESOURCES RESEARCH
(2023)
Article
Environmental Sciences
Shuran Yin, Yunpig Yang, Jianjun Wang, Jie Zhang, Qinghua Cai, Yude Zhu, Chenyang Wang
Summary: This study simulated the effects of navigation channel projects on the hydraulic indicators of fish habitats in the Yangtze River. The results show that the implementation of these projects increased the habitat space for fish, but the impacts varied for different fish species.
Article
Engineering, Environmental
Holly Yaryan R. Hall, Brian P. Bledsoe
Summary: Natural channel design (NCD) and analytical channel design (ACD) are two competing approaches to stable channel design that both consider sediment transport processes. This paper highlights the connection between ACD's capacity/supply ratio (CSR) and NCD's sediment capacity models (FLOWSED/POWERSED), demonstrating their convergent evolution. By modifying an existing CSR analytical spreadsheet tool, the researchers were able to predict channel stability using conventional bed load transport equations and regional sediment regression curves. The study advances the field of stream restoration by reconciling key differences between ACD and NCD and providing insights into reach scale morphodynamics.
JOURNAL OF THE AMERICAN WATER RESOURCES ASSOCIATION
(2023)
Article
Engineering, Civil
Parisa Setayesh, Hossein Afzalimehr
Summary: This study experimentally investigates the distributions of velocity in 3D in gravel bed channels with vegetation and examines six different methods for estimating bed shear stress. The distribution of shear stress is mainly controlled by the spatial distribution of vegetation and the biomechanical and architectural features of these plants, leading to a layered shape of shear stress near the bottom of the flume.
IRANIAN JOURNAL OF SCIENCE AND TECHNOLOGY-TRANSACTIONS OF CIVIL ENGINEERING
(2022)
Article
Environmental Sciences
Vijit Rathore, Nadia Penna, Subhasish Dey, Roberto Gaudio
Summary: The turbulence characteristics in open-channel flow due to a sudden change in bed roughness are investigated using Particle Image Velocimetry. The results show that the Reynolds shear and normal stresses in the downstream bed increase with the streamwise distance, and their peaks appear at a distance of one-fifth of the flow depth from the bed. The formation of a roughness-induced layer over the downstream bed thickens with the streamwise distance.
ENVIRONMENTAL FLUID MECHANICS
(2022)
Article
Chemistry, Multidisciplinary
Christopher G. Klingaa, Filippo Zanini, Sankhya Mohanty, Simone Carmignato, Jesper H. Hattel
Summary: This study conducted a qualitative analysis of the surface texture of AlSi10Mg channels using X-ray computed tomography and found profile parameters that can be used for characterizing surface texture variations. Additionally, a method for predicting the equivalent diameter of unobstructed cross-sectional area and an empirical model for predicting roughness and internal geometry were presented.
APPLIED SCIENCES-BASEL
(2021)
Article
Engineering, Electrical & Electronic
Shuang Liu, Weihang Zhang, Jincheng Zhang, Xiufeng Song, Yinhe Wu, Dazheng Chen, Shengrui Xu, Shenglei Zhao, Yue Hao
Summary: A high-electron-mobility transistor (HEMT) with AlN/GaN superlattice (SL) channel has been successfully demonstrated on a silicon substrate, achieving high performance with optimized breakdown voltage and output current. The trap states in the AlN/GaN SL channel were investigated, revealing a reduction in trap state density in the parasitic channel and specific energy levels in the main channel. This study represents a significant advancement in the development of SL channel HEMTs on cost-effective silicon substrates and provides a novel technology for high output current in AlGaN multichannel devices.
IEEE TRANSACTIONS ON ELECTRON DEVICES
(2021)
Article
Polymer Science
Hau-Ren Yang, Yen-Yu Chen, Han-Sheng Sun, Shih-Huang Tung, Shou-Ling Huang, Po-Chia Huang, Jey-Jau Lee, Yu-Ying Lai
Summary: Random incorporation of two types of pyrenes into P(NDI2OD-T2) affects the polymer's order and crystal structure through different mechanisms, thus influencing the charge transport properties of organic field-effect transistors (OFETs).
Article
Engineering, Electrical & Electronic
Yinhe Wu, Weihang Zhang, Jincheng Zhang, Shenglei Zhao, Jun Luo, Xiaohong Tan, Wei Mao, Chunfu Zhang, Yachao Zhang, Kai Cheng, Zhihong Liu, Yue Hao
Summary: This study reports on Au-free complementary metal oxide semiconductor (CMOS) transistors compatible with AlGaN-channel high-electron-mobility transistors (HEMTs) on a silicon substrate with 2-kV forward and reverse blocking voltages. By using the Schottky-drain technique, the breakdown voltages of conventional AlGaN-channel HEMTs are significantly increased, reaching up to 1980 V, with the highest power figure-of-merit (FOM) of 397MW/cm(2) for all GaN-based reverse-blocking HEMTs on silicon.
