文章摘要
刘畅,刘晓波,周怀东,李步东,王世岩,王亮.大流量调度过程对水库缺氧区抑制阈值条件研究[J].水利学报,2021,52(10):1217-1228
大流量调度过程对水库缺氧区抑制阈值条件研究
Study on the threshold condition to suppress anoxic zone by large flow operation process
投稿时间:2021-01-25  
DOI:10.13243/j.cnki.slxb.20210110
中文关键词: 热分层  缺氧区  大流量调度  阈值条件
英文关键词: thermal stratification  anoxic zone  large flow operation process  threshold condition
基金项目:国家重点研发计划项目(2016YFC0401701);国家自然科学基金项目(51679256);重大水利工程水生态安全保障及调控技术研究创新团队项目(WE0145B592017);中国水利水电科学研究院科技项目(WE0163A052018,WE0163A042018,WE0145B422019,HTWE0202A242016)
作者单位
刘畅 中国水利水电科学研究院 流域水循环模拟与调控国家重点实验室, 北京 100038 
刘晓波 中国水利水电科学研究院 流域水循环模拟与调控国家重点实验室, 北京 100038 
周怀东 中国水利水电科学研究院 流域水循环模拟与调控国家重点实验室, 北京 100038 
李步东 中国水利水电科学研究院 流域水循环模拟与调控国家重点实验室, 北京 100038 
王世岩 中国水利水电科学研究院 流域水循环模拟与调控国家重点实验室, 北京 100038 
王亮 中国水利水电科学研究院 流域水循环模拟与调控国家重点实验室, 北京 100038 
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中文摘要:
      大型水库在热分层期间出现的底部缺氧问题将严重影响湖库底层水体水质,威胁水库供水安全。水库大流量调度引起的强水动力条件可有效削弱甚至完全消除库区缺氧现象。本文以引滦入津源头工程——大黑汀水库为例,采用三维水动力-水质模型复演了水库缺氧区的演化过程,发现大黑汀全库在缺氧区稳定发展时段的8月份有2/3区域出现缺氧现象。为应对缺氧引起的供水安全风险,本文基于多情景分析方法给出了大流量调度过程抑制大黑汀水库缺氧现象的分级调度阈值条件。当大流量调度过程日均流量达到96.5 m3/s且持续时长15~30 d时,大黑汀水库约70%~90%的缺氧区可得到抑制;当流量达到115.7 m3/s且持续时长15~30 d时,90%~100%的缺氧区可得到抑制,库区缺氧现象将基本消除。
英文摘要:
      The hypoxia in large reservoirs during the thermal stratification period will seriously affect its water quality, threatening the water supply safety of the reservoir. The strong convection conditions caused by the large flow discharge process can seriously weaken or even completely eliminate the hypoxia in the reservoir. Taking Daheiting reservoir as an example, the evolution process of anoxic area in Daheiting reservoir is inversed by using a three-dimensional mathematical model. It is found that hypoxia occurs in about 2/3 area of Daheiting reservoir in August, the stable development period of the anoxic area. In order to reduce the risk of water supply safety caused by hypoxia, through the analysis of each scenario, this paper gives the hierarchical threshold conditions to suppress anoxic zone in Daheiting reservoir. The results show that when the average daily flow reaches 96.5m3/s and the total dispatching time is 15~30 days, it is a good threshold for the suppression of the anoxic zone of the Daheiting Reservoir. At this time, about 70%~90% of the anoxic zone will hopefully be suppressed. When the average daily flow rate reaches 115.7m3/s and the total scheduling time is 15~30 days, it is the perfect threshold. At this time, about 90%~100% of the anoxic zone will be suppressed, and the hypoxia phenomenon in the reservoir area will be basically eliminated.
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