Long-term measurement and research on the flow rate in Zhoushan, China

Abstract

In order to understand the flow rate of the new copper cage to be put into the Zhoushan sea area, this study used a point Doppler flowmeter to measure the flow velocity of the deep-water cage culture in Zhujiajian, Zhoushan, Zhejiang Province for a long time, and measured the sea area as a regular half-day tide, and finally measured the results show that the flow rate shows a significant periodic change. Maximum flow rate is within 3-4 hours before and after the climax, generally between 1.2 m/s and 1.6 m/s, and then the flow rate is rapidly reduced to about 0.2 m/s. At the arrival of the low tide, the flow rate will have a small increase which reached about 0.5 m / s, after the low tide, slightly decreased, until the new climax came. The maximum flow rate during the measurement occurred at the moment when the tide occurred in the month, which was 1.983 m/s (average flow rate of 30 s).