Time Series Analyses of Suspended Sediment Concentrations at North Inlet, South Carolina

Estuaries ◽  
1989 ◽  
Vol 12 (4) ◽  
pp. 211 ◽  
Author(s):  
L. R. Gardner ◽  
L. Thombs ◽  
D. Edwards ◽  
D. Nelson
Keyword(s):  
Time Series ◽  
South Carolina ◽  
Suspended Sediment ◽  
North Inlet ◽  
Suspended Sediment Concentrations ◽  
Time Series Analyses

scholarly journals Estimating suspended sediment concentrations using a broadband ADCP in Mahshahr tidal channel

2011 ◽  
Vol 8 (4) ◽  
pp. 1601-1630 ◽  
Author(s):  
P. Ghaffari ◽  
J. Azizpour ◽  
M. Noranian ◽  
V. Chegini ◽  
V. Tavakoli ◽  
...  
Keyword(s):  
Time Series ◽  
Suspended Sediment ◽  
Suspended Particle ◽  
Acoustic Doppler Current Profiler ◽  
Monitoring Method ◽  
Asymmetric System ◽  
Promising Tool ◽  
Suspended Sediment Concentrations ◽  
Current Profiler ◽  
The Persian Gulf

Abstract. Data sets of Acoustic Doppler Current Profiler (ADCP) backscatter intensities (ABS) were used to evaluate suspended sediment concentrations (SSC) in the Mahshahr Channel (MC) of the Persian Gulf. Since the echo intensity is closely related to turbidity in water, the ADCP may be a promising tool to monitor the sediment transport. The low susceptibility of the acoustic backscatter to bio-fouling and the ADCP provision of current profiles as well as sediment time series makes this monitoring method more advantageous compared with the traditional methods. Time series of ADCP backscatter intensity profiles were used for improving temporal resolution of SSC estimates. Backscatter and traditional observational data were separated into two segments. The first part was utilized for calibrating the backscatter data and attributing the intensity to suspended particle concentrations and using the second part acoustic intensities were validated. Acoustic based SSC estimates are slightly underestimated in comparison with traditional water sample based SSC values, but still there is good agreement between acoustic SSC and traditional observations. Results illustrate a rather high correlation between lab based and acoustic based particles in suspension (R2 = 88 %). Additionally measurements reveal the domination of a semidiurnal ebb asymmetric system in the MC. Tidal currents provide the main energy source for particle resuspension and transport. Maximum suspended load concentrations are evident in ebb tides, while the currents strengths are enough to refloat loads from the bed. In general spring tides show higher SSC values compared with neap tides in the study area.

scholarly journals Using Satellite Remote Sensing to Study the Effect of Sand Excavation on the Suspended Sediment in the Hong Kong-Zhuhai-Macau Bridge Region

Water ◽  
2021 ◽  
Vol 13 (4) ◽  
pp. 435
Author(s):  
Fenfen Liu ◽  
Tonghui Zhang ◽  
Haibin Ye ◽  
Shilin Tang
Keyword(s):  
Remote Sensing ◽  
Time Series ◽  
Hong Kong ◽  
Suspended Sediment ◽  
River Estuary ◽  
Pearl River Estuary ◽  
Pearl River ◽  
The Pearl River Estuary ◽  
Suspended Sediment Concentrations ◽  
The Pearl River

The Hong Kong-Zhuhai-Macau Bridge crosses the Pearl River Estuary and is the largest bridge and tunnel project in the world. During the construction period of this project, the excessive suspended sediment was found in the construction region. The suspended sediment generated by sand excavation in the upstream was assumed to have a significant impact on the suspended sediment in the tunnel region. In this study, we assessed the impact of upstream sand excavation on the suspended sediment in the Hong Kong-Zhuhai-Macau Bridge construction area using Landsat OLI, ETM+, and TM data. Regional suspended sediment algorithms were developed for Landsat using a symbolic regression method based on data from in situ measurements in the study area from 2003 to 2014. A band shift was conducted on the remote sensing reflectance data from Landsat ETM+ and OLI to produce a time series of the suspended sediment concentrations that was internally consistent with that of the Landsat TM data. The suspended sediment distribution was extracted and used to compare under two different conditions, with and without sand excavation. The correlations of the time series of the suspended sediment concentrations in different regions in the surrounding waters, including the correlations between the construction regions and the sand excavation regions, were calculated. Our results indicated that the sand excavation north of the Pearl River Estuary had a limited impact on the surface suspended sediment concentrations in the Hong Kong-Zhuhai-Macau Bridge tunnel area.

Time‐series analyses of firearm‐related Google searches and U.S. suicide rates 2004–2016

2021 ◽  
Author(s):  
Daniel W. Capron ◽  
Rita Andel ◽  
Martin Voracek ◽  
Benedikt Till ◽  
Thomas Niederkrotenthaler ◽  
...  
Keyword(s):  
Time Series ◽  
Suicide Rates ◽  
Time Series Analyses
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