应用ADP探测长江口区泥沙浓度的实验研究

The Test Using Signal Strength Data to Monitor Suspended Sediment Concentration in Changjiang Estuary

声学多普勒流速剖面仪ADP不仅可以测量流速,其记录的声强信号还包含有泥沙浓度的信息,为探讨ADP测悬沙浓度的可行性,本文根据长江口区现场六点法测得的悬沙浓度,对输出信号进行标定,反演获得悬沙浓度.结果表明在500kHz的工作频率下,计算出的悬沙浓度在中上层水体平均误差较小(25%～38%),但要用ADP测整个垂直剖面的悬沙浓度还有待做进一步试验研究.

SonTek Doppler Current Meter (ADP) has been in common use in measuring the current profile. It has been recognized that the backscattered ADP signal could be used to not only evaluate the current, but also offer the possibility of extracting information of the sediment concentration. In order to examine the potential of ADP for suspended sediment measurements in the south passage of Changjiang Estuary, the signal strength data obtained from SonTeck Doppler Current Meter has been calibrated against in-situ bottle samples of the suspended material.