声学多普勒剖面仪测沙技术在长江口江亚北槽水域的应用

Application of measuring suspended sediment concentration in Jiangya North Channel in Yangtze estuary by acoustic doppler current profile( ADCP)

针对声学多普勒剖面仪(ADCP)测沙在长江水域是否可行的问题,同时采用ADCP与传统的六点法采集水样的测沙方法,在长江口江亚北槽水域进行试验,经过大中小潮的测量,得出完整涨落潮周期里的两种测量数据。经过数据比对发现,ADCP测沙是可行的,ADCP的声强对数变化值与悬沙浓度成正相关的线性关系,并发现水下噪声和水下气泡以及水体介质的多样性是ADCP测沙数据误差的主要来源。

Aiming at the problem of whether ADCP can measure the measuring suspended sediment concentration in the Yangtze River area,this paper applies the methods of ACDP and six-points water samples collecting to test the waters in the Yangtze River estuary.Through the measurement of spring,middle and neap tide,this paper obtains the data of two measurements in the full ebb and flow cycle.The data comparison shows that it is feasible that suspended sediment concentration is measured by ADCP.There is a linear relation between the changes of logarithm of ADCP’s intensity and suspended sediment concentration.The source of the measurement error with ADCP is underwater noise,underwater bubble and variousness of water.