Comparison of Acoustic to Optical Backscatter Continuous Measurements of Suspended Sediment Concentrations and Their Characterization in an Agriculturally Impacted River

Sirabahenda, Zacharie; St‐Hilaire, André; Courtenay, Simon C.; Heuvel, Michael R. van den

doi:10.3390/w11050981

Cited by 11 publications

(7 citation statements)

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“…In order to transform the equality constrained optimization issue into the unconstrained optimization, Lagrangian multipliers µ 1 , µ 2 and µ 3 need to be introduced. According to Equation (24), the Lagrangian function f (N,r 2 1 , r…”

Section: Velocity Estimation Accuracy Priority (Veap) Waveform Optimization Methodsmentioning

confidence: 99%

“…Acoustic Doppler current profiler (ADCP) is a popular Doppler sonar used for measuring water velocity and profile discharge in natural and human-made waterways. Due to the advantages of high estimation accuracy, multiple measurement parameters and low measurement cost, the ADCP has been widely used in the fields of hydrological survey, water resources exploration, underwater protection and navigation [1][2][3][4][5], etc. For example, 98% of United States Geological Survey (USGS) non-wading river discharge measurements were performed by ADCP in 2013 [6].…”

Section: Introductionmentioning

confidence: 99%

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Dynamic Optimization Method for Broadband ADCP Waveform with Environment Constraints

Yang

Fang

2021

Sensors

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Broadband acoustic Doppler current profiler (ADCP) is widely used in agricultural water resource explorations, such as river discharge monitoring and flood warning. Improving the velocity estimation accuracy of broadband ADCP by adjusting the waveform parameters of a phase-encoded signal will reduce the velocity measurement range and water stratification accuracy, while the promotion of stratification accuracy will degrade the velocity estimation accuracy. In order to minimize the impact of these two problems on the measurement results, the ADCP waveform optimization problem that satisfies the environment constraints while keeping high velocity estimation accuracy or stratification accuracy is studied. Firstly, the relationship between velocity or distance estimation accuracy and signal waveform parameters is studied by using an ambiguity function. Secondly, the constraints of current velocity range, velocity distribution and other environmental characteristics on the waveform parameters are studied. For two common measurement applications, two dynamic configuration methods of waveform parameters with environmental adaptability and optimal velocity estimation accuracy or stratification accuracy are proposed based on the nonlinear programming principle. Experimental results show that compared with the existing methods, the velocity estimation accuracy of the proposed method is improved by more than 50%, and the stratification accuracy is improved by more than 22%.

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Section: Velocity Estimation Accuracy Priority (Veap) Waveform Optimization Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Dynamic Optimization Method for Broadband ADCP Waveform with Environment Constraints

Yang

Fang

2021

Sensors

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“…Numerous comparisons of acoustic and optical methods are available. For instance, Hawley investigated acoustic and optical sensors in a lake environment [34], Patino and Byrne estimated the SSC using an ABS and a turbidimeter, and moreover, performed a sensitivity analysis as well (regarding, e.g., salinity and temperature) [35], Vousdoukas et al, tested various OBS sensors and an Acoustic Doppler Velocimeter (ADV) instrument for nearshore processes [36], Sirabahenda et al, used an ADCP and a turbidity probe in an agriculturally impacted river [37]. However, studies with a thorough comparative analysis of more than two indirect methods applied parallel, in a fluvial context, based on a large number of samples, can scarcely be found.…”

Section: Consideration Of Indirect Methods For the Comparative Assessmentioning

confidence: 99%

Comparative Assessment of Fluvial Suspended Sediment Concentration Analysis Methods

