龙口附近海域海水现状分析及变化趋势研究

Evaluation and Changing Trend Analysis on Coastal Seawater Quality Status of Longkou

依据2010年11月秋季在龙口附近海域进行的海洋环境综合调查结果,应用水质标准指数法、富营养化指数法和有机污染综合指数法对该海域的海水水质现状进行了分析和评价,结合历史资料探讨了主要污染因子在近25年间的累年变化趋势。结果显示:该海域2010年11月表层海水中各评价要素基本符合海水水质二类标准,最主要的污染物为石油类;近25年间主要污染因子的变化趋势总体是增加的,但相对幅度不大;该海域整体的富营养化水平处于临界状态,正处于开始受到有机污染的阶段。

Based on the data obtained in the coastal waters of the Longkou coastal area in November 2010, studied the distribution characteristic of temperature, salinity, pH, dissolved oxygen, COD, DIN, PO43--P and petroleum hydrocarbons, and evaluated the nutrient level and organic pollution situation by using methods such as water quality standards index, eutrophication index and water organic pollution evaluation index. Combined with historical data and discussed the trend of major pollution elements in this area. It is shown in the results that the evaluation elements in sea water of Longkou coastal area are in accord with the second class of the sea water quality standard of National Standards, and the main pollution is petroleum hydrocarbons. The content of main pollution is increasing during the past 25 year; however, the rate of increase is not obvious.At present, the whole sea area of Longkou is in a critical state eutrophication level, and the organic pollution degree remained at the second level in autumn 2010, which indicated that the water area has begun polluted by organic materials.