Article
Environmental Sciences
Jiarui Qi, Yige Jing, Chao Chen, Jinfeng Zhang
Summary: This paper utilizes the FVCOM-SWAN wave-current-sediment model to simulate the tidal current, wave, and suspended sediment concentration (SSC) in the sea area near Weifang Port, China. By introducing a modified sediment-settling-velocity formula, the SSCs calculated by the modified model are shown to be closer to the measured data compared to the original model. The results indicate that the modified model can effectively describe the hydrodynamic characteristics and sediment movement in the study area.
Article
Environmental Sciences
Rong Zhang, Yongping Chen, Peixiong Chen, Xin Zhou, Biying Wu, Kehao Chen, Zhilin Sun, Peng Yao
Summary: Reclamation of tidal flats is a common method used in coastal areas to expand land area and develop the economy. This study investigates the impacts of reclamation on tidal and suspended sediment dynamics using numerical modeling in the Oufei tidal flat at the Wenzhou coast. The results show that reclamation reduces the tidal flat area, weakens tidal currents, and reduces suspended sediment concentration. The construction of the Oufei dike also alters sediment circulation and enhances landward sediment transport inside the estuary. The findings of this study can be used as a reference for analyzing suspended sediment transport in other sites affected by tidal flat reclamation.
FRONTIERS IN MARINE SCIENCE
(2023)
Article
Geosciences, Multidisciplinary
Sophie Defontaine, Isabel Jalon-Rojas, Aldo Sottolichio, Nicolas Gratiot, Cedric Legout
Summary: An optical settling column was used to study the settling velocity of suspended matter in the Garonne Tidal River. The study found time and space variability in settling velocity, ranging from 0.018 to 0.268 mm/s. The settling velocity was influenced by resuspension, deposition, advection, and the presence of estuarine turbidity maxima (ETM).
Article
Geosciences, Multidisciplinary
Chien-Yung Tseng, Rafael O. Tinoco
Summary: A two-layer, turbulence-based model was developed to predict suspended sediment concentration profiles in emergent vegetated flows. The model takes into account turbulence generated from vegetation, bed, and coherent structures caused by stem-bed-flow interaction to calculate the effective bed shear velocity.
GEOPHYSICAL RESEARCH LETTERS
(2021)
Article
Oceanography
Yue Yu, Deqi Xiong, Zhixin Qi, Wenxin Li, Ruiyang Sun, Sinan Fu
Summary: Understanding the interaction between oil droplets and suspended particulate matter is crucial for sunken oil modeling and emergency response. This study investigated the effects of mixing time and energy, oil type, and sediment concentration and size on the properties of oil-particle aggregates (OPAs). The results showed that high mixing energy resulted in higher oil and particle loads in OPAs. Under turbulent hydrodynamics, moderately viscous oils formed OPAs more easily and sank rapidly. Higher sediment concentration increased the density and oil capacity of OPAs.
JOURNAL OF GEOPHYSICAL RESEARCH-OCEANS
(2022)
Article
Engineering, Marine
Ju Huang, Rui Yuan, Jianrong Zhu
Summary: This study used a three-dimensional sediment numerical model to investigate the water and sediment transport in Hangzhou Bay. The results showed that in summer, there were southward and westward flows from the Changjiang Estuary, with stronger intensity during the spring tide. The bottom water and sediment transport patterns were similar to the surface patterns. In winter, the transport patterns were similar to those in summer but weaker.
JOURNAL OF MARINE SCIENCE AND ENGINEERING
(2022)
Article
Mechanics
Antoine Mathieu, Zhen Cheng, Julien Chauchat, Cyrille Bonamy, Tian-Jian Hsu
Summary: This paper presents two-phase flow simulations of oscillatory sheet flow experiments involving medium and fine sand using a turbulence-resolving two-fluid model. The results show that the turbulence-resolving model can reproduce the observed differences in behavior between medium and fine sand, while turbulence-averaged models require tuning of empirical coefficients for turbulence-particle interactions. The analysis confirms that the unsteady effects in fine sand are not only due to the settling velocity of particles, but also influenced by flow instabilities, solid-phase Reynolds stress, and turbulence attenuation caused by the presence of particles.
