福建近海若干个拟投放深水网箱海湾理化环境调查与评估

Investigation and valuation on physical and chemical environments of sea areas in Fujian for setting-resistant cage in deep sea

根据2000和2001年福建主要港湾调查所获得的海洋水文和海洋化学环境资料,对拟投放深水抗风浪网箱海域的海水理化因子作了较详细的分析研究,以评估该海域是否适合于投放深水网箱。结果表明,三都澳、官井洋、东吾洋、罗源湾、福清湾、兴化湾,湄州湾和东山湾水深在25m以上,湾外有岛屿屏障,环境隐蔽、水流稳定,水温、盐度和透明度有显著的季节变化,pH和DO符合国家渔业水质标准,COD一般符合一类海水水质标准,局部海域达到二类海水水质标准,IN、PO4-P一般符合二类海水水质标准,在秋季有些港湾达到三类海水水质标准。从理化环境的角度分析,上述海湾可作为投放深水网箱之场所。

Based on the data of investigation on marine hydrological and marine chemical environments of main bays in Fujian, detail analysis and research were carried out on marine physics and chemistry factors of sea area where will be set wave-resistant cage in deep sea to assess whether these sea areas would fit for wave-resistant cage in deep sea. The conclusion shows that in Sansha Bay, Luoyuan Bay, Fuqing Bay, Xinghua Bay, Meizhou Bay and Dongshan Bay, the depths of water is more than 25m. The temperature, salinity and transparency in the bays vary obviously as season change. The fishery resource has been rich with little drainage of wasted water. Islands out of the bays are natural defences and water flow is calm. pH and DO are up to the government standards of fisheries water quality. COD generally accords with the standard of the first water quality, in parts of sea area it reaches the second water quality. IN and PO4-P generally accord with the standard of the second water quality, in some bays they reach the third water quality in autumn. So these bays are suitable areas to set wave-resistant cage in deep sea.