| Title |
Estimation of Suspended Sediment Concentration in Small Stream with Acoustic Backscatter from Horizontal ADCP based on Real-Scale Field Experiment |
| Authors |
서강현(Seo, Kanghyeon) ; 김동수(Kim, Dongsu) ; 손근수(Son, Geunsoo) |
| DOI |
https://doi.org/10.12652/Ksce.2016.36.6.1023 |
| Keywords |
부유사농도;신호대잡음비;초음파 산란도;수평초음파도플러유속계;레이저입도분석기 Suspended sediment concentration;SNR;Backscatter;H-ADCP;LISST |
| Abstract |
Suspended sediment concentration (SSC) is a crucial riverine parameter in terms that it can be utilized for analyzing sediment transport, stability assessment of river and structure and so on. However, in case of domestic, sediment discharge data are not enough because of using conventional sediment samplers. This study aimed at developing a practical technique for estimating suspended sediment concentration in high spatial and temporal resolution by building relationship between acoustic backscatter (or SNR) from H-ADCP with actually observed data using LISST-100X. In this regard, a dedicated correction algorithm was proposed particularly for the adapted H-ADCP (SonTek SL-3000). Then, a SNR-SSC relation was built based upon a real-scale field experiment, where both H-ADCP and LISST-100X were concurrently operated to observe SNR and SSC, respectively. The coefficient of determination for the developed regression equation of SNR-SSC relation was around 0.85~0.88, thereby the relation could be evaluated to be highly correlated. The result of this study might be potentially applied for real-time and simultaneous observation of SSC when H-ADCP could be applied. |