Combined Use of Remote Sensing and Continuous Monitoring to Analyse the Variability of Suspended-Sediment Concentrations in San Francisco Bay, California

2001 ◽  
Vol 53 (6) ◽  
pp. 801-812 ◽  
Author(s):  
C.A. Ruhl ◽  
D.H. Schoellhamer ◽  
R.P. Stumpf ◽  
C.L. Lindsay
Keyword(s):  
Remote Sensing ◽  
Suspended Sediment ◽  
San Francisco ◽  
Continuous Monitoring ◽  
San Francisco Bay ◽  
Combined Use ◽  
Suspended Sediment Concentrations

scholarly journals ACOUSTIC DOPPLER VELOCIMETER BACKSCATTER FOR QUANTIFICATION OF SUSPENDED SEDIMENT CONCENTRATION IN SOUTH SAN FRANCISCO BAY

2017 ◽  
pp. 34
Author(s):  
Mehmet Öztürk ◽  
Paul Work
Keyword(s):  
Suspended Sediment ◽  
San Francisco ◽  
San Francisco Bay ◽  
Empirical Relation ◽  
Acoustic Method ◽  
Sediment Concentration ◽  
Acoustic Doppler Velocimeter ◽  
Data Set ◽  
Suspended Sediment Concentrations ◽  
Optical Turbidity

A data set was acquired on a shallow mudflat in south San Francisco Bay that featured simultaneous, co-located optical and acoustic sensors for subsequent estimation of suspended sediment concentrations (SSC). The optical turbidity sensor output was converted to SSC via an empirical relation derived at a nearby site using bottle sample estimates of SSC. The acoustic data was obtained using an acoustic Doppler velocimeter. Backscatter and noise were combined to develop another empirical relation between the optical estimates of SSC and the relative backscatter from the acoustic velocimeter. The optical and acoustic approaches both reproduced similar general trends in the data and have merit. Some seasonal variation in the dataset was evident, with the two methods differing by greater or lesser amounts depending on which portion of the record was examined. It is hypothesized that this is the result of flocculation, affecting the two signals by different degrees, and that the significance or mechanism of the flocculation has some seasonal variability. In the earlier portion of the record (March), there is a clear difference that appears in the acoustic approach between ebb and flood periods, and this is not evident later in the record (May). The acoustic method has promise but it appears that characteristics of flocs that form and break apart may need to be accounted for to improve the power of the method. This may also be true of the optical method: both methods involve assuming that the sediment characteristics (size, size distribution, and shape) are constant

Suspended-sediment dynamics in the tidal reach of a San Francisco Bay tributary

2015 ◽  
Vol 65 (11) ◽  
pp. 1477-1488 ◽  
Author(s):  
Gregory G. Shellenbarger ◽  
Maureen A. Downing-Kunz ◽  
David H. Schoellhamer
Keyword(s):  
Suspended Sediment ◽  
San Francisco ◽  
San Francisco Bay ◽  
Sediment Dynamics ◽  
Tidal Reach

Study on the Coastal Suspended Sediment Transport Based on Multi-Source Satellite Remote Sensing Imagery

2013 ◽  
Vol 718-720 ◽  
pp. 371-376
Author(s):  
Yin Cai ◽  
Meng Guo Li ◽  
Ming Xiao Xie
Keyword(s):  
Remote Sensing ◽  
Sediment Transport ◽  
Suspended Sediment ◽  
Coastal Area ◽  
Satellite Remote Sensing ◽  
Wind Waves ◽  
Suspended Sediment Transport ◽  
Nearshore Zone ◽  
Retrieval Technique ◽  
Suspended Sediment Concentrations

Based on a series of multi-source satellite remote sensing imageries and wind parameters extracted from QuickSCAT satellite datasets, the surface suspended sediment concentrations (SSC) of the Zhuanghe coastal area, China was investigated using the retrieval technique. The results showed that the SSC of the Zhuanghe coastal area is higher in the nearshore zone, and gradually diminishes to the offshore. During the ebbing process, the range of high SSC zone is wider than that during the flooding process. This feature indicated that the suspended sediment transport is mainly determined by the ebb currents, and the sediment source comes from the nearshore shallow flats, where the sediments could be entrained by the wind waves and then diffuses offshore or alongshore with the tidal currents.

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