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2011年1月对湛江电厂温水排放口附近水域的生态环境进行了采样调查,分析了温排水对受纳水体的水温、溶解氧、营养盐、叶绿素a以及浮游植物的细胞密度、群落组成多样性和均匀度的影响。结果表明:电厂温排水主要影响表层水且范围较小;溶解氧虽随水温的变化稍有变化,但含量均在5.00 mg/L以上,符合渔业水域水质标准;温排水促进了受纳水体的富营养化,自然水温处至排水口中心,营养盐(无机氮、活性磷酸盐)、叶绿素a和浮游植物的细胞密度、种类数呈递增趋势;从浮游植物群落的多样性指数和均匀度分析,温排水提高了群落的多样性和抗干扰能力;在对浮游植物与主要环境因子间的偏相关性分析发现,浮游植物细胞密度和水温呈极显著正相关,相关系数为0.941 8(p<0.01),与活性硅酸盐呈显著负相关,相关系数为-0.892 4(p<0.05),与其他因子相关性不明显。
In January 2011, the ecological environment in the waters near the warm water discharge of Zhanjiang Power Plant was investigated. The effects of warm water on the water temperature, dissolved oxygen, nutrients, chlorophyll a and phytoplankton cell density, community composition diversity And the effect of uniformity. The results show that the thermal discharge of power plants mainly affects the surface water and has a small range. Dissolved oxygen slightly changes with the change of water temperature, but the content is above 5.00 mg / L, which is in line with the fishery water quality standards. Eutrophication, natural water temperature to the drainage center, nutrient salts (inorganic nitrogen, active phosphate), chlorophyll a and phytoplankton cell density, the number of species showed an increasing trend; from the phytoplankton community diversity index and evenness analysis , And warm drainage improved community diversity and anti-interference ability. Partial correlation analysis between phytoplankton and major environmental factors showed that there was a significant positive correlation between phytoplankton cell density and water temperature, with a correlation coefficient of 0.941 8 (p < 0.01), but negatively correlated with active silicate. The correlation coefficient was -0.892 4 (p <0.05), with no significant correlation with other factors.