An integrated optic and acoustic (IOA) approach for measuring suspended sediment concentration in highly turbid environments

Lin, Jia Chun; He, Qing; Guo, Leicheng; Prooijen, Bram C. van; Wang, Zheng Bing

doi:10.1016/j.margeo.2019.106062

Cited by 15 publications

(24 citation statements)

References 57 publications

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“…Continuous in situ measurements are possible with acoustic or optical instruments [Fettweis et al, 2019]. Optical backscatter sensors have been used successfully to measure suspended sediment in a wide range of environments, from estuaries and embayments [Lunven and Gentien, 2000;Green et al, 2000;Bass et al, 2002;Fugate and Friedrichs, 2002;Bass et al, 2007;Li et al, 2018;Fettweis et al, 2019;Lin et al, 2020] to mud flats and salt marshes [Voulgaris and Meyers, 2004;Guo et al, 2018] to sandy beaches [Downing et al, 1981;Aagaard et al, 2002]. Acoustic backscatter sensors have also been successfully used to measure suspended sediment in many different coastal and estuarine settings [Thorne et al, 1993;Green et al, 2000;Fugate and Friedrichs, 2002;Voulgaris and Meyers, 2004;Hoitink and Hoekstra, 2005;Bass et al, 2007;Chanson et al, 2008;Li et al, 2018;Lin et al, 2020] and beyond [Hill et al, 2003;Hawley, 2004].…”

Section: Introductionmentioning

confidence: 99%

Characterizing the Composition of Sand and Mud Suspensions in Coastal and Estuarine Environments Using Combined Optical and Acoustic Measurements

et al. 2021

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Quantifying and characterizing suspended sediment is essential to successful monitoring and management of estuaries and coastal environments. To quantify suspended sediment, optical and acoustic backscatter instruments are often used. Optical backscatter systems are more sensitive to mud particles (< 63µm) and flocs, whereas acoustic Accepted ArticleThis article is protected by copyright. All rights reserved.Confidential manuscript submitted to JGR-Oceans allows us to estimate whether there are more sand or mud particles floating through the water. The relationship between "seeing" and "hearing" can be described in a single number, the sediment composition index (SCI). We successfully tested this approach in laboratory experiments and then applied it to a site on the coast of the Netherlands. This approach gives us a new way to understand environments that are both sandy and muddy.

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Section: Introductionmentioning

confidence: 99%

Characterizing the Composition of Sand and Mud Suspensions in Coastal and Estuarine Environments Using Combined Optical and Acoustic Measurements

et al. 2021

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“…Then, the measured optical turbidity decreases with increasing concentration. Thus, the same optical turbidity value corresponds to two different quantities of particles, which is a severe ambiguity drawback [ 27 ].…”

Section: Resultsmentioning

confidence: 99%

“…On a single modal particle suspension, its performance exceeds the one of standard optical and acoustic backscattering. As such, on known suspensions, TROT might overcome the recently developed instrumentation combining acoustical and optical information as described by Agrawal et al [ 32 ] or Lin et al [ 27 ].…”

Section: Discussionmentioning

confidence: 99%

Comparison of Time Resolved Optical Turbidity Measurements for Water Monitoring to Standard Real-Time Techniques

Pallarès

Schmitt

Uhring

2021

Sensors

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Environmental water monitoring requires the estimation of the suspended solids load. In this paper, we compare the concentration range accessible through three different techniques: optical turbidity, acoustic backscattering and the newly in-lab developed time resolved optical turbidity. We focus on their comparison on measurements made in the laboratory on water suspensions of known particles and concentrations. We used laboratory grade kieselguhr, wheat starch and kaolin as suspended solid surrogates. The explored concentration domains are the ones, for the total suspended solid load, commonly encountered in wastewater and rivers in standard (less than 1 g/L to a few g/L) or extreme conditions such as floods or storm events (up to several dozen g/L). Regarding the operable concentration domain, the time resolved optical turbidity shows a clear advantage upon the other methods, whatever the kind of particle is.

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“…10.1029/2020JC016927 3 of 21 and dry seasons (Li et al, 2016;Liu et al, 2011;Shi, 2004). The near-bottom SSC, however, may exceed 10 kg/ m 3 (see Figure 1, Lin et al, 2019) and even reach 100 kg/m 3 (Wan et al, 2014). Mixing and stratification periodically varies with the strength of river flow and tidal flow, leading to flood-ebb, spring-neap and seasonal variations (Li et al, 2016(Li et al, , 2018Pu et al, 2015;Shi, 2004;Wu et al, 2012).…”

Section: Study Areamentioning

confidence: 99%

“…Positive u indicates the flood direction. See Lin et al., (2019) for details.…”

Section: Introductionmentioning

confidence: 99%

Effects of Sediment‐Induced Density Gradients on the Estuarine Turbidity Maximum in the Yangtze Estuary

et al. 2021

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Many estuaries have regions with locally elevated suspended sediment concentration (SSC), which are referred to as an Estuarine Turbidity Maximum (ETM) (Dyer, 1986;Schubel, 1968). ETMs are areas with a convergence of sediment transport, often corresponding to the landward limit of salt intrusion. With high SSCs, the ETMs lead to dynamic bed behavior and may influence tidal propagation through damping of turbulence (Burchard & Baumert, 1998;Geyer, 1993;Talke & Jay, 2020). Understanding the dynamics of ETMs is important for the management of navigation channels, freshwater resources and ecosystem services.ETMs reflect trapping of sediment in the longitudinal direction, often as a result of (at least one of) two main mechanisms: Tidal asymmetry and estuarine circulation. Tidal asymmetry is the distortion of the tidal wave resulting from non-linear interactions between the tide and channel morphology (

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An integrated optic and acoustic (IOA) approach for measuring suspended sediment concentration in highly turbid environments

Cited by 15 publications

References 57 publications

Characterizing the Composition of Sand and Mud Suspensions in Coastal and Estuarine Environments Using Combined Optical and Acoustic Measurements

Characterizing the Composition of Sand and Mud Suspensions in Coastal and Estuarine Environments Using Combined Optical and Acoustic Measurements

Comparison of Time Resolved Optical Turbidity Measurements for Water Monitoring to Standard Real-Time Techniques

Effects of Sediment‐Induced Density Gradients on the Estuarine Turbidity Maximum in the Yangtze Estuary

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