太湖西岸出入湖河口氮磷消减特征

发布时间：2018-12-06 10:58

【摘要】：河流水体污染物消减作用是降低其入湖通量的重要方式,为探明太湖河流氮磷污染物消减速率时空变化特征,研究采用自主研发的原位培养装置,开展了太湖西岸出入湖河口总氮绝对消减速率(TNR_绝)、总氮相对消减速率(TNR_相)、总磷绝对消减速率(TPR_绝)、总磷相对消减速率(TPR_相)的变化特征研究。结果表明:西北部和西部河流夏、秋季TNR_绝和TPR_绝高于春、冬季,南部河流则为秋、冬季高于春、夏季。夏季西部和西北部河流TNR_绝和TPR_绝高于南部,冬季则相反,春、秋两季空间差异不明显。颗粒态总氮(PTN)浓度及水温是TNR_绝时空差异性的主要影响因素。TP浓度是TPR_绝的季节差异性的主要原因,不同季节TPR_绝空间差异的主要影响因素不同,春、夏、秋、冬四季主要影响因素分别为p H等水体物理性质、TP浓度和SS浓度、SS浓度、TP浓度。TNR_绝和TPR绝及其初始浓度是TNR_相和TPR_相时空差异的主要原因。
[Abstract]:Pollutant abatement is an important way to reduce the flux into the lake. In order to find out the temporal and spatial variation of nitrogen and phosphorus pollutant reduction rate in Taihu Lake, a self-developed in situ culture device was used. The variation characteristics of absolute rate of total nitrogen reduction (TNR_ absolute), relative rate of total nitrogen reduction (TNR_ phase), absolute rate of total phosphorus subtractive rate (TPR_ absolute) and total phosphorus relative subtractive rate (TPR_ phase) in the estuary of Taihu Lake were studied. The results show that the TNR_ and TPR_ in autumn are higher than that in spring, while in winter, the southern rivers are autumn, winter is higher than spring and summer. The TNR_ and TPR_ of the western and northwestern rivers in summer are higher than those in the south, but in winter there is no significant difference between spring and autumn. (PTN) concentration of granular nitrogen and water temperature are the main influencing factors of the spatial and temporal difference of TNR_, TP concentration is the main reason of seasonal difference of TPR_ absolute, and the main influencing factors of TPR_ absolute spatial difference in different seasons are different, spring, summer, autumn, and so on. The main influencing factors were pH, TP, SS, TP, TNR_ absolute and TPR absolute and their initial concentration, which were the main reasons for the difference between TNR_ phase and TPR_ phase.
【作者单位】：南京农业大学资源与环境科学学院;中国科学院南京地理与湖泊研究所湖泊与环境国家重点实验室;
【基金】：水体污染控制与治理科技重大专项(2014ZX07101-011) 国家自然科学基金(41271213) 中国科学院重点部署项目(KZZDEW-10)~~
【分类号】：X522

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