长岛连岛坝两侧海域海水水质比较研究

长期以来,连接南北长山岛的大坝一直被视为导致其西侧庙岛塘海域水质恶化的重要原因,但这种推断并没有得到证实。通过分析2007年9月和11月2次海水水质调查数据,比较了连岛坝两侧海域的水质环境。对比分析结果表明,连岛坝西侧半封闭海域海水质量较东侧开放海域略差,但不同类的水质因子表现完全不同。研究认为,拆除南北长山岛间的连岛坝,促进连岛坝两侧海水交换,可降低西侧海域的部分海水水质因子的浓度,从而对改善其水质环境起到一定的作用。但单纯从水质的角度看,这种作用是有限的。

Comparison Between Seawater Qualities Respectively East and West of Changdao Tombolo

As it is holden in a long time,the tembolo dyke connecting the norther Changdao with the southern Changdao might be a determinative cause for the water quality deterioration in the Miaodaotang sea area,which is located to the west of the tembolo.However it needs proving.Based on the analyses of the water quality data from the surveys respectively carried out in September and in November 2007,the marine environmental conditions respectively in the both sides of the tembolo are compared with each other.As it is shown in the results from the comparison,the water quality is slightly worse in the semiclosed sea to the west of the tembolo than in the sea to its east,but these evidential data depend upon the observed water quality elements.It is believed in this study that the tembolo dyke removal and the full water exchange between the both sides of the dyke is more or less helpful to decrease the concentrations of some pollutants so that the sea water quality can be improved in some degrea.However the effects of the dyke removal on the water quality are much limited.