基于muddy-LOICZ模型的小清河河口及下游河段营养盐通量估算

发布时间：2018-06-16 03:46

  本文选题：LOICZ模型 + 小清河口　； 参考：《海洋科学》2017年05期

【摘要】：基于2013年7月、9月小清河口及9月小清河下游河道分段营养盐数据,采用LOICZ及改进的muddy LOICZ生物地球化学收支模型,分析了小清河口及下游河道分区域的水体存留时间和营养盐收支。结果表明,小清河口夏、秋季水体存留时间分别为0.67 d和3.09 d,夏、秋季DIP平均收支分别为 2.96×103、 1.72×103 mol/d,夏、秋季DIN平均收支分别为 1.55×106、 0.77×106 mol/d。进一步分析表明,河口生产力旺盛,存在净生产过程,成为氮磷的汇,且磷汇通量要远远小于氮汇,存在强烈的反硝化反应的脱氮过程,说明该河口的低氧问题需得到进一步重视。不同的河道区域其生产力水平、呼吸作用、光合作用和硝化作用等强度等均有所不同,且在羊口镇附近有大量支流和生活排污进入,小清河下游流域的综合治理不能单一全篇而论,而应该针对不同的河道区域特点进行分别治理。需要注意的是,LOICZ模型为箱式模型,忽略物理过程的作用以及更详细的生物地球化学过程。
[Abstract]:Based on the sectional nutrient data of Xiaoqing River Estuary and Lower Xiaoqing River in July, September, 2013, and using Loix and improved muddy Loix biogeochemical budget model, The retention time and nutrient budget of the Xiaoqing River Estuary and its lower reaches were analyzed. The results show that the retention time of Xiaoqing River estuary in summer and autumn is 0.67 days and 3.09 days respectively. The average budget of dip in summer and autumn is 2.96 脳 10 ~ 3 and 1.72 脳 10 ~ 3 mol / d, respectively. The average budget of din in summer and autumn is 1.55 脳 10 ~ 6 and 0.77 脳 10 ~ 6 mol / d, respectively. Further analysis shows that the estuarine is productive and has a net production process, which becomes a sink of nitrogen and phosphorus, and the amount of phosphorus exchange is much smaller than that of a nitrogen sink, and there is a strong denitrification process. It shows that the hypoxia problem of the estuary needs to be paid more attention to. The intensity of productivity, respiration, photosynthesis and nitrification are different in different river areas, and there are a large number of tributaries and domestic sewage in the vicinity of Yangkou Town. The comprehensive management of the lower reaches of Xiaoqing River can not be discussed in a single way, but should be treated separately according to the characteristics of different river courses. It is important to note that the Loicz model is a box-type model, ignoring the effects of physical processes and more detailed biogeochemical processes.
【作者单位】： 中国科学院烟台海岸带研究所海岸带环境过程与生态修复重点实验室;
【基金】：国家自然科学基金项目(No.41406029) 中国科学院重点部署项目(KZZD-EW-14) NSFC-山东省联合基金项目(No.U1406403)~~
【分类号】：X52;X55
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本文编号：2025150