摘要
2012年2月至2014年3月在黄河下游采集水样,分析黄河下游营养盐浓度与通量的月际、季节性以及在调水调沙期和暴雨期的变化情况,并估算了调水调沙期和洪水期输水量和营养盐入海通量对黄河年入海通量的贡献。结果表明NO-3是TDN的主要存在形式,各形态氮营养盐枯水期高于丰水期;DIP是TDP的主要存在形式,PIP是TPP的主要存在形态,颗粒态磷和DSi丰水期高于枯水期。黄河水体中具有高DIN/DIP和DSi/DIP,低DSi/DIN,严重偏离Redfield比值。营养盐输送通量具有很强的月际变化,在径流量及输沙量最大月份也存在营养盐入海通量峰值。2002-2012年10年间调水调沙和暴雨在营养盐输送通量上占黄河下游营养盐输送通量的23%~68%和5%~59%,对营养盐年入海通量的平均贡献分别为38%和24%,二者均在短期内导致水、沙和营养盐的大量输送,将对黄河口及其邻近海域的生态环境产生重要的影响。
Observations were carried out to analyse nutrient dynamics in the lower reaches of Huanghe River from February 2012 to March 2014, including monthly and seasonal variations of nutrient and the effects of water-sediment regulation and rainstorm events freshwater discharge and on nutrient transports. NO3-, DIP and PIP were the major species of TDN, TDP and TPP, respectively. The different forms of N were lower in flood season than in dry season but the DSi and particulate phosphate concentrations were the opposite. The Huanghe River is characterized by high DIN/DIP and DSi/DIP but low DSi/DIN ratios, far from the Redfield ratio. Nutrient transport fluxes show seasonal variations with high values during high freshwater discharge and sediment load season fluxes. From 2002 to 2012, nutrient fluxes during water-sediment regulation and rainstorm periods accounted for 23%—68% and 5%—59% of annual nutrient fluxes, respectively, 38% and 24% of annual nutrient fluxes averages, respectively. Both water-sediment regulation and rainstorm events would result in more water, sediment and nutrients discharged to the coastal water and affect Huanghe River estuary and Bohai Sea ecosystem.
作者
吴念
刘素美
张桂玲
Wu Nian Liu Sumei Zhang Guiling(Key Laboratory of Marine Chemistry Theory and Technology , Ministry of Education, Ocean University of China, Qingdao 266100, China Laboratory for Marine Ecology and Environmental Science, Qingdao National Laboratory for Marine Science and Technology , Qingdao 266100, China)
出处
《海洋学报》
CAS
CSCD
北大核心
2017年第6期114-128,共15页
基金
国家重点研发计划项目(2016YFA0600902)
山东省"泰山学者"工程专项经费
青岛海洋科学与技术国家实验室"鳌山人才"计划项目(2015ASTP-OS08)
关键词
营养盐
颗粒态磷
调水调沙
暴雨
通量
黄河
渤海
nutients
particulate phosphorus
water-sediment regulation
rainstorm
flux
Huanghe River
Bohai Sea