Pomázi

Baranya

2020

Water

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The monitoring of fluvial suspended sediment transport plays an important role in the assessment of morphological processes, river habitats, or many social activities associated with river management. However, establishing and operating a well-functioning sediment monitoring system requires the involvement of advanced indirect methods. This study investigates the advantages and limitations of optical and acoustic devices, to quantify the uncertainties and provide a comprehensive comparative assessment of the investigated indirect methods. The novelty of this study, compared to previous ones, is that four different indirect techniques are parallel tested, i.e., the laser diffraction based LISST-Portable|XR, an infrared based optical instrument, the VELP TB1 turbidimeter, the acoustic based LISST-ABS (Acoustical Backscatter Sensor) sensor, and a 1200 kHz Teledyne RD Instruments Acoustic Doppler Current Profiler (ADCP). The calibration of all the indirect methods was performed based on more than 1000 samples taken from the Hungarian section of the Danube River within a wide suspended sediment concentration range. Implementing a comparative assessment of the different sediment analysis methods, a qualitative and quantitative characterisation of the applicability is provided. Furthermore, a proposal for an optimised sediment monitoring methodology is also suggested.

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“…Some scholars have explored changes in ecological functions of watersheds in terms of natural factors and the effects of land use and land cover changes on hydrological conditions of watersheds, such as the frequency and severity of floods in watersheds, baseflow, flow, and degree of soil erosion [ 28 ]. Another important aspect is climatic factors, where climate change brings changes in precipitation, which in turn affects the water cycle [ 29 ], thus changing the flow path time, peak flow, flow volume, and sand production [ 30 , 31 ]. Shang Haiyang [ 32 ] used ecological compensation policy as an opportunity to assess the impact of ecological compensation policy on economic development in the basin.…”

Section: Introductionmentioning

confidence: 99%

Spatial and Temporal Evolution and Prediction of the Coordination Level of “Production-Living-Ecological” Function Coupling in the Yellow River Basin, China

Zhang

Wang

et al. 2022

IJERPH

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To clarify the evolution of “production-living-ecological” function coupling in the Yellow River Basin, coordinating the spatial allocation of resources, development management and layout optimization, is an important means for achieving ecological protection and high-quality development in the region. In this paper, we conducted an empirical analysis and ARIMA prediction of the coupled production-living-ecological function coordination level in the Yellow River Basin of China from 2008 to 2018, and found that: (1) In terms of temporal evolution, the production-living-ecological function and coupling coordination level of each province and region in the Yellow River Basin generally shows a sharp and then slow upward trend, with the living functions changing more than the production and ecological functions; (2) in terms of spatial pattern, the production and living functions of each province and region show the trend of functional level increasing from east to west over time; the ecological functions, contrary to production and living functions, show a “high-low” aggregation, midstream shows “low-low” aggregation, and downstream shows “low-high” aggregation; (3) According to the regression results of the spatial Dubin model, the environmental governance level, technological research and development level, and social security level and resource dependence degree have positive promoting and spillover effects on the coupling coordination level of the “production-living-ecological” function in the region. However, population density and carbon emission intensity will hinder the development of regional coupling coordination level; (4) from the ARIMA prediction, the coupling coordination level of “production-living-ecological” in the Yellow River Basin continues the development trend of 2008–2018 in the short term, the overall coordination level is at a high level, and the variability of coupling coordination level among provinces and regions is further reduced. Finally, corresponding development countermeasures and suggestions are given to different provinces and regions based on the spatial and temporal evolution characteristics, influencing factors and development trend of the “production-living-ecological” function in the Yellow River basin.

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Comparison of Acoustic to Optical Backscatter Continuous Measurements of Suspended Sediment Concentrations and Their Characterization in an Agriculturally Impacted River

Cited by 11 publications

References 50 publications

Dynamic Optimization Method for Broadband ADCP Waveform with Environment Constraints

Dynamic Optimization Method for Broadband ADCP Waveform with Environment Constraints

Comparative Assessment of Fluvial Suspended Sediment Concentration Analysis Methods

Spatial and Temporal Evolution and Prediction of the Coordination Level of “Production-Living-Ecological” Function Coupling in the Yellow River Basin, China

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