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
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
Geography, Physical
Lin Liu, Houjie Wang, Zuosheng Yang, Yongyong Fan, Xiao Wu, Limin Hu, Naishuang Bi
Summary: This study investigates the temporal-spatial variations in the grain size of sediments from the Huanghe delta coast and reveals the key factors and environmental significance of sediment variability. The results show that the sediments have become coarser in recent years, which has significant implications for the evolution of river deltas and carbon-related biogeochemical processes.
Article
Environmental Sciences
Andrew J. Moodie, Jeffrey A. Nittrouer, Hongbo Ma, Brandee N. Carlson, Yuanjian Wang, Michael P. Lamb, Gary Parker
Summary: This study demonstrates that sediment concentration may influence the magnitude and pattern of vertical density stratification through sampling and measurement under different flow conditions in the lower reach of the Yellow River. The importance lies in the understanding of the vertical density stratification phenomenon in natural river flows, which can improve sediment transport models and provide guidance for ecological environmental management and flood protection measures in rivers.
WATER RESOURCES RESEARCH
(2022)
Article
Environmental Sciences
Weiming Xie, Jianwei Sun, Leicheng Guo, Fan Xu, Xianye Wang, Hongyu Ji, Yaoshen Fan, Zheng Bing Wang, Qing He
Summary: Coastal tidal flats are important ecosystems, but they are highly vulnerable to tidal dynamics, sea-level rise, and human activities. This study examined the hydrodynamics, sediment transport, and morphological changes on two tidal flats in the Yellow River Delta with different tidal regimes. The results showed that longer inundation periods under diurnal tides led to more sediment deposition, while semi-diurnal tides resulted in increased wave impact and tidal flat erosion due to lower water depths. These findings highlight the joint role of tidal regime and powerful waves in controlling sediment availability and tidal flat evolution. This has implications for managing erosion and restoring vegetation in the Yellow River Delta.
FRONTIERS IN MARINE SCIENCE
(2023)
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, Civil
Siyoon Kwon, Il Won Seo, Siwan Lyu
Summary: This study investigated the mixing of suspended sediment at the confluence of the Hwang and Nakdong Rivers in South Korea using high-resolution hyperspectral data. The spectral characteristics of suspended sediment were analyzed, and the suspended sediment concentration (SSC) was retrieved using a cluster-based machine learning regression technique. The results showed that the hyperspectral approach can provide detailed information on the mixing of suspended sediment in complex river systems.
JOURNAL OF HYDROLOGY
(2023)
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
Environmental Sciences
Liang Zhou, Yang Yang, Yong Shi, Xiaomei Xu, Ya Ping Wang, Jianjun Jia, Jian Hua Gao, Shu Gao
Summary: This study investigates the temporal changes in sedimentary organic carbon in the northern Yangtze River subaqueous delta over the past 2000 years. The results show that the variations in terrestrial organic carbon inputs are mainly controlled by the East Asian summer monsoon and human activities. However, the decreased inputs after 1385 CE are significantly affected by the increased contribution of sediment from the Huanghe River.
FRONTIERS IN MARINE SCIENCE
(2022)
Article
Environmental Sciences
Yulong Guo, Chao Li, Chenyu Wang, Juan Xu, Chenyang Jin, Shouye Yang
Summary: The sediment routing system of the Huanghe River has changed significantly, with a decrease in material contribution from the Songpan-Ganzi Block and an increase in local underlying basement rocks, as well as an increasing contribution from the Chinese Loess Plateau and proximal North China Craton basement. This reflects a response to human impacts on sediment routing processes and warrants further research on the effects of altered sediment routing systems on river sediment geochemistry in the face of increasing anthropogenic impacts.
WATER RESOURCES RESEARCH
(2021)
Article
Environmental Sciences
Jianying Liu, Da-Wei Li, Yang Ding, Tiantian Ge, Weifang Chen, Chih-An Huh, Meixun Zhao
Summary: This study found that the relocation of the Huanghe outlet reduced the transport of terrestrial organic carbon to the southern Yellow Sea, leading to a decrease in terrigenous source contributions to sedimentary organic carbon. However, after 1950 AD, the contribution of terrestrial organic carbon to sedimentary organic carbon increased, possibly due to increased contributions from the old Huanghe delta erosion and Korean rivers.
FRONTIERS IN MARINE SCIENCE
(2022)
Article
Engineering, Civil
Jinlong Hu, Chiyuan Miao, Xiangping Zhang, Dongxian Kong
Summary: The study proposes a new method called HGAR that combines remote sensing technology and machine learning for the retrieval of river suspended sediment concentrations (SSCs). Through experiments conducted in the lower Yellow River, the results demonstrate that the proposed HGAR method outperforms other retrieval methods in terms of accuracy, generalizability, and robustness. Additionally, the HGAR method successfully captures key information and has higher flexibility compared to traditional statistical models.
