Estimation of suspended sediment concentration from Acoustic Doppler Current Profiler (ADCP) instrument: A case study of Lembeh Strait, North Sulawesi

3rd International Symposium on LAPAN-IPB Satellite For Food Security and Environmental Monitoring 2016

地球科学;轻工业;生态环境科学

Dwinovantyo, Angga^1 ; Manik, Henry M.^2 ; Prartono, Tri^2 ; Susilohadi^3 ; Ilahude, Delyuzar^3

Graduate School of Marine Technology, PMDSU Program Batch II, Bogor Agricultural University, Bogor

16680, Indonesia^1

Department of Marine Science and Technology, Faculty of Fisheries and Marine Science, Bogor Agricultural University, Bogor

16680, Indonesia^2

Marine Geological Institute, Bandung, Indonesia^3

关键词: Acoustic doppler current profiler;    Advanced technology;    Confidence interval;    Conventional techniques;    Laboratory analysis;    Simple linear regression analysis;    Suspended sediment concentrations;    Temporal resolution;   

Others  :  https://iopscience.iop.org/article/10.1088/1755-1315/54/1/012082/pdf
DOI  :  10.1088/1755-1315/54/1/012082

学科分类：环境科学（综合）

来源: IOP

【 摘 要 】

Measurement of suspended sediment concentration (SSC) is one of the parameters needed to determine the characteristics of sediment transport. However, the measurement of SSC nowadays still uses conventional technique and it has limitations; especially in temporal resolution. With advanced technology, the measurement can use hydroacoustic technology such as Acoustic Doppler Current Profiler (ADCP). ADCP measures the intensity of backscatter as echo intensity unit from sediment particles. The frequency of ADCP used in this study was 400 kHz. The samples were measured and collected from Lembeh Strait, North Sulawesi. The highest concentration of suspended sediment was 98.89 mg L-1and the lowest was 45.20 mg L-1. Time series data showed the tidal condition affected the SSC. From the research, we also made correction from sound signal losses effect such as spherical spreading and sound absorption to get more accurate results by eliminating these parameters in echo intensity data. Simple linear regression analysis at echo intensity measured from ADCP to direct measurement of SSC was performed to obtain the estimation of the SSC. The comparison result of estimation of SSC from ADCP measurements and SSC from laboratory analyses was insignificantly different based on t-test statistical analysis with 95% confidence interval percentage.