每年4月中下旬和5月上旬,是长江口,杭州湾东部海域赤潮灾害频发阶段,浙江沿海地区、特别是海岛地区深受其害。最近发生的一次较大规模的赤潮是在刚刚过去的5月上旬,波及舟山附近约2000平方公里的海域,被海洋监测部门认定为特大赤潮灾害,这也是今年我国进入赤潮高发期以来的最大一起赤潮灾害事件。 In late April and early May of each year, it is the frequent stage of red tide disaster in the estuary of the Changjiang Estuary and the east of Hangzhou Bay. The coastal areas in Zhejiang, especially the island area, have suffered greatly. Recently, a relatively large-scale red tide occurred recently in early May and affected about 2,000 square kilometers of sea area near Zhoushan. It was identified by the marine monitoring department as a major red tide disaster, which is also the largest since the high-incidence period of red tide in our country this year Red tide disaster event.