Sediment characteristics of the Yangtze River during major flooding

Liu, Xiu Juan; Kettner, Albert J.; Cheng, Jun; Dai, Shenghong A.

doi:10.1016/j.jhydrol.2020.125417

Cited by 21 publications

(8 citation statements)

References 44 publications

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“…As a result, the Changjiang River discharge in July 2016 was much higher than that in July 2015 (CWRC, 2017). It had been shown that the flood events in the Changjiang River Basin can greatly influence the sediment fluxes that are transported outward (X. J. Liu, et al., 2020). The CDW extension areas in the Changjiang River Estuary and the adjacent ECS shelf area were larger in July 2016 than those in July 2015 (Figure 1d vs.…”

Section: Discussionmentioning

confidence: 99%

“…The chemical and biological regimes, as well as the composition and status of the local marine ecosystems in these areas, are also under the influence of large terrestrial outputs and intensive human activities (Qin & Shen, 2019; X. Zhang, et al., 2021; Yang et al., 2020). Weather and ecological variables (such as typhoons, river basin floods, and algal blooms) also influence marine ecosystems and biogeochemical cycling (Lü et al., 2020; X. J. Liu, et al., 2020; Y. Wang, et al., 2021).…”

Section: Introductionmentioning

confidence: 99%

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New Insights Into the Non‐Conservative Behaviors of Nutrients Triggering Phytoplankton Blooms in the Changjiang (Yangtze) River Estuary

Wang

Gao

2022

JGR Oceans

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Four research cruises were carried out during March and July in 2015 and 2016 in the Changjiang (Yangtze) River Estuary and the adjacent shelf. Nutrient concentrations (regarded as static parameters) were measured in the surface and bottom waters collected at 86–99 stations over the course of these cruises. In addition, unfiltered seawater samples were incubated onboard for 48 hr to measure the potential change rates of nutrients (regarded as dynamic parameters). These parameters can help directly elucidate non‐conservative behaviors of nutrients in order to determine whether seawater serves as a source or a sink. Large nutrient sinks (with more negative variation rates) were consistently found at the surface during the two July cruises at the stations just along the outside edge of the turbidity maximum zone near the mouth of the river. Negative rates, although with much smaller magnitudes, were also found in most bottom water samples in July and at both the surface and bottom in March. The high net nutrient uptake rates at the surface in the summer triggered bloom events later at the seaward stations, showing that high net nutrient uptake is the cause and high chlorophyll‐a is the consequence of the bloom. Such information about biogeochemical cycling of nutrients and the mechanisms and development of bloom events occurring in large river estuarine and coastal areas could not have been obtained if these static and dynamic parameters had not been studied together.

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Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

New Insights Into the Non‐Conservative Behaviors of Nutrients Triggering Phytoplankton Blooms in the Changjiang (Yangtze) River Estuary

Wang

Gao

2022

JGR Oceans

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“…Lithostratigraphic analyses can be highly diagnostic of overbank flood events with changes in the grain-size of minerogenic sediments, usually coarsening due to high discharge energy [39,45,119,[136][137][138][139][140][141][142][143][144][145][146], and exogenic clastic layers within organic sediment profiles indicating sudden changes in depositional regime [147][148][149]. Finer-grained, sorted and well-bedded layers often represent fluvial slackwater deposits [38,43,75,140,[150][151][152][153][154][155][156][157][158][159][160].…”

Section: Recognition Of Past Hydrological Changesmentioning

confidence: 99%

“…High-intensity flooding has also occurred regularly in the last two centuries [35,156,289], and floods in the 19th and 20th centuries have been as bad as any in the last 1500 years. As recently as 1889, 1954 and 1998, the greatest magnitude floods have been recorded in both the mid-and lower Yangtze [146,160,168,220,290,291], with flood deposits of the 1998 event widespread [119]. The EASM rain belt has moved southwards in recent decades, bringing heavy rains and floods to the lower Yangtze [221,292,293], such as the extreme rainfall there in 2015 [219].…”

