| 摘要: |
| 用DR300型宽幅ADCP在胶洲湾口门进行了走航式断面观测。观测期间悬沙浓度小于40 mg/L，悬沙粒度分布曲线具有双峰特征，调查船航速为2–3 m/s。用水样过滤法率定相应的ADCP声学信号，获得了计算悬沙浓度的半经验公式及悬沙浓度剖面分布数据。分析结果表明，即使在悬沙浓度较低、悬沙分选性较差、船速较高等不利于ADCP观测的现场条件下，测量误差仍与光透式浊度计的误差相当。因此，在走航状态和低悬沙浓度条件下，用宽幅ADCP测定悬沙浓度是可行的；这一方法在浅海区域的应用可以使悬沙浓度测量效率得到大幅度提高。 |
| 关键词: ADCP 悬沙浓度 回声强度 胶洲湾 |
| DOI： |
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| 基金项目:中国科学院院长基金“百人计划”海洋沉积动力学（A1097020号）和国家杰出青年科学基金（49725612号）资助 |
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| A PRELIMINARY STUDY ON SUSPENDED SEDIMENT CONCENTRATION MEASUREMENTS USING AN ADCP MOUNTED ON A MOVING VESSEL |
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WANG Ya-ping, GAo Shu, LI Kun-ye
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Institute of Ocaenology, The Chinese Academp of Scieiences, Qingdao, 266071
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| Abstract: |
| A DR300 Broad Band ADCP mounted on a moving vessel (with a speed of 2–3 m/s) was used to measure the profile of suspended sediment concentration. The measurements were undertaken at the entrance to Jiaozhou Bay, Shandong Peninsula (where the water is associated with a low suspended sediment concentration) during a spring tide. The echo intensity data produced by the ADCP have been transformed into suspended sediment concentration data on the basis of in situ calibration. The results show that the calibrated curve can be used to calculate the suspended sediment concentration, with a relative error of around 32%. Hence, it is feasible to measure the suspended sediment concentration using the ADCP mounted on a moving vessel with a relative high speed. Further, this technique can be applied to the measurement of low suspended sediment concentrations. Compared with transmmisometers and conventional acoustic backscatters, the ADCP represents a potentially powerful tool to obtain suspended sediment concentration data with a high efficiency in continental shelf waters. |
| Key words: ADCP, Suspended sediment concentration, Echo intensity, Jiaozhou Bay |
