唐山市近海养殖区2019年水环境调查及分析

Investigation and analysis of water quality of coastal aquaculture area in Tangshan City in 2019

为了解唐山近海养殖区水域状况,于2019年5月、8月和11月对其水质和浮游植物进行调查监测。运用营养指数(E)法、营养状态质量指数(NQI)、有机污染评价指数(A)法及生物多样性指数(H)法来评价和分析该养殖区水域状况。结果表明,该养殖区营养指数(E)5月时空变化范围为0.01~0.97;8月时空变化范围为0.14~0.59;11月时空变化范围为0.25~0.63,有机污染指数(A)5月为0.39~1.33;8月为0.73~1.16;11月时空变化范围为0.87~1.19,浮游植物多样性指数(H)5月为0.84~2.11;8月为1.07~1.21;11月为1.92~2.86。本研究表明该养殖区营养水平总体上很低,处于贫营养状态,浮游植物多样性8月优于5月和11月,水域有机污染程度低,水质较好。

In order to understand the water quality of Tangshan offshore aquaculture area,we investigated and monitored the water quality and phytoplankton in spring,summer and winter of 2019.Nutrition index(E),nutrient quality index(NQI),organic pollution assessment index(A)and biodiversity index(H)were used to evaluate and analyze the water.The results showed that the spatial and temporal variation range of nutrient index E was between 0.01~0.97in spring,0.14~0.59in summer and 0.25~0.63in winter;organic pollution index A was between 0.39~1.33in spring,0.73~1.16in summer,and 0.87~1.19in winter;phytoplankton diversity index H was between 0.84~2.11in spring,1.07~1.21in summer and 1.92~2.86in winter.The results showed that the nutrient level of the culture area was generally low,and it was in poor nutrition state.The phytoplankton diversity in summer was better than that in spring and winter.The organic pollution degree of the water area was low,and the water quality was good.