余晓,李国强,诸葛亦斯,杜强,刘晓波,赵冲.潘家口水库氮与磷营养盐的时空变化及滞留效应分析[J].中国水利水电科学研究院学报,2020,18(6):469-478
潘家口水库氮与磷营养盐的时空变化及滞留效应分析
Distributions and retention of nitrogen and phosphorus in Panjiakou Reservoir
投稿时间:2019-12-17  
DOI:10.13244/j.cnki.jiwhr.20190217
中文关键词:  潘家口水库  总磷  总氮  滞留效应  内源污染
英文关键词:Panjiakou Reservoir  total phosphorus  total nitrogen  retention effect  internal pollution
基金项目:国家重点研发计划课题(2016YFC0401701)
作者单位
余晓 中国水利水电科学研究院, 北京 100038 
李国强 中国水利水电科学研究院, 北京 100038 
诸葛亦斯 中国水利水电科学研究院, 北京 100038 
杜强 中国水利水电科学研究院, 北京 100038 
刘晓波 中国水利水电科学研究院, 北京 100038 
赵冲 华东勘测设计研究院有限公司, 浙江 杭州 310014 
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中文摘要:
      潘家口水库是华北地区的重要水源,对保障区域供水安全发挥着重要作用。本文以该水库为研究对象,分析了建库以来水库氮、磷营养盐的时空变化特征、滞留效应。结果表明:建库以来水库TP浓度呈上升趋势,最高达到0.37 mg/L;库区TN、硝酸盐的浓度较高,年际变化小,近15年平均浓度分别为4.4 mg/L、3.5 mg/L,氨氮浓度基本低于0.5 mg/L。库区氮、磷以滞留为主,其浓度主要受来水影响;磷的滞留效率呈下降趋势,近5年滞留效率为-6%;氨氮滞留效率一直较高,近5年滞留效率为72%;硝酸盐滞留效率呈增加趋势,近5年滞留效率为20%,硝酸盐和磷的滞留效应呈显著的负相关关系。结合垂向水质监测的分析表明,近年来库底存在内源污染的显著释放和反硝化脱氮。潘家口水库库底沉积物污染严重,内源污染将是未来水库水质恶化的潜在风险。为了保证水库的供水水质,抑制库区内源污染的释放,建议水库尽量保持高水位运行。
英文摘要:
      Panjiakou Reservoir is an important water source in North China, which plays an important role in ensuring regional water supply security. This paper systematically analyzes spatial-temporal variation char-acteristics and retention of nitrogen and phosphorus in Panjiakou Reservoir since its construction. The re-sults show that the TP concentration of the reservoir has been on the rise since the reservoir was construct-ed, with a maximum of 0.37mg/l. The TN and nitrate concentration of the reservoir are relatively high with little interannual change. The average concentrations in the past 15 years are 4.4mg/l and 3.5mg/l respective-ly. And the ammonia nitrogen concentration is basically lower than 0.5mg/l. The nitrogen and phosphorus in the reservoir area are mainly retained, and their concentration are mainly affected by inflow concentration. The retention efficiency of phosphorus is decreasing, and the retention efficiency is -6% in the past five years. The retention efficiency of ammonia nitrogen has been higher, and the retention efficiency is 72% in the past five years. The retention efficiency of nitrate is increasing, which is 20% in recent five years, and the retention effect of nitrate and phosphorus is negatively correlated. Combined with the analysis of ver-tical water quality monitoring, it shows that there have been significant release of internal pollution and de-nitrification at the bottom of the reservoir in recent years. The sediment pollution of Panjiakou Reservoir is serious, and the internal pollution will be the potential risk of water quality deterioration in the future. In order to ensure the water quality of the reservoir and restrain the release of the internal pollution,it is sug-gested that the reservoir keep the high water level as much as possible.
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