论文部分内容阅读
用声学设备探测水体中悬浮泥沙浓度及其变化的关键问题是对观测数据进行标定。通过分析在长江口海域现场观测得到的声学后向散射强度数据和水样泥沙实测值，提出了三种将声学观测数据转换为泥沙浓度的现场标定方法。结果表明，采用特征时刻标定所得数据与实际值相比离散性较小，统计误差约为２０％。该方法比同步采水标定更为简便实用。
The key issue of using acoustic equipment to detect suspended sediment concentrations and their changes in water is to calibrate the observed data. By analyzing the acoustic backscattering intensity data and the sediment measurements of the water samples collected from the site of the Changjiang River estuary, three on-site calibration methods were proposed to convert acoustic observations into sediment concentrations. The results show that the discrepancies of the data obtained by calibration with characteristic moments are smaller than the actual values, and the statistical error is about 20%. The method is more convenient and practical than the synchronous water calibration.