Estimation of suspended sediment concentrations using Pulse-coherent Acoustic Doppler Profiler (PCADP)  

作　　者：柏秀芳 李思忍 龚德俊 徐永平 姜静波 

机构地区：[1]Institute of Oceanology,Chinese Academy of Sciences,R&D Centre of Ocean Environmental Engineering and Technology [2]Qingdao Feiyang Vocational & Technical College

出　　处：《Chinese Journal of Oceanology and Limnology》2009年第2期260-265,共6页中国海洋湖沼学报（英文版）

基　　金：Supported by National High Technology Research and Development Program of China (863 Program, No. 2008AA09Z113)

摘　　要：The objective of the study is to investigate the suitability of using Pulse-coherent Acoustic Doppler Profiler (PCADP) to estimate suspended sediment concentration (SSC). The acoustic backscatter intensity was corrected for spreading and absorption loss, then calibrated with OBS and finally converted to SSC. The results show that there is a good correlation between SSC and backscatter intensity with R value of 0.74. The mean relative error is 22.4%. Then the time span of little particle size variation was also analyzed to exclude the influence of size variation. The correlation coefficient increased to 0.81 and the error decreased to 18.9%. Our results suggest that the PCADP can meet the requirement of other professional instruments to estimate SSC with the errors between 20% and 50%, and can satisfy the need of dynamics study of suspended particles.The objective of the study is to investigate the suitability of using Pulse-coherent Acoustic Doppler Profiler （PCADP） to estimate suspended sediment concentration （SSC）. The acoustic backscatter intensity was corrected for spreading and absorption loss, then calibrated with OBS and finally converted to SSC. The results show that there is a good correlation between SSC and backscatter intensity with R value of 0.74. The mean relative error is 22.4%. Then the time span of little particle size variation was also analyzed to exclude the influence of size variation. The correlation coefficient increased to 0.81 and the error decreased to 18.9%. Our results suggest that the PCADP can meet the requirement of other professional instruments to estimate SSC with the errors between 20% and 50%, and can satisfy the need of dynamics study of suspended particles.

关 键 词：Doppler Profiler （PCADP） suspended sediment concentration （SSC） acoustic backscatterintensity 

分 类 号：P733.23[天文地球—物理海洋学]