JOURNAL OF HYDROLOGY
(2023)
Article
Geosciences, Multidisciplinary
Preston Spicer, Kimberly Huguenard, Kelly L. Cole, Daniel G. MacDonald, Michael M. Whitney
Summary: This study utilized microstructure profiling to investigate vertical mixing in the interior Merrimack River plume during a tidal pulse. Multiple stratified shear mixing regimes were identified and evolved with time, including plume layer mixing, nearfield interfacial mixing, and tidal interfacial mixing. The findings highlight the previously unreported tidally modulated mixing within the river plume.
GEOPHYSICAL RESEARCH LETTERS
(2022)
Article
Environmental Sciences
C. E. Renshaw, E. N. Dethier, J. D. Landis, J. M. Kaste
Summary: The input of organic matter into stream channels is an important energy source for headwater ecosystems and plays a crucial role in the global carbon cycle. The study focuses on quantifying the mobilization, transport, and storage of organic-rich fine sediment in a Strahler fourth-order stream during intermediate-sized storm events. It is found that the channel bed is consistently a source of suspended load to the channel margins, and the trapping of suspended load by riparian margins limits sediment transport distance and decouples the channel from local terrestrial organic matter exchange.
WATER RESOURCES RESEARCH
(2022)
Article
Environmental Sciences
Yin Cao, Qing Wang, Chao Zhan, Rui Li, Zhangfan Qian, Longsheng Wang, Xianbin Liu, Jun Zhu, Hongyuan Shi, Yan Li
Summary: This study focuses on the spatial and temporal evolution of tidal flats in the Yellow River Delta using tidal data and remote sensing technology. The study reveals a decreasing trend in the area of tidal flats, primarily influenced by river sediment discharges, marine hydrodynamic forces, and anthropogenic reclamation activities.
FRONTIERS IN MARINE SCIENCE
(2023)
Article
Geology
Marcello Gugliotta, Yoshiki Saito, Thi Kim Oanh Ta, Van Lap Nguyen, Andrew D. La Croix, Zhanghua Wang, Toru Tamura, Rei Nakashima, Kim Phuong Lieu
Summary: By analyzing a core dataset from the Ba Lai palaeochannel in the Mekong River Delta, this study identified and interpreted nine sedimentary facies, revealing the evolution history and sedimentation processes of the channel. The findings provide important information for better understanding tide-dominated deltaic systems and improving their interpretation in the geological record.
Article
Geosciences, Multidisciplinary
Xiao Wu, Houjie Wang, Yoshiki Saito, Jaia Syvitski, Naishuang Bi, Zuosheng Yang, Jingping Xu, Weibing Guan
Summary: Global deltas are at risk of being submerged due to a decrease in river-derived sediment. Increasing riverine sediment supply can save deltas, but it must exceed opposing forces. The release of an artificial flood from the Xiaolangdi Reservoir in China replenished sediment and created new land.
Article
Geography, Physical
S. Qiaola, T. M. L. Nguyen, T. K. O. Ta, V. L. Nguyen, M. Gugliotta, Y. Saito, H. Kitagawa, R. Nakashima, T. Tamura
Summary: This study examines the applicability of optically-stimulated luminescence (OSL) dating to wave-dominated deltas and proposes comparing different luminescence signals as an effective method to check the reliability of age estimates in environments where sunlight bleaching is not ensured.
QUATERNARY GEOCHRONOLOGY
(2022)
Article
Environmental Sciences
Yu Ma, Yoshiki Saito, Thi Kim Oanh Ta, Yue Li, Qinglu Yao, Chao Yang, Van Lap Nguyen, Marcello Gugliotta, Zhanghua Wang, Ling Chen
Summary: Limited information is available about organophosphate esters (OPEs) in sediments of the Dong Nai River System in Vietnam and the study found that human activities and fluvial-tidal interactions significantly influence the distribution of OPEs.
SCIENCE OF THE TOTAL ENVIRONMENT
(2022)
Article
Geosciences, Multidisciplinary
Xuanqi Zhao, Weiguo Zhang, Feng Wang, Quang Lan Vu, Yoshiki Saito
Summary: In this study, the sediment provenance changes in the Red River Delta, Vietnam, during the Holocene were inferred through magnetic measurement, particle size analysis, diffuse reflectance spectroscopy (DRS), and geochemical analyses. The results showed that Holocene climate change and human activities have led to variations in sediment composition. The magnetic properties, together with DRS analysis, provided insights into paleoclimate and paleoenvironmental changes in deltaic environments.
