| 浏阳河长沙段CODMn、NH3-N和TP综合降解系数研究 |
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| 引用本文： | 盛丰,冯天国,王福科,文鼎,胡国华.浏阳河长沙段CODMn、NH3-N和TP综合降解系数研究[J].中国环境科学,2021,41(2):669-676. |
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| 作者姓名： | 盛丰 冯天国 王福科 文鼎 胡国华 |
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| 作者单位： | 1. 长沙理工大学水利工程学院, 湖南 长沙 410114;2. 水沙科学与水灾害防治湖南省重点实验室, 湖南 长沙 410114;3. 洞庭湖水环境治理与生态修复湖南省重点实验室, 湖南 长沙 410114 |
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| 基金项目： | 国家自然科学基金资助项目（51579020）；湖南省教育厅科学研究项目重点项目（17A009）；湖南省水利科技项目（湘水科计[2016]194-41） |
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| 摘 要： | 采用现场水团追踪法，研究了浏阳河长沙段CODMn、NH3-N和TP的综合降解系数与河段水流流速之间的相关关系，并通过河段历史水文和水质监测数据对所建立的相关方程进行了验证.结果表明，浏阳河长沙段CODMn、NH3-N和TP的综合降解系数与流速之间呈明显的线性相关关系，相关方程形式分别为K（CODMn）=0.037+0.635v、K（NH3-N）=0.059+0.315v和K（TP）=0.004+0.140v.所建立的线性相关方程对研究河段CODMn、NH3-N和TP浓度预测结果的决定系数均大于0.90、相对均方根误差均小于0.10.受风浪作用、紊动水流和弯道环流的影响，当流速小于0.35m/s时，顺直河段的污染物综合降解系数均大于弯曲河段的污染物综合降解系数；当流速大于0.46m/s时，弯曲河段污染物综合降解系数均大于顺直河段的污染物综合降解系数.研究成果对浏阳河长沙段水质管理与水环境保护具有重要的参考价值.
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| 关 键 词： | 水团追踪法 水污染物 综合降解系数 顺直河段 弯曲河段 |
| 收稿时间： | 2020-07-15 |
Comprehensive degradation coefficients of CODMn, NH3-N and TP of Changsha section of Liuyang River |
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| SHENG Feng,FENG Tian-guo,WANG Fu-ke,WEN Ding,HU Guo-hua.Comprehensive degradation coefficients of CODMn, NH3-N and TP of Changsha section of Liuyang River[J].China Environmental Science,2021,41(2):669-676. |
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| Authors: | SHENG Feng FENG Tian-guo WANG Fu-ke WEN Ding HU Guo-hua |
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| Institution: | 1. School of Hydraulic Engineering, Changsha University of Science & Technology, Changsha 410114, China;2. Key Laboratory of Water-Sediment Sciences and Water Disaster Prevention of Hunan Province, Changsha 410114, China;3. Key Laboratory of Dongting Lake Aquatic Eco-Environmental Control and Restoration of Hunan Province, Changsha 410114, China |
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| Abstract: | Water mass tracking technique was applied to study the relationship between comprehensive degradation coefficients of CODMn, NH3-N and TP and river velocity of Changsha Section of Liuyang River. Established correlation equations were verified using the measured hydrology and water quality data. The results demonstrated that, comprehensive degradation coefficients of CODMn, NH3-N and TP presented obvious linear correlation with river velocity for Changsha Section of Liuyang River, with the correlation formation as K(CODMn)=0.037+0.635v, K(NH3-N)=0.059+0.315v and K(TP)=0.004+0.140v, respectively. The established linear correlation equations between comprehensive degradation coefficients and river velocity generated accurate predictions of CODMn, NH3-N and TP concentrations with all the determination coefficients greater than 0.90, and with all the relative root mean square errors less than 0.10. Because of the impacts of wind wave, and turbulent and circulating currents, the comprehensive degradation coefficients of CODMn, NH3-N and TP for straight river section were greater than those for bending river section, correspondingly, when river velocity was less than 0.35m/s; while the comprehensive degradation coefficients of CODMn, NH3-N and TP for bending river section were greater than those for straight river section, correspondingly, when river velocity was greater than 0.46m/s. This research is of importance for water quality management and environment protection for Changsha Section of Liuyang River. |
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| Keywords: | water mass tracking technique water pollutants comprehensive degradation coefficient straight river section bending river section |
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