Section: Yangtze Floodsmentioning

confidence: 99%

“…There were, however, periods of exception to this stable norm when major floods did occur. [146] 1321 T-1 [336] 1350 Longnan [337] 1500-1400 Dianshan [81] 1514 D2 [327] 1700 Taihu plain [332] 1710-1414 Qingpu [313] 2500 Yushan [98] 2540 YZ-1 [327] 2651 Taihu plain [332] 3110-2818 Dongjing [52] 3177-3111 Taihu plain [332] 3630 Dongjing [52] 3657-3639 Guoyuancun [303] 3795-3710 Baiwaitan [52] 4291 Maoshan [149] 4464 Banxiangchan [52] 4577 Liangzhu (LZ-1) [273] 4620 Wuguishan [338] 4630 Yangxi [30] 4700 HB3 [339] 4886 Hemudu [188] 4924-4603 Luojiang [5,311] 4940-4620 Yushan [340] 4903 Taihu plain [332] 5129-4346 Liangzhu (LZ-4) [273] 5175 Jingtoushan [341] 5200-5000 Tianluoshan [11] 5326 Yaojiang [25] 5386 Shisanzuqiao [332] 5434-5347 Tiaoxi valley [1] 5445 Xiaofengyang [52] 5517 Fengjing [52] 5680 Wuguishan [338] 5815 Hemudu [342] 6255 Jingtoushan [341] 6350-6200 Hemudu [178] 6470-6255 Wujincheng [52] 6494 Yaojiang [177] 6509 Jingtoushan [341] 6650-6500 Xinjie [221]<...>…”

Section: Terrestrialisation and Peat Formationmentioning

confidence: 99%

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History of Mid- and Late Holocene Palaeofloods in the Yangtze Coastal Lowlands, East China: Evaluation of Non-Pollen Palynomorph Evidence, Review and Synthesis

Innés

Zong

2021

Quaternary

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The surface of the lowland deltaic plain around Taihu (Lake Tai), south of the Yangtze river mouth in eastern China, lies near sea level and until recent drainage and development by human societies was mostly covered by wetlands of various types. It was created by regular overbank flooding, mainly from the Yangtze, and the deposition of mostly mineral sediments over the several millennia since sea level regained its current altitude in the early mid-Holocene and progradation of the Yangtze delta began. Fluvial activity has therefore been the dominant influence on sedimentation in the Taihu lowlands, and in the lower Yangtze valley generally, and has determined the character of the mainly inorganic sediment sequences that have accumulated there, with autochthonous deposition of organic sediments within the local wetland plant communities playing a minor role. The presence of both clastic flood horizons and peat layers within the deposits of the Taihu plain attests to great variability in the magnitude of fluvial input from the Yangtze, with repeated extreme floods occurring at some periods, but with periods when the growth of peat layers shows low water tables, little exogenic sediment input and so little fluvial influence. We have examined the published evidence for these different depositional environments in the lower Yangtze and the Taihu plain during the Holocene, comparing the flood history with the middle and upper reaches of the Yangtze catchment. Discrete phases of high or low flooding influence are recognised, and these correspond with large-scale Holocene climate history. Intensified human land use in recent millennia has complicated this relationship, amplifying the flooding signal. Our palynological research shows that algal microfossil type and abundance is a useful proxy for changing water depth and quality in the aquatic environments of the Holocene Taihu wetlands, and can recognise flooding events that are not registered in the floodplain lithological sequences.

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Flood modeling and fluvial dynamics: A scoping review on the role of sediment transport

Hamidifar,

Nones,

Rowinski

2024

Earth-Science Reviews

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Sediment characteristics of the Yangtze River during major flooding

Cited by 21 publications

References 44 publications

New Insights Into the Non‐Conservative Behaviors of Nutrients Triggering Phytoplankton Blooms in the Changjiang (Yangtze) River Estuary

New Insights Into the Non‐Conservative Behaviors of Nutrients Triggering Phytoplankton Blooms in the Changjiang (Yangtze) River Estuary

History of Mid- and Late Holocene Palaeofloods in the Yangtze Coastal Lowlands, East China: Evaluation of Non-Pollen Palynomorph Evidence, Review and Synthesis

Flood modeling and fluvial dynamics: A scoping review on the role of sediment transport

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