雷州半岛近海水质环境关键因子时空变化与评价

Assessment and Variation of Temporal and Spatial of Key Factors of Water Quality in Coastal Area of the Leizhou Peninsula

利用2008-2011 年共6 个航次调查数据,对雷州半岛近岸海域关键水质环境因子进行时空分析,并采用富营养指数法对该海域水质环境进行了评价,结果表明：该海域近几年COD、PO4-P、NO2-N、NO3-N、NH4-N、石油类、叶绿素浓度等关键水质因子的均值变化范围分别为0.61 - 1.71 mg/L、0.01 - 0.04 mg/L、0.004 - 0.05 mg/L、0.05 - 0.21 mg/L、0.02 - 0.20 mg/L、0.01 - 0.60 mg/L、1.16 - 3.17 μg/L.该海域COD、石油类污染程度较低,而PO4-P、无机氮污染程度高、污染风险大.半岛东部海域污染程度高于西部海域,尤其是湛江港、雷州湾及半岛东北海域呈高富营养化水平.

A total data of six cruises from 2008 to 2011 is used to study critical water quality factors andthe eutrophic index algorithms were used to evaluate the water-environment about the coast of theLeizhou Peninsula. The average concentration range of the critical water quality factors, whichcontained COD, PO4-P, NO2-N, NO3-N, NH4-N, petroleum, chlorophyll, was 0.61 – 1.71 mg/L, 0.01 –0.04 mg/L, 0.004 – 0.05 mg/L, 0.05 – 0.21 mg/L, 0.02 – 0.20 mg/L, 0.01 – 0.60 mg/L, 1.16 – 3.17 μg/L,respectively. The pollutions caused by COD and petroleum were lower; while pollutions caused byPO4-P, inorganic nitrogen were inverse indicating its pollution risks. The eastern coast of the peninsulawas more polluted than the western especially in Zhanjiang harbor, Leizhou bay and northeastern of thePeninsula showed high eutrophic lever.