JOURNAL OF FLUID MECHANICS
(2022)
Article
Engineering, Marine
Zhiguo He, Baoxin Xu, Samuel Ukpong Okon, Li Li
Summary: In this study, the generation and maintenance of sediment hyperpycnal flow in the Yellow River Estuary were investigated using a numerical model. The results showed that high suspended sediment concentration and tidal cycles are important factors in the formation and characteristics of the hyperpycnal flow.
JOURNAL OF MARINE SCIENCE AND ENGINEERING
(2022)
Article
Environmental Sciences
Chenguang Liu, Suhua Fu, Zhanbin Li, Zeyu Zhang, Jianhui Zeng
Summary: The transport of sediments plays a vital role in soil erosion, and accurately calculating sediment transport capacity is crucial for constructing soil erosion process models. Previous research has primarily focused on the dynamics of individual sediment particles and hydraulic variables, with limited studies on the impact of soil aggregates on sediment transport capacity (Tc). In this study, flume experiments were conducted to investigate the effects of sediment characteristics, including single particles and aggregates, on the Tc of overland flow without raindrop import. The results showed that the correlation between measured Tc and sediment mechanical composition indexes was weak. However, the settling velocity of sediment with aggregates showed a significant correlation with Tc. New equations were established, taking into account the settling velocity with aggregates (uud75), slope gradient, and unit discharge, which exhibited improved prediction accuracy for Tc. Additionally, a new equation incorporating flow and sediment properties obtained through dimensional analysis outperformed the empirical model derived in this study. These findings highlight the importance of sediment settling velocity in predicting sediment transport capacity of overland flow.
INTERNATIONAL SOIL AND WATER CONSERVATION RESEARCH
(2023)
Article
Environmental Sciences
Jian Zhao, Yang Li, Xinjie Wang, Xinghui Xia, Enxiang Shang, Jawad Ali
Summary: This study found that under high NaCl concentrations, suspended sediment can promote the settling of PVP-AgNPs, while the dissolved organic matter in suspended sediment can reduce the dissolution of AgNPs, significantly influencing the fate of AgNPs.
ENVIRONMENTAL POLLUTION
(2021)
Article
Environmental Sciences
Wenfei Jia, Yujun Yi
Summary: This study presents a numerical model that analyzes the sediment distribution and erosion-accretion patterns in the Yellow River Estuary (YRE) during the water-sediment regulation scheme (WSRS). The results show that WSRS effectively changes the sediment distribution and erosion condition in the YRE.
FRONTIERS IN MARINE SCIENCE
(2023)
Article
Engineering, Environmental
Yu-Ying Huang, Christina W. Tsai
Summary: Eddies have different impacts on the motion of particles within the turbulence boundary layer depending on their length and velocity scales. Attached eddies, particularly the type-A eddies directly attached to the wall, play a significant role in the turbulent kinetic energy and Reynolds shear stresses in the turbulence boundary layer. This study combines the attached eddies hypothesis with the stochastic diffusion particle tracking model to simulate the transport of suspended sediment particles under the influence of attached eddies.
STOCHASTIC ENVIRONMENTAL RESEARCH AND RISK ASSESSMENT
(2023)
Article
Geography, Physical
Marc Pezerat, Xavier Bertin, Thibault Coulombier
Summary: The driving mechanisms of sediment transport across the upper shoreface have been poorly examined to date due to lack of field measurements. This study investigated cross-shore suspended sediment transport in a macro-tidal and low-sloping shoreface using synchronized time series of bottom pressure, current velocity, and suspended sediment concentration. The analysis revealed that steady currents dominate suspended transport, with a notable contribution of wave-driven return currents under storm wave conditions.
EARTH SURFACE PROCESSES AND LANDFORMS
(2023)
Article
Environmental Sciences
Z. Safar, C. Chassagne, S. Rijnsburger, M. Ibanez Sanz, A. J. Manning, A. J. Souza, T. van Kessel, A. Horner-Devine, R. Flores, M. McKeon, J. D. Pietrzak
Summary: This study conducted a survey using different monitoring techniques in the Rhine-ROFI region to classify and characterize suspended particles. The results showed the presence of highly anisotropic particles leading to multiple peaks in the particle size distributions. By combining different techniques, meaningful particle size distributions and size information were obtained.
