Estimation of suspended sediment concentrations with ADCP in Danube River

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Title:Estimation of suspended sediment concentrations with ADCP in Danube River
Creators:
Baranya, Sándor; baranya at vit dot bme dot hu; Water Management Research Group of the Hungarian Academy of Sciences, Department of Hydraulic and Water Resources Engineering, Budapest University of Technology and Economics, Muegyetem rkp. 3, H-1111, Budapest, Hungary.
Jóusa, János; Water Management Research Group of the Hungarian Academy of Sciences, Department of Hydraulic and Water Resources Engineering, Budapest University of Technology and Economics, Muegyetem rkp. 3, H-1111, Budapest, Hungary.
Journal or Publication Title:
Journal of Hydrology and Hydromechanics, 61, 3, pp. 232-240
Uncontrolled Keywords:Suspended sediment concentration, ADCP, Danube

Abstract

An estimation procedure for suspended sediment concentrations based on the intensity of backscattered sound of acoustic Doppler current profilers (ADCP) is introduced in this paper. Based on detailed moving and fixed boat ADCP measurements with concurrent sediment sampling, we have successfully calibrated the estimation method for a reach of River Danube in Hungary, characterized by significant suspended sediment transport. The effect of measurement uncertainty and various data filtering on sediment load determination is also analyzed and quantified. Some of the physical model parameters describing the propagation of sound in water are estimated based on known empirical formulas, while other parameters are derived from measured. Regression analysis is used to obtain a relationship between the intensity of backscattered sound and sediment concentrations. The empirical relationship has been then used to estimate the suspended sediment concentrations from the ADCP data collected in fixed and moving boat measurement operation mode, along verticals and path-lines, respectively. We show that while some measurement uncertainty is inherent to the acoustic Doppler principle, it is further enhanced by the complexity of the near-bottom sediment-laden flow. This uncertainty has then a significant effect on the local sediment load estimation. In turn, reasonable smoothing of raw velocity and backscatter intensity data shows insignificant impact on cross-sectional sediment load estimation.

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Title:Estimation of suspended sediment concentrations with ADCP in Danube River
Translated title:Estimation of suspended sediment concentrations with ADCP in Danube River
Creators:
Baranya, Sándor; baranya at vit dot bme dot hu; Water Management Research Group of the Hungarian Academy of Sciences, Department of Hydraulic and Water Resources Engineering, Budapest University of Technology and Economics, Muegyetem rkp. 3, H-1111, Budapest, Hungary.
Jóusa, János; Water Management Research Group of the Hungarian Academy of Sciences, Department of Hydraulic and Water Resources Engineering, Budapest University of Technology and Economics, Muegyetem rkp. 3, H-1111, Budapest, Hungary.
Uncontrolled Keywords:Suspended sediment concentration, ADCP, Danube
Subjects:T Technology > TA Engineering (General). Civil engineering (General)
Divisions:Mathematics, Physics and Earth Sciences > Institute of Hydrodynamics > Journal of Hydrology and Hydromechanics
Journal or Publication Title:Journal of Hydrology and Hydromechanics
Volume:61
Number:3
Page Range:pp. 232-240
ISSN:0042-790X
Publisher:Institute of Hydrology of the Slovak Academy of Sciences and the Institute of Hydrodynamics of the Academy of Sciences of the Czech Republic
Related URLs:
URLURL Type
http://avi.lib.cas.cz/node/55Publisher
ID Code:8165
Item Type:Article
Deposited On:05 Jun 2014 18:28
Last Modified:05 Jun 2014 16:28

Citation

Baranya, Sándor; Jóusa, János (2013) Estimation of suspended sediment concentrations with ADCP in Danube River. Journal of Hydrology and Hydromechanics, 61 (3). pp. 232-240. ISSN 0042-790X

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