| Title |
Correlation Analysis of Signal to Noise Ratio (SNR) and Suspended Sediment Concentration (SSC) in Laboratory Conditions |
| Authors |
서강현(Seo, Kanghyeon) ; 김동수(Kim, Dongsu) ; 손근수(Son, Geunsoo) |
| DOI |
https://doi.org/10.12652/Ksce.2017.37.5.0775 |
| Keywords |
실내실험조건;부유사;신호대잡음비;수평초음파도플러유속계;레이저부유사측정기 Laboratory condition;SSC;SNR;H-ADCP;LISST-100X |
| Abstract |
Monitoring sediment flux is crucial especially for maintaining river systems to understand morphological behaviors. Recently, hydroacoustic backscatter (or SNR) as a surrogate to empirically estimate suspended sediment concentration has been increasingly highlighted for more efficient acquisition of sediment dataset, which is difficult throughout direct sediment sampling. However, relevant contemporary researches have focused on wide range solution applicable for large natural rivers where H-ADCPs with relatively low acoustic frequency have been widely utilized to seamlessly measure streamflow discharge. In this regard, this study aimed at investigating hydroacoustical characteristics based on a very recently released H-ADCP (SonTek SL-3000) with high acoustic frequency of 3 MHz in order to capitalize its capacity to be applied for suspended sediment monitoring in laboratory conditions. SL-3000 was tested in a laboratory flume to collect SNR in conjunction with LISST-100X for actual sediment concentration and particle distribution in both sand and silt sediment injection in various amount. Conventional algorithms to correct signal attenuations for water and sediment were carefully tested to validate whether they can be applied for SL-3000. As result of analyzing the SNR-SSC correlation trand, through further study in the future, it is confirmed that SSC can be observed indirectly by using the SNR. |