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Vertical Distribution of Dissolved Oxygen and Chlorophyll-a and Its Influencing Factors in Xiangxi River Reservoir Bay in Summer
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Yi CHEN1a, 1b, Ya-qin YAO2, Yi-ping LI1a, 1b, Ya-nan HUANG1a, 1b, Xing-xing ZHAO3, Hai-bo XU4
Water Resources and Power | 2023, 41(4) : 69 - 72
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Water Resources and Power | 2023, 41(4): 69-72
• HYDROLOGY, WATER RESOURCES AND ENVIRONMENT •
Vertical Distribution of Dissolved Oxygen and Chlorophyll-a and Its Influencing Factors in Xiangxi River Reservoir Bay in Summer
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Yi CHEN1a, 1b, Ya-qin YAO2, Yi-ping LI1a, 1b, Ya-nan HUANG1a, 1b, Xing-xing ZHAO3, Hai-bo XU4
Affiliations
  • 1a.College of Environment, Ministry of Education, Hohai University, Nanjing 210098, China
  • 1b.Key Laboratory of Integrated Regulation and Resource Development on Shallow Lakes, Ministry of Education, Hohai University, Nanjing 210098, China
  • 2.Nanjing Bureau of Water in Gaochun District, Nanjing 211301, China
  • 3.College of Hydraulic and Environmental Engineering, China Three Gorges University, Yichang 443002, China
  • 4.Zhejiang Institute of Hydraulics & Estuary, Hangzhou 310020, China
Published: 2023-04-25 doi: 10.20040/j.cnki.1000-7709.2023.20221029
Outline
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In order to understand the temporal and spatial characteristics of blooms in the Three Gorges Reservoir, the temporal and spatial changes of dissolved oxygen, Chlorophyll-a and other indicators were analyzed, and the growth characteristics of algae was screened, which can provide reference for the early warning of blooms under the condition that no blooms occurred in Xiangxi River bay of the Three Gorges Reservoir in June 2020. The results show that the thermocline and the surface layer of the inverted weight current block the vertical hydrodynamic exchange, and then promote the presence of oxygen thermocline at the bottom of the water surface. Consecutive sunny days in summer may increase the chance of bloom outbreaks from 7:00 to 11:00 and from 14:00 to 17:00. There is a lag in bloom outbreak. Algae growth cannot be characterized only by the density of algae in monolayer water, so it is necessary to use the average density of algae in the vertical migration range for further bloom warning.

Xiangxi River  /  vertical distribution  /  diurnal variation  /  summer  /  Chlorophyll-a
Yi CHEN, Ya-qin YAO, Yi-ping LI, Ya-nan HUANG, Xing-xing ZHAO, Hai-bo XU. Vertical Distribution of Dissolved Oxygen and Chlorophyll-a and Its Influencing Factors in Xiangxi River Reservoir Bay in Summer[J]. Water Resources and Power, 2023 , 41 (4) : 69 -72 . DOI: 10.20040/j.cnki.1000-7709.2023.20221029
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Year 2023 volume 41 Issue 4
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Article Info
doi: 10.20040/j.cnki.1000-7709.2023.20221029
  • Receive Date：2022-05-16
  • Online Date：2026-01-27
  • Published：2023-04-25
Article Data
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History
  • Received：2022-05-16
  • Revised：2022-07-01
Funding
Affiliations
    1a.College of Environment, Ministry of Education, Hohai University, Nanjing 210098, China
    1b.Key Laboratory of Integrated Regulation and Resource Development on Shallow Lakes, Ministry of Education, Hohai University, Nanjing 210098, China
    2.Nanjing Bureau of Water in Gaochun District, Nanjing 211301, China
    3.College of Hydraulic and Environmental Engineering, China Three Gorges University, Yichang 443002, China
    4.Zhejiang Institute of Hydraulics & Estuary, Hangzhou 310020, China
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https://castjournals.cast.org.cn/joweb/sdnykx/EN/10.20040/j.cnki.1000-7709.2023.20221029
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表12种不同金属材料的力学参数
科
Family		 属数
Number of
genus		 种数
Number of
species		 占总种数比例
Percentage of
total species (%)		 属
Genus		 种数
Number of
species		 占总种数比例
Percentage of total
species (%)
鹅膏菌科Amanitaceae 2 11 5.26 鹅膏菌属 Amanita 10 4.78
小菇科 Mycenaceae 2 12 5.74 丝盖伞属 Inocybe 5 2.39
多孔菌科 Polyporaceae 8 14 6.70 蜡蘑属 Laccaria 5 2.39
红菇科 Russulaceae 3 23 11.00 小皮伞属 Marasmius 6 2.87
小菇属 Mycena 11 5.26
光柄菇属 Pluteus 5 2.39
红菇属 Russula 17 8.13
栓菌属 Trametes 5 2.39
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