摘要
铁山港湾是广西沿海受径流影响较小的海湾，也是“南珠”养殖的重要基地之一。本文通过 1983—1984 年和 1996—1997 年丰、枯水期对该湾的调查研究资料，在对该湾主要环境参数进行分析、讨论的基础上，运用营养状态指数法和水质指数法对该湾 15 a 间的水质状况进行评价。结果表明：该湾 15 a 间盐度呈相对稳定状态，pH、DO 和 COD 变化不大，营养盐中 N 呈上升趋势，P 则相反，Si 随枯、丰水期变化而呈升、降趋势；但营养盐结构变化较大，显著 N 限制状况已转变为接近适宜，而 P 和 Si 则从供给充足向相对不足方向演化；水域营养状况属贫营养型，水质状况正在向良好状态发展。
：The Tieshangang Bay is less affected by the runoff among the bays of the coastal zone of Guangxi. It is also one of the important base of pearl breeding in Nanzhu. The investigations on the water quality of this bay in the higher and lower discharge periods were carried out from 1983 to 1984 and 1996 to 1997. Based on the analysis and discussion on the major environmental parameters, the condition of water quality in fifteen years is evaluated with the index method of nutrient condition and the index method of water quality. The results show that the salinity has been relatively steady in the past fifteen years. And pH, DO and COD have changed slightly. Among the three types of nutrient salt, N has increased in the past fifteen years while P has decreased. And Si has increased in the higher discharge periods and decreased in the lower discharge period. The nutrient structure has changed more greatly, which has transformed from the significant N-limitation to the usual level, and from fully supply of P and Si to relative inadequacy. The nutrient condition of this waters is a oligotrophic type. The condition of the water quality is turning for the better.
出处
《海洋通报》
CAS
CSCD
北大核心
2002年第5期69-74,共6页
Marine Science Bulletin
