黄河下游调水调沙与暴雨事件对营养盐输出通量的影响

发布时间：2018-03-24 08:00

  本文选题：营养盐　切入点：颗粒态磷　出处：《海洋学报》2017年06期

【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。
[Abstract]:From February 2012 to March 2014, water samples were collected from the lower reaches of the Yellow River to analyze the intermonthly, seasonal and seasonal changes of nutrient concentrations and fluxes in the lower reaches of the Yellow River, as well as the changes in the periods of water and sediment transfer and heavy rain. The contribution of water transport and nutrient flux to the annual flux of the Yellow River during the period of water and sediment transfer and flood was estimated. The results show that NO-3 is the main form of TDN. The main form of TDP in dry season is higher than that in high water season, and the main form of TPP is TPP. High DIN/DIP and DSI / DIPs and low DSI / DINs were found in the Yellow River water, which deviated seriously from the Redfield ratio. The nutrient transport flux had a strong intermonthly variation. In the maximum month of runoff and sediment transport, there is also a peak value of nutrient salt flux into the sea. During the 10 years from 2002 to 2012, water and sediment transfer and heavy rain accounted for 23% and 55,959% of the nutrient transport flux in the lower Yellow River. The average contribution was 38% and 24%, respectively, both leading to water in the short term. The mass transport of sand and nutrients will have an important impact on the ecological environment of the Yellow River Estuary and its adjacent sea areas.
【作者单位】： 中国海洋大学海洋化学理论与工程技术教育部重点实验室;青岛海洋科学与技术国家实验室海洋生态与环境科学功能实验室;
【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)
【分类号】：P734;X55
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本文编号：1657395