Article
Geography, Physical
Bing Song, Zhen Li, Limi Mao, Yoshiki Saito, Xiangdong Yang, Shixiong Yang
Summary: This study presents vegetation succession and climate change during 9.2-8.0 cal kyr BP based on sub-decennial scale pollen data, revealing two cold and dry events at 8.5 ka and 8.2 ka.
PALAEOGEOGRAPHY PALAEOCLIMATOLOGY PALAEOECOLOGY
(2023)
Article
Environmental Sciences
Ruihe Jin, Yue Li, Yoshiki Saito, Zhanghua Wang, Thi Kim Oanh Ta, Van Lap Nguyen, Jing Yang, Min Liu, Yan Wu
Summary: This study investigated the spatial distribution of 15 Amino accelerators and antioxidants (AAL/Os) and 5 AAO transformation products (AAOTPs) in sediments from the Dong Nai River System (DNRS) in Vietnam. The results showed higher levels of these compounds in downstream and primary tributary sediments, suggesting their cumulative sedimentation towards the estuarine region. The characteristics of the sediments, such as total organic carbon (TOC) content and grain sizes, were significantly correlated with the burdens of these compounds, indicating their preferential partitioning into fine and TOC-rich matter. This research provides valuable insights into the environmental behavior of AAL/Os and AAOTPs in Asian aquatic systems and highlights the need for further evaluation of their impacts on wildlife and public health.
ENVIRONMENTAL RESEARCH
(2023)
Article
Geography, Physical
Martin J. Head, Colin N. Waters, Jan A. Zalasiewicz, Anthony D. Barnosky, Simon D. Turner, Alejandro Cearreta, Reinhold Leinfelder, Francine M. G. McCarthy, Daniel de B. Richter, Neil L. Rose, Yoshiki Saito, Davor Vidas, Michael Wagreich, Yongming Han, Colin P. SumMerhayes, Mark Williams, Jens Zinke
JOURNAL OF QUATERNARY SCIENCE
(2023)
Article
Geosciences, Multidisciplinary
Jian Liu, Jiandong Qiu, Yoshiki Saito, Xin Zhang, Hong Wang, Feifei Wang, Lilei Chen, Gang Xu, Bin Chen, Meina Li, Yuhui An
Summary: This study provides new insights into the formation of the Holocene mud wedge along the Zhejiang-Fujian coast in East China Sea. The researchers conducted an integrated analysis of seismic profiles and borehole cores to understand the sedimentary evolution of the area since the Late Pleistocene. The study identified five major seismic units and various subunits, providing new understanding of the paleoenvironmental and paleogeographic evolution of the coastal area.
Article
Geography, Physical
Yuhui An, Xiuli Feng, Jian Liu, Yoshiki Saito, Jiandong Qiu, Xin Zhang, Hong Wang, Lilei Chen
Summary: The northern Jiangsu coastal zone (NJCZ) has developed multi-stage deltas and clinoforms due to the discharge of the Yellow and Yangtze rivers and the Huaihe River. An old clinoform, located below the old Yellow River delta (OYRD), has been studied to understand its evolution. The study used various analyses, including dating techniques, grain size measurements, isotopic analysis, and identification of sedimentary organisms.
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
Geology
Yuanyuan Chen, Bing Deng, Yoshiki Saito, Zhanghua Wang, Xiaoqiang Yang, Jiaxue Wu
Summary: High-resolution seismic data were used to study the Holocene sedimentary evolution of the Pearl River delta-estuary-shelf system. A subaqueous clinoform developed in the Holocene over the pre-Holocene incised channel/valley network. The highstand sediment displayed asymmetric accumulation within 30 m water depths, with a thicker depocenter located in western Lingdingyang Bay.
Article
Geography, Physical
Xishuang Li, Yuexia Zhao, Zuosheng Yang, Shuqing Qiao, Baohua Liu, Qiuhong Xie, Yoshiki Saito, Chenguang Liu
Summary: This study estimates the thickness and sediment budget of Holocene marine deposits in the Bohai Sea using high-resolution subbottom profiles. The average thickness of Holocene marine deposits in the Bohai Sea is approximately 7.8 m, with a maximum thickness of 28 m in Jinzhou Bay. Three deposit centers were identified, accounting for approximately 42% of the total Bohai Sea sediments.
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)
Review
Environmental Sciences
Jaia Syvitski, Juan Restrepo Angel, Yoshiki Saito, Irina Overeem, Charles J. Vorosmarty, Houjie Wang, Daniel Olago
Summary: The global sediment cycle is a critical aspect of the Earth system, but human activities and climate warming have significantly altered the sources and sinks of sediment.
NATURE REVIEWS EARTH & ENVIRONMENT
(2022)