IEEE TRANSACTIONS ON ELECTRON DEVICES
(2021)
Article
Engineering, Electrical & Electronic
Antoine Chanuel, Yveline Gobil, Chuan Lun Hsu, Matthew Charles, Marianne Coig, Jerome Biscarrat, Francois Aussenac, Nicolas Defrance, Christophe Gaquiere, Fred Gaillard, Erwan Morvan
Summary: This study introduces a new contact technology for high-frequency transistors in the Ka-band, showing advantages such as low contact resistance and high breakdown voltage, and explores a new breakdown mechanism. Experimental results demonstrate that silicon implantation has a certain influence on improving breakdown voltage.
IEEE TRANSACTIONS ON ELECTRON DEVICES
(2022)
Article
Engineering, Electrical & Electronic
Toshiyuki Oishi, Kaito Ito
Summary: GaN HEMTs show great potential on semiinsulating GaN substrates, but the trap concentration in the substrate affects their performance. Proper buffer and back-barrier structures can effectively reduce drain leakage current and improve transient response.
JOURNAL OF COMPUTATIONAL ELECTRONICS
(2021)
Article
Environmental Sciences
Piotr Cienciala, Marwan A. Hassan
WATER RESOURCES RESEARCH
(2016)
Article
Geography, Physical
P. Cienciala, G. B. Pasternack
Article
Fisheries
Piotr Cienciala, Marwan A. Hassan
CANADIAN JOURNAL OF FISHERIES AND AQUATIC SCIENCES
(2018)
Article
Geography, Physical
Piotr Cienciala, Andrew D. Nelson, Andrew D. Haas, Zewei Xu
Article
Fisheries
Katherine K. Strailey, Ryan T. Osborn, Rafael O. Tinoco, Piotr Cienciala, Bruce L. Rhoads, Cory D. Suski
Summary: This study investigates how restoration structures, simulated by cylinders in three orientations, alter the energetics and swimming stability of smallmouth bass. The results show that these structures benefit fish energetically by providing smoother gait and reducing energy expenditure, especially at high flow velocities. Restoration structures may be most beneficial in stream systems with consistently high velocities, informing restoration efforts on where structures can provide the greatest energetic benefits for fish.
CANADIAN JOURNAL OF FISHERIES AND AQUATIC SCIENCES
(2021)
Article
Geography, Physical
Piotr Cienciala, Mishel Melendez Bernardo, Andrew D. Nelson, Andrew D. Haas
Summary: This study analyzed sediment yield estimates and sources in a forested mountain basin in the inland Pacific Northwest, generating three key conclusions. Firstly, the mean specific yield of clastic sediment was estimated to be 51 Mg km(-2) a(-1), among the highest for inland basins in northwestern North America. Secondly, the sediment source analysis suggested anthropogenic disturbances as an important factor influencing sediment yield. Lastly, the partitioning procedure revealed that bedload constituted approximately a third of the total clastic load exported from the basin.
Article
Geography, Physical
A. Securo, C. Del Gobbo, L. Rettig, S. Pillon, A. De Luca, D. Fontana, E. Benedetti Fasil, R. R. Colucci
Summary: Small glaciers in temperate mountain regions have experienced significant reduction and unprecedented melt rates in recent years. Some glaciers have transitioned from clean ice to debris-covered or even rock glaciers. This study examines the surface elevation change of the Popera Alto glacier in the Sesto Dolomites using LiDAR and Structure from Motion surveys, and analyzes its evolution in terms of surface cover and geomorphic processes. The glacier has lost an average of 0.35 m water equivalent per year over the past 16 years, with active modification of its surface cover by geomorphic processes. The role of debris and local topography feedback has allowed the resilience of the glacier, leading to a marked difference between the current environmental equilibrium line altitude (envELA) and the effective ELA (effELA) of the glacier.
Article
Geography, Physical
Zhenzhen Yan, Yaolin Shi, Lili Kang, Xiangtao Fan
Summary: This study proposes a quantitative regional deformation model based on global positioning system (GPS) data to quantitatively analyze the morphological evolution of rivers in the Three Rivers Region. It finds that tectonic deformation phases significantly control regional landscape development and drainage features.
Article
Geography, Physical
Said Mukhtar Ahmad, Nitheshnirmal Sadhasivam, Mona Lisa, Luigi Lombardo, Mustafa Kemal Emil, Amira Zaki, Cees J. Van Westen, Islam Fadel, Hakan Tanyas
Summary: In this study, we investigated a large slow-moving landslide in Northern Pakistan, using Interferometric Synthetic Aperture Radar (InSAR) analysis. Our results showed that the crown of the landslide is moving faster than the surrounding regions, while the footslope experienced high deformations. We discussed the possible roles of meteorologic and anthropogenic factors in causing these deformations.
