Analysis on SSC of Fine-Grained Sediment Flocs by In Situ Spectral Characteristics in the Yangtze Estuary

2012 ◽  
Author(s):  
Jiang Cheng ◽  
Wei Pan
Keyword(s):  
Spectral Characteristics ◽  
Yangtze Estuary ◽  
The Yangtze Estuary ◽  
Fine Grained

scholarly journals A study of in-situ sediment flocculation in the turbidity maxima of the Yangtze Estuary

2017 ◽  
Vol 191 ◽  
pp. 1-9 ◽  
Author(s):  
Chao Guo ◽  
Qing He ◽  
Leicheng Guo ◽  
Johan C. Winterwerp
Keyword(s):  
Yangtze Estuary ◽  
The Yangtze Estuary

In situ nitrogen removal processes in intertidal wetlands of the Yangtze Estuary

2020 ◽  
Vol 93 ◽  
pp. 91-97 ◽  
Author(s):  
Cheng Liu ◽  
Lijun Hou ◽  
Min Liu ◽  
Yanling Zheng ◽  
Guoyu Yin ◽  
...  
Keyword(s):  
Nitrogen Removal ◽  
Yangtze Estuary ◽  
The Yangtze Estuary ◽  
Intertidal Wetlands ◽  
Removal Processes

scholarly journals Removal of Cu, Zn, Pb, and Cr from Yangtze Estuary Using thePhragmites australisArtificial Floating Wetlands

2017 ◽  
Vol 2017 ◽  
pp. 1-10 ◽  
Author(s):  
Xiaofeng Huang ◽  
Feng Zhao ◽  
Gao Yu ◽  
Chao Song ◽  
Zhi Geng ◽  
...  
Keyword(s):  
Heavy Metals ◽  
Heavy Metal Contamination ◽  
Yangtze Estuary ◽  
Contaminated Sites ◽  
Plant Tissues ◽  
The Yangtze Estuary ◽  
Soil Resources ◽  
Copper Zinc ◽  
Floating Wetlands

Contamination of heavy metals would threaten the water and soil resources; phytoremediation can be potentially used to remediate metal contaminated sites. We constructed thePhragmites australisartificial floating wetlands outside the Qingcaosha Reservoir in the Yangtze Estuary. Water characteristic variables were measured in situ by using YSI Professional Pro Meter. Four heavy metals (copper, zinc, lead, and chromium) in both water and plant tissues were determined. Four heavy metals in estuary water were as follows: 0.03 mg/Kg, 0.016 mg/Kg, 0.0015 mg/Kg, and 0.004 mg/Kg. These heavy metals were largely retained in the belowground tissues ofP. australis. The bioaccumulation (BAF) and translation factor (TF) value of four heavy metals were affected by the salinity, temperature, and dissolved oxygen. The highest BAF of each metal calculated was as follows: Cr (0.091 in winter) > Cu (0.054 in autumn) > Pb (0.016 in summer) > Zn (0.011 in summer). Highest root-rhizome TF values were recorded for four metals: 6.450 for Cu in autumn, 2.895 for Zn in summer, 7.031 for Pb in autumn, and 2.012 for Cr in autumn. This indicates that theP. australisAFW has potential to be used to protect the water of Qingcaosha Reservoir from heavy metal contamination.

A Study of Turbulent Shear Stress on Fine-Grained Suspended Sediment Flocs Size in the Yangtze Estuary

2013 ◽  
Vol 353-356 ◽  
pp. 2720-2723 ◽  
Author(s):  
Jiang Cheng ◽  
Wei Pan ◽  
Pan Jun Du
Keyword(s):  
Shear Stress ◽  
Suspended Sediment ◽  
Sediment Concentration ◽  
High Energy ◽  
Yangtze Estuary ◽  
Turbulent Shear ◽  
The Yangtze Estuary ◽  
Fine Grained ◽  
Turbulent Shear Stress ◽  
Tidal Data

During the two surveys at both spring and neap tides in wet (July-August 2008) season, measurements of flow, turbulence, suspended sediment concentration (SSC), fine-grained sediment particle mean diameter (Dm) were carried out over 26 h that covered two M2 semidiurnal cycles in the middle north channel of the Yangtze estuary. The preliminary observations data show complex temporal and seasonal variation in estuarine flocculation of fine-grained sediment. In the high-turbidity and high-energy area of the Yangtze estuary, the flocculation processes indicate that the turbulence shear stress maybe the most important factor to the fine-grained sediment flocculation processes during the spring and neap tide cycle change. There exists a turning point of flocs Dm vs. turbulent shear stress. The neap tidal critical turbulent shear stress is around 0.1 Nm-2, much smaller that the spring tidal data of about 0.5 Nm-2.

ZOOPLANKTON DISTRIBUTION AND VARIATION IN THE YANGTZE ESTUARY AND ITS ADJACENT WATERS IN SUMMER AND AUTUMN

2010 ◽  
Vol 33 (6) ◽  
pp. 1219-1225 ◽  
Author(s):  
Fei-Yan ZHANG ◽  
Jing-Liang TANG ◽  
Dao-Ji LI ◽  
Tao FANG ◽  
Biao WANG
Keyword(s):  
Yangtze Estuary ◽  
The Yangtze Estuary ◽  
Zooplankton Distribution

How Artefacts Do Leadership: A Ventriloquial Analysis

2021 ◽  
pp. 089331892199807
Author(s):  
Jonathan Clifton ◽  
Fernando Fachin ◽  
François Cooren
Keyword(s):  
Organizational Communication ◽  
Recent Work ◽  
Distributed Leadership ◽  
Network Theory ◽  
Actor Network Theory ◽  
Fine Grained ◽  
Naturally Occurring ◽  
Human Actors

To date there has been little work that uses fine-grained interactional analyses of the in situ doing of leadership to make visible the role of non-human as well as human actants in this process. Using transcripts of naturally-occurring interaction as data, this study seeks to show how leadership is co-achieved by artefacts as an in-situ accomplishment. To do this we situate this study within recent work on distributed leadership and argue that it is not only distributed across human actors, but also across networks that include both human and non-human actors. Taking a discursive approach to leadership, we draw on Actor Network Theory and adopt a ventriloquial approach to sociomateriality as inspired by the Montreal School of organizational communication. Findings indicate that artefacts “do” leadership when a hybrid presence is made relevant to the interaction and when this presence provides authoritative grounds for influencing others to achieve the group’s goals.

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