海洋科学2016，Vol.40Issue(6)：89-94,6.DOI:10.11759//hykx20150217001
基于浊度计和 ADCP 的悬沙浓度估计与分析
Reliability analysis of suspended sediment concentration es-timated using an ADCP and a turbidity meter
摘要
Abstract
Turbidity and suspended sediment concentration (SSC) exhibit a good linear relationship, while the rela-tionship between the intensity of acoustic backscatter (ABS) and SSC shows a monotonic increase. In this paper, at an offshore continuous observation fixed-point, an acoustic Doppler current profiler (ADCP) was used to estimate the SSC. Turbidity and ADCP echo intensity values were collected during a tidal cycle over half a month and ana-lyzed by correlation. The reliability of an SSC inversion model using acoustic backscatter intensity was discussed for neap and spring tides. The SSC inversion process took into account the impact of nonspherical spreading in the near field of the acoustic transducer as well as background noise. Here the analysis of the data from these field ex-periments showed that during the spring tide, the concentration and composition of the suspended sediments were affected by tidal ranges and currents. In other words, the particle size of the suspended sediment changed dramati-cally during the spring tide, which impacted the SSC and ABS correlation. However, during the neap tide, the parti-cle size distribution of the suspended sediment remained stable. Therefore, SSC can be determined using ADCP acoustic backscatter.关键词
声学多普勒流速剖面仪/浊度/悬沙浓度/后向散射声强Key words
ADCP/turbidity/suspended sediment concentration/acoustic backscatter分类
海洋科学引用本文复制引用
李晓龙,陈永华,姜静波,倪作涛,刘庆奎,徐永平,涂登志,李思忍..基于浊度计和 ADCP 的悬沙浓度估计与分析[J].海洋科学,2016,40(6):89-94,6.基金项目
国家自然科学基金项目(61505221):中国科学院战略性先导科技专项(XDA11040306)@@@@[Foundation：National Natural Science Foundation of China, No.61505221:Strategic Priority Research Program of the Chinese Academy of Sciences, No.XDA11040306] （61505221）