Article
Geography, Physical
Shuang Bian, Xibin Tan, Yiduo Liu, Suoya Fan, Junfeng Gong, Chao Zhou, Feng Shi, Michael A. Murphy
Summary: The Yarlung River's drainage divide is primarily moving north due to variations in precipitation across the Himalayas. The Gangdese drainage divide shows predominantly northward and southward migration, controlled by base-level rise and downstream influences. The presence of north-trending rifts separates the drainage divides into five zones, each with a distinct migration pattern.
Article
Geography, Physical
Joon-Young Park, Seok Yoon, Deuk-Hwan Lee, Seung-Rae Lee, Hwan-Hui Lim
Summary: This study developed a multiple-regression model to estimate site-specific average growth rates of debris flow events. The proposed model was validated through a case study and showed reasonable predictions of debris flow velocities and heights.
Article
Geography, Physical
Nicholas Reilly Mccarroll, Arnaud Temme
Summary: New geochronological data from hillslope boulder armor in the Flint Hills reveal the rates and timing of lateral retreat in the landscape. Surfaces of limestone boulders dating back to the Pleistocene era were found, and the ages of the hillslope armor increased with distance from the limestone bench. The estimated rate of lateral retreat in this landscape is 0.02 mm/yr.
Article
Geography, Physical
Xinbo Yao, Yuntao Tian
Summary: By studying the Longmenshan-Minshan drainage divide, we found that it has reached a dynamic steady state, indicating a balance between erosion and rock uplift. This study also reveals the process of formation and evolution of the divide and raises questions about the effectiveness of divide migration metrics.
Article
Geography, Physical
Junhui Yu, Pin Yan, Yanlin Wang, Guangjian Zhong, Changliang Chen
Summary: The seafloor mounds in the Chaoshan Depression of the South China Sea are identified as mud volcanoes, with fluids coming from underlying mud-fluid diapirs. The hydrocarbon gases feeding the mud volcanoes and diapirs are reasoned to originate from deep Mesozoic source rocks, indicating significant Mesozoic hydrocarbon potential in the Chaoshan Depression.
Article
Geography, Physical
Marius Huber, Luc Scholtes, Jerome Lave
Summary: This paper investigates the relationships between hillslope stability and fabric anisotropy of brittle rock materials and the implications for landscape shaping. It explores the different stability modes and movement characteristics of anisotropic materials, and demonstrates the significant control of material anisotropy on landscape shaping.
Article
Geography, Physical
Shubhra Sharma, Anil D. Shukla
Summary: The study investigates the relationship between glacial dynamics and lake sedimentation during the mid-Holocene climate variability in the Southern Zanskar ranges. It utilizes geomorphological disposition, elemental geochemistry, and optical chronology of relict lake sediment to reconstruct the pattern of minor glacier responses to climate variability. The results indicate six centennial to millennial-scale climatic phases, with warmer phases represented by decreased mineralogical fine grain flux and increased coarse grain flux. The study highlights the potential of relict lake sediment and para/peri-glacial landforms in understanding glacial dynamics and climate change during the Holocene.
Article
Geography, Physical
Jean-Francois Bernier, Sydney W. Meury, Patrick Lajeunesse
Summary: In this study, an approach combining various data and observation methods was proposed to improve the monitoring of landfast ice dynamics and its geomorphic impact on sedimentary systems. The results demonstrate the ability of the approach to accurately measure interannual variations in landfast ice and constrain geomorphic changes. Additionally, the study found a strong relationship between the severity of freezing seasons and the response of landfast ice to hydrometeorological events, with different geomorphic responses observed under different winter conditions.
Article
Geography, Physical
Heping Shu, Fanyu Zhang
Summary: This study investigates the relationship between susceptibility of soil-water hazards and human activities, geoheritage sites in the Loess Plateau, China. Landslide and gully erosion susceptibility were obtained using gradient boosting and support vector machines, and a hazard matrix was formed to couple landslide and gully erosion susceptibility. The study found different trends in the magnification times of soil-water hazards chain under different scenarios.
Article
Geography, Physical
Guangqiang Qian, Zhuanling Yang, Xuegang Xing, Zhibao Dong, Youyuan Guo
Summary: Granule ripples are aeolian landforms armored against erosion by coarse grains. This study investigates their seasonal morphological evolution and migration in the Sanlongsha Dune Field. The findings show that wind events, especially those exceeding the threshold velocities of coarse grains, significantly influence the morphodynamics of granule ripples. The study highlights the importance of considering the reptation and saltation of coarse grains in future research on granule ripples.