FRONTIERS IN MARINE SCIENCE
(2022)
Article
Engineering, Mechanical
Koeli Ghoshal, Punit Jain, Rafik Absi
Summary: In this study, a one-dimensional unsteady suspended sediment transport model considering hindered settling and mixing length effects has been developed. The resulting highly nonlinear partial differential equation has been solved numerically using generalized boundary conditions and validated against existing works and laboratory data.
JOURNAL OF ENGINEERING MECHANICS
(2022)
Article
Geosciences, Multidisciplinary
Xiao Wu, Houjie Wang, Naishuang Bi, Jeffrey A. Nittrouer, Jingping Xu, Shuai Cong, Brandee Carlson, Taian Lu, Zhaoying Li
Article
Oceanography
Ping Yuan, Houjie Wang, Xiao Wu, Naishuang Bi
JOURNAL OF OCEAN UNIVERSITY OF CHINA
(2020)
Article
Environmental Sciences
Xiao Wu, Houjie Wang, Naishuang Bi, Jingping Xu, Jeffrey A. Nittrouer, Zuosheng Yang, Taian Lu, Peihua Li
Summary: This study highlights the impacts of the Water-Sediment Regulation Scheme (WSRS) on the lower Yellow River system, showing that artificial floods have significantly altered the volume and grain size patterns of transported sediment. The changes have led to high sediment loads over a shorter time frame and coarsening of the river channel, causing a shift from recession to progradation in the Yellow River delta and rapid burial of terrestrial organic carbon and pollutants.
WATER RESOURCES RESEARCH
(2021)
Article
Environmental Sciences
Quantao Zhu, Peng Li, Zhenhong Li, Sixun Pu, Xiao Wu, Naishuang Bi, Houjie Wang
Summary: This study combined optical and Synthetic Aperture Radar (SAR) satellite remote sensing images to analyze the spatiotemporal changes of the Yellow River Delta coastline from 1980 to 2020, demonstrating the significant impact of sediment discharge on coastline changes.
Article
Oceanography
Xiting Liu, Mingyu Zhang, Anchun Li, Daidu Fan, Jiang Dong, Chaoqun Jiao, Xin Chang, Yu Gu, Kaidi Zhang, Houjie Wang
Summary: This study investigates the preservation of carbon and sulfur in estuary and shelf sediments, finding that the C/S ratio can effectively differentiate between freshwater and marine environments. It suggests a new mechanism for the influence of physical factors on carbon and sulfur preservation, providing valuable insights into sediment diagenesis related to the global biogeochemical cycle.
CONTINENTAL SHELF RESEARCH
(2021)
Article
Geosciences, Multidisciplinary
Naishuang Bi, Houjie Wang, Xiao Wu, Yoshiki Saito, Congliang Xu, Zuosheng Yang
Summary: The modern Huanghe Delta used to be the most rapid land-building delta in the world, but its evolution has been affected by a decrease in sediment load from the Huanghe in recent decades. This study used bathymetric data and Landsat imagery to study the spatiotemporal evolution of the delta, revealing distinct patterns in the evolution of the active lobe and the abandoned lobe. The evolution of the active lobe was influenced by sediment load, hydrodynamic-morphologic interactions, and grain size of the sediment, while changes in sediment dispersals dominated the evolution of the abandoned lobe.
Article
Geosciences, Multidisciplinary
Shuai Cong, Xiao Wu, Jianzhong Ge, Naishuang Bi, Yunhai Li, Jian Lu, Houjie Wang
Summary: The study using a high-resolution model revealed that sediment dynamics on the East China Sea inner shelf showed significant asymmetry during the passage of Typhoon Chan-hom, leading to sediment resuspension and transport towards the southwest direction. The research also found that the typhoon disrupted the coastal upwelling in summer, enhancing cross-shelf sediment transport.
Article
Environmental Sciences
Jingbo Chen, Ming Liu, Naishuang Bi, Yadi Yang, Xiao Wu, Dejiang Fan, Houjie Wang
Summary: The study found that the transport of heavy metals is significantly controlled by hydrological processes, mainly in particulate form, closely related to particle size and suspended sediment concentration. Heavy metals mainly originate from the upper and middle reaches of the Yellow River, but are also influenced by human emissions in downstream areas. Downstream areas play an important role as a sink in the process of heavy metal input into the sea, acting as a significant buffer and filter.
