摘要
根据对环钦州湾区域的入海河流、直排海污染源及养殖废水无机氮入海通量的估算,2011年钦州湾无机氮入海通量约为7 655 t,其中入海河流无机氮入海通量占总量的96.4%,直排海污染源次之。入海无机氮占钦州湾无机氮总量的比重为36.7%,说明钦州湾已属中等强度人为影响海域。根据对钦州湾富营养化症状——叶绿素a含量的分析,钦州湾富营养化症状不明显,钦州湾整体的富营养化程度较低。因而仅以营养盐含量评价目标海域的富营养化程度,易失之偏颇,宜结合富营养化症状来判断目标海域的富营养化程度。
The flux of inorganic nitrogen flowing into Qinzhou Bay was estimated based on the flux of inorganic nitrogen from river into sea,land-based pollution sources directly discharged into sea and aquaculture wastewater. Result showed that the flux of inorganic nitrogen flowing into the Bay was about 7 655 t in 2011, among which the flux of inorganic nitrogen from river accounted for 96.4% of the total flux, and followed by the flux of inorganic nitrogen from land-based pollution sources directly discharged into sea. Inorganic nitrogen from land source accounted for 36.7% share of inorganic nitrogen in the Bay, indicating the anthropogenic impact in the Bay was moderate. Analysis of chlorophyll a indicated that the eutrophic symptoms in the Bay were not obvious, and the eutrophication degree was low. There was some mistake to evaluate eutrophication depending on nutrients only, and it should be combined with eutrophication symptoms to evaluate eutrophication in the offshore.
出处
《环境科学与技术》
CAS
CSCD
北大核心
2014年第1期174-178,共5页
Environmental Science & Technology
基金
国家自然科学基金项目(51168001)
