發(fā)布時(shí)間：2018-06-16 03:46

  本文選題：LOICZ模型 + 小清河口　； 參考：《海洋科學(xué)》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營(yíng)養(yǎng)鹽數(shù)據(jù),采用LOICZ及改進(jìn)的muddy LOICZ生物地球化學(xué)收支模型,分析了小清河口及下游河道分區(qū)域的水體存留時(shí)間和營(yíng)養(yǎng)鹽收支。結(jié)果表明,小清河口夏、秋季水體存留時(shí)間分別為0.67 d和3.09 d,夏、秋季DIP平均收支分別為 2.96×103、 1.72×103 mol/d,夏、秋季DIN平均收支分別為 1.55×106、 0.77×106 mol/d。進(jìn)一步分析表明,河口生產(chǎn)力旺盛,存在凈生產(chǎn)過(guò)程,成為氮磷的匯,且磷匯通量要遠(yuǎn)遠(yuǎn)小于氮匯,存在強(qiáng)烈的反硝化反應(yīng)的脫氮過(guò)程,說(shuō)明該河口的低氧問(wèn)題需得到進(jìn)一步重視。不同的河道區(qū)域其生產(chǎn)力水平、呼吸作用、光合作用和硝化作用等強(qiáng)度等均有所不同,且在羊口鎮(zhèn)附近有大量支流和生活排污進(jìn)入,小清河下游流域的綜合治理不能單一全篇而論,而應(yīng)該針對(duì)不同的河道區(qū)域特點(diǎn)進(jìn)行分別治理。需要注意的是,LOICZ模型為箱式模型,忽略物理過(guò)程的作用以及更詳細(xì)的生物地球化學(xué)過(guò)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.
【作者單位】： 中國(guó)科學(xué)院煙臺(tái)海岸帶研究所海岸帶環(huán)境過(guò)程與生態(tài)修復(fù)重點(diǎn)實(shí)驗(yàn)室;
【基金】：國(guó)家自然科學(xué)基金項(xiàng)目(No.41406029) 中國(guó)科學(xué)院重點(diǎn)部署項(xiàng)目(KZZD-EW-14) NSFC-山東省聯(lián)合基金項(xiàng)目(No.U1406403)~~
【分類號(hào)】：X52;X55
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本文編號(hào)：2025150