摘要
陆源污染物排海数量不断增多是造成胶州水质恶化的主要原因之一,准确核算陆源污染物入海通量是进行胶州湾陆源污染物总量控制的前提和基础。该研究应用2012-2013年在胶州湾陆源源区和海域进行的春、夏、秋、冬四季陆海同步调查资料,分析了胶州湾源区不同季节溶解无机氮(DIN)、溶解无机磷(DIP)的入海通量分担率与胶州湾海水水质间的时空对应关系,并基于胶州湾源区DIN和DIP的分配容量计算结果,评价了胶州湾源区污染物的超载状况。结果表明,2012-2013年入胶州湾源区DIN、DIP的通量分别为7 400和280 t/a,且呈现丰水期高、平水期和枯水期低的季节变化特征;其中位于胶州湾北部和东北部的大沽河源区、墨水河源区、李村河源区和楼山河源区超载率较高,DIN和DIP平均超载率分别达到349%和318%;DIN、DIP入湾通量超载率最高的源区都为墨水河源区,超载率分别为610%和555%,这是导致胶州湾东北部海域污染严重的直接原因。要实现胶州湾海水水质达标,需要根据入胶州湾各个源区的水质分配容量,科学制定胶州湾陆源氮磷污染物入海通量时空差别化减排方案。
The continuously increased land-based discharges of pollutants into the adjacent see water has been regarded as the main cause of water quality degradation of the Jiaozhou Bay(JZB). How to accurately calculate the flux of land-based pollutant load is the premise and foundation for the total pollutant load control management in the JZB. Based on the data of land and sea areas surveys simultaneously conducted in spring, summer, autumn and winter of the years from 2012 to 2013,the temporal and spatial relationship between the flux sharing rate of dissolved inorganic nitrogen(DIN) and dissolved inorganic phosphorus(DIP), and the sea water quality in the JZB in different seasons were analyzed, the distribution capacity of DIN and DIP in the land-based area was calculated, besides the pollutants-overloaded situation in the land-based area was evaluated. As a consequence, it was showed that the fluxes of DIN and DIP into the source area of the JZB were equal to 7 400 and 280 t/a, respectively, with the seasonal variation characteristics, i.e. the fluxes higher in wet season, lower in normal and dry seasons. Within the Bay area, the sources of the rivers of Dagu, Moshui, Licun and Loushan flowing into the sea in north and northeast JZB were characterized by higher overload rates, with the average overloading rates of DIN and DIP reaching 349% and 318%, respectively. Of the source areas the highest overloading rates of DIN and DIP fluxes into the sea of the Bay were the source of the Moshui River, with overloading rates of 610% and 555% respectively, which was directly causing serious pollution in northeastern Bay area. In order to be compliant with the national standard of seawater quality in the JZB, it is necessary to formulate a scientific spatial-temporal differential emission reduction scheme according to the distributed capacity which was determined based on the quality of the water of each source area.
作者
李姗姗
于晓霞
张鹏
崔文连
杨南南
李爱华
梁生康
LI Shanshan;YU Xiaoxia;ZHANG Peng;CUI Wenlian;YANG Nannan;LI Aihua;LIANG Shengkang(Key Laboratory of Marine Chemistry Theory and Technology,Ministry of Education,Qingdao 266100,China;College of Chemistry and Chemical Engineering,Ocean University of China,Qingdao 266100,China;Shandong Academy for Environmental Planning,Jinan 250101,China;College of Chemistry and Environment,Guangdong Ocean University,Zhanjiang 524088,China;Qingdao Ecological Environment Monitoring Center,Qingdao 266003,China)
出处
《环境科学与技术》
CAS
CSCD
北大核心
2021年第10期11-18,共8页
Environmental Science & Technology
基金
国家重点研发计划项目(2018YFC1407602)
国家海洋局海洋公益性科研专项(201205018)。
关键词
水质
氮磷污染物
入海通量
污染物总量控制
胶州湾
seawater quality
nitrogen and phosphorus pollutants
flux input to sea
total pollutant load control
Jiaozhou Bay
