发展海洋牧场构建“蓝色粮仓”

为了探明人工鱼礁对局地潮汐动力等因素的影响规律和机制，根据2016年7月东山海人工鱼礁区内外2个站位的25 h连续观测流速和水位数据，结合数值模拟方法，分析了广东惠州东山海人工鱼礁区建成后对礁区及周边海域潮汐动力等造成的影响。基于数值模拟，对建礁前后模拟结果对比分析获得了潮汐潮流等因子的变化情况。结果显示，模型模拟结果与实测值吻合良好；人工鱼礁区建成后对研究区域的潮汐调和常数和潮汐特性几乎没有影响；人工鱼礁区的部分分潮潮流椭圆会改变方向和转向，礁区外则几乎没有影响；建礁后礁区内部余流方向改变不大，礁区整体余流呈减小趋势；礁区附近水平流场改变明显，但对礁区外部影响范围有限，礁区迎流面有明显上升流，大潮涨急时刻底层上升流最大可达1.2 cm·s^–1，礁区后部则出现下降流。

Monitoring of reef associated and pelagic fish communities on Australia's first purpose bulit offshore artificial reef

In order to find out the influence law and mechanism of artificial reef on local tidal dynamics and other factors, according to the 25-hour continuous observation flow velocity and water level data of two stations in Dongshanhai artificial reef in July 2016, combining with numerical simulation method, we analyzed the effects of artificial reef on tidal power in the reef area and surrounding sea areas. With the simulation results before and after the reef construction, we obtained the variation trend of factors such as tidal current. The results show that the model simulation results fit well with the measured values. The artificial reef area had barely no effect on the tide constants and tidal characteristics in the survey area after completion. Some of the tidal current ellipsed in the artificial reef area changed direction and turned, and there was barely no influence outside the reef area. After the reef was built, the direction of the residual current within the reef area changed little, and the overall residual current of the reef area showed a decreasing trend towards the south. The horizontal flow field near the reef area changed significantly, but the influence in outer area of the reef was limited. There was an obvious upwelling flow in the inflow area of the reef, and the maximum bottom upwelling flow reached 1.2 cm·s^–1 at the time of the tide surge, while the downwelling flow appeared at the back of the reef area.