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清华大学学报(自然科学版)  2015, Vol. 55 Issue (1): 39-45    
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水库蓄水后长江上游珍稀特有鱼类国家级自然保护区干流溶解氧时空分布
沈忱1,2,吕平毓3,王义成2,倪广恒1(),冯顺新2
2. 中国水利水电科学研究院 水电可持续发展研究中心, 北京 100038
3. 长江上游水文水资源勘测局, 重庆 400014
Spatial and temporal distribution of dissolved oxygen in the main stream of the National Nature Reserve for Rare and Endemic Fish in the Upper Reaches of the Yangtze River after reservoir impounding
Chen SHEN1,2,Pingyu LV3,Yicheng WANG2,Guangheng NI1(),Shunxin FENG2
1. State Key Laboratory of Hydroscience and Engineering, Tsinghua University, Beijing 100084, China
2. Research Center for Sustainable Hydropower Development, China Institute of Water Resources and Hydropower Research, Beijing 100038, China
3. Upper Changjiang River Bureau of Hydrological andWater Resources Survey, Chongqing 400014, China
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摘要 

水体的溶解氧(DO)是表征水体健康的重要指标之一。为研究金沙江下游向家坝与溪洛渡水库蓄水前后,“长江上游珍稀特有鱼类国家级自然保护区”(以下简称“保护区”)干流河道内溶解氧时空分布特征, 2012-07—2013-11(期间向家坝进行了3次蓄水,溪洛渡进行了1次蓄水),在保护区及其上下游干流布设了7个监测站点,对水温、溶解氧质量浓度等指标进行了监测和分析。结果表明: 1) 4次蓄水过程坝下断面均出现了溶解氧过饱和现象;2) 开始蓄水后溶解氧浓度与饱和度明显增加;3) 支流入汇对干流溶解氧水平会产生一定的影响;4) 河道内溶解氧溶度的增加与年际内水温周期变化及水库泄流调度引起的水气掺混有一定关系。

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关键词 溶解氧(DO)的时空分布长江上游珍稀特有鱼类国家级自然保护区水库蓄水向家坝水库溪洛渡水库    
Abstract

Dissolved oxygen (DO) is one of the important indicators of water body health. The spatial and temporal DO distribution in the main stream of the National Nature Reserve for Rare and Endemic Fish in the upper reaches of the Yangtze River after impounding of the Xiangjiaba and Xiluodu Reservoirs was analyzed using the water temperatures and DO mass concentrations at 7 monitoring sites from July, 2012 to November, 2013. During the monitoring period, the Xiangjiaba Reservoir was impounded 3 times while the Xiluodu Reservoir was impounded once. The results show that: 1) the DO is supersaturated after each impounding, 2) both the DO concentration and the saturation increase significantly after impounding, 3) the confluence of tributaries strongly impacts the DO levels in the main stream, and 4) the increased DO saturation in the river is related to the annual periodic variation of the water temperature and the water-air mixing phenomenon caused by the reservoir discharge mode.

Key wordsspatial and temporal distribution of dissolved oxygen (DO)    National Nature Reserve for Rare and Endemic Fish in the Upper Reaches of the Yangtze River    reservoir impounding    Xiangjiaba Reservoir    Xiluodu Reservoir
收稿日期: 2014-02-18      出版日期: 2015-05-15
基金资助:“十二五”国家科技支撑计划项目(2012BAC06B01);中国长江三峡集团公司经费资助项目(0799529)
引用本文:   
沈忱,吕平毓,王义成,倪广恒,冯顺新. 水库蓄水后长江上游珍稀特有鱼类国家级自然保护区干流溶解氧时空分布[J]. 清华大学学报(自然科学版), 2015, 55(1): 39-45.
Chen SHEN,Pingyu LV,Yicheng WANG,Guangheng NI,Shunxin FENG. Spatial and temporal distribution of dissolved oxygen in the main stream of the National Nature Reserve for Rare and Endemic Fish in the Upper Reaches of the Yangtze River after reservoir impounding. Journal of Tsinghua University(Science and Technology), 2015, 55(1): 39-45.
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http://jst.tsinghuajournals.com/CN/  或          http://jst.tsinghuajournals.com/CN/Y2015/V55/I1/39
  监测断面布设示意图
  2010—2011溶解氧的年内各月份均值变化情况
  在Period 1时期实测溶解氧变化曲线(2012-07-10—2012-10-09)
  在Period 1时期溶解氧饱和度SDO最值沿河段分布
监测断面编号 最大值 最小值
S1 2012-08-29 2012-09-25
S2 2012-08-28 2012-09-25
S3 2012-08-28 2012-07-18
S6 2012-08-31 2012-09-04
S7 2012-09-25 2012-08-31
  在Period 1时期溶解氧饱和度SDO最值出现日期
  在Period 2时期实测溶解氧变化曲线(2012-10-10—2013-05-03)
  在Period 2时期溶解氧饱和度SDO最值沿河段分布
监测断面编号 最大值 最小值
S1 2012-10-26 2012-10-11
S2 2012-10-26 2013-03-13
S3 2012-10-26 2013-05-07
S4 2013-01-12 2013-02-20
S5 2013-02-02 2013-04-10
S6 2013-01-08 2013-02-01
S7 2013-03-11 2013-02-01
  在Period 2时期溶解氧饱和度SDO最值出现日期
  在Period 3时期实测溶解氧变化曲线(2013-05-04—2013-06-25)
  在Period 3时期溶解氧饱和度SDO最值沿河段分布
监测断面编号 最大值 最小值
S1 2013-05-08 2013-06-05
S2 2013-05-14 2013-06-05
S3 2013-05-14 2013-06-05
S4 2013-05-14 2013-06-20
S5 2013-05-07 2013-06-20
S6 2013-05-08 2013-06-18
S7 2013-06-04 2013-06-18
  在Period 3时期溶解氧饱和度SDO最值出现日期
  在Period 4时期实测溶解氧变化曲线(2013-06-26—2013-11-12)
  在Period 4 时期溶解氧饱和度SDO最值沿河段分布
监测断面编号 最大值 最小值
S1 2013-09-12 2013-07-15
S2 2013-09-12 2013-07-15
S3 2013-09-12 2013-06-30
S4 2013-08-22 2013-07-15
S5 2013-09-05 2013-06-30
S6 2013-08-16 2013-08-12
S7 2013-11-05 2013-08-12
  在Period 4时期溶解氧饱和度SDO最值出现日期
  各时期计算溶解氧的均值变化
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