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| 基于LOADEST模型和M-K检验的淮河入洪泽湖氮磷污染通量分析 |
| Analysis of Nitrogen and Phosphorus Pollution Flux from Huai River into Hongze Lake Based on LOADEST Model and M-K Test |
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| DOI： |
| 中文关键词: 总氮 总磷 输移通量 LOADEST模型 M-K检验 淮河 洪泽湖 |
| 英文关键词: TN TP Transport flux LOADEST model M-K test Huai Rive Hongze Lake |
| 基金项目:国家重点研发计划“基于全耦合模型的城市生态环境多尺度监测技术研究”基金资助项目（2019YFB2102003）；2021年江苏省研究生科研与实践创新计划基金资助项目（SJCX21_0211） |
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| 中文摘要: |
| 基于2015—2020年淮河入洪泽湖断面的水文水质数据，利用LOADEST模型建立污染物通量与河流流量之间的统计回归模型，并估算淮河入洪泽湖总氮（TN）、总磷（TP）污染物通量。结果表明，2005—2020年间淮河TN、TP年平均输移通量分别为（4 730.14±1 893.32）t、（257.56.±108.53）t；受流量变幅影响，TN、TP输移通量与河流流量均呈极显著性相关关系（p＜0.01）。采用M-K检验分析发现，研究期间淮河TN和TP的输移通量总体上呈下降趋势，2018年12月后受入湖水量与氮磷浓度双重影响氮磷输移通量下降趋势更为明显。 |
| 英文摘要: |
| A statistical regression model between pollutant flux and river discharge was established by using LOADEST model based on the hydrologic and water quality data at the section of Huai River into Hongze Lake from 2015 to 2020, and the pollutant flux of total nitrogen(TN) and total phosphorus(TP) from Huai River into Hongze Lake was estimated. The results showed that the average annual transport flux of TN and TP from 2005 to 2020 were(4 730.14±1 893.32) t and(257.56±108.53) t, respectively. Affected by river discharge, the transport fluxes of TN and TP were significantly correlated with river discharge(p＜0.01). M-K test analysis showed that the transport fluxes of TN and TP in Huai River had a decreasing trend in general during the study period, and the decreasing trend was more obvious after December 2018 due to the dual effects of lake water volume and the concentration of nitrogen and phosphorus. |
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