SCIENCE OF THE TOTAL ENVIRONMENT
(2021)
Article
Environmental Sciences
Canran Tu, Peng Li, Zhenhong Li, Houjie Wang, Shuowen Yin, Dahui Li, Quantao Zhu, Maoxiang Chang, Jie Liu, Guoyang Wang
Summary: This study proposed a synergistic classification method combining hyperspectral and radar imagery for wetland mapping, achieving an overall accuracy of 97% and demonstrating the effectiveness of this fusion approach. The synergy of polarimetric SAR and hyperspectral imagery enables high-resolution wetland classification, offering potential for providing accurate and temporally detailed wetland classification results in different regions.
Article
Environmental Sciences
Jie Liu, Peng Li, Canran Tu, Houjie Wang, Zhiwei Zhou, Zhixuan Feng, Fang Shen, Zhenhong Li
Summary: This study investigates the spatiotemporal coherence change in the coastal wetlands of the Yellow River Delta using synthetic aperture radar (SAR) images. The results show that the temporal baseline has a significant impact on coherence, and a synergetic classification method combining SAR coherence, backscatter intensity, and optical images outperforms single-source data or other algorithms.
Article
Environmental Sciences
Maoxiang Chang, Peng Li, Zhenhong Li, Houjie Wang
Summary: The article introduces a new method using Sentinel-2 imagery and Google Earth Engine to generate a tidal flat map for the Bohai and Yellow Seas. The map covers a time span from October 1, 2020, to October 31, 2021, with an overall accuracy of 94.55% and a total area of 546,360.2 hectares. This updated tidal flat map can facilitate policy-making and provide insights into the responses of tidal flats to natural and human disturbance.
Article
Environmental Sciences
Maoxiang Chang, Peng Li, Yue Sun, Houjie Wang, Zhenhong Li
Summary: This study proposes a method for extracting TMZ in the Yellow River estuary using time series remote sensing images and GEE, and systematically investigates the distribution, variation, and regulation mechanisms of TMZ. The results show that there are clear seasonal and decadal variations in TMZ in the Yellow River estuary, which are influenced by morphology, currents, wind speeds, and seawater stratification.
Article
Environmental Sciences
Xueshi Sun, Limin Hu, Xiang Sun, Dejiang Fan, Ming Liu, Houjie Wang, Zuosheng Yang, Peng Cheng, Xiaohang Liu, Zhigang Guo
Summary: This study reveals that the Eastern China Marginal Seas (ECMS) are one of the largest reservoirs of mercury (Hg) in the global Hg cycle and play a dominant role in regulating the oceanic Hg cycle and budgets.
GLOBAL BIOGEOCHEMICAL CYCLES
(2023)
Article
Engineering, Electrical & Electronic
Peng Li, Guoyang Wang, Cunren Liang, Houjie Wang, Zhenhong Li
Summary: This article examines the contribution of local land subsidence (LLS) in the Yellow river delta (YRD) to relative sea level rise (SLR) and the risk of coastal flooding. It proposes a method to estimate coastal inundation by combining radar interferometry (InSAR)-derived LLS and SLR. The study reveals that LLS contributes significantly to flood risk in the YRD, with subsiding areas exceeding 50 mm/yr and rates reaching over 300 mm/yr. Under different greenhouse gas emissions scenarios, the research presents inundation scenarios and highlights the urgent need for mitigation measures to prevent future coastal flooding.
IEEE JOURNAL OF SELECTED TOPICS IN APPLIED EARTH OBSERVATIONS AND REMOTE SENSING
(2023)
Article
Engineering, Electrical & Electronic
Peng Li, Zhenhong Li, Keren Dai, Yasir Al-Husseinawi, Wanpeng Feng, Houjie Wang
Summary: The study presents an iterative method to generate high-resolution TanDEM-X DEMs and assesses vertical accuracy in China, showing remarkable elevation quality in coastal areas but weaker accuracies in steep mountainous areas. The TanDEM-X DEM performs better than other global DEMs overall, with low topographic error contribution in mountainous and coastal areas.
IEEE JOURNAL OF SELECTED TOPICS IN APPLIED EARTH OBSERVATIONS AND REMOTE SENSING
(2021)