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Identification of Key Factors and Critical Values for Production and Elimination of Water Bloom in Wuhan South Lake
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Zhen-qi LIU1, 2, Jian LI1, Shan-hu JIANG2, Yi-an HUA2, Ke-fei YANG3
Water Resources and Power | 2023, 41(12) : 41 - 44
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Water Resources and Power | 2023, 41(12): 41-44
• HYDROLOGY, WATER RESOURCES AND ENVIRONMENT •
Identification of Key Factors and Critical Values for Production and Elimination of Water Bloom in Wuhan South Lake
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Zhen-qi LIU1, 2, Jian LI1, Shan-hu JIANG2, Yi-an HUA2, Ke-fei YANG3
Affiliations
  • 1.Changjiang Water Resources Protection Institute, Wuhan 430000, China
  • 2.College of Hydrology and Water Resources, Hohai University, Nanjing 210000, China
  • 3.North China University of Water Resources and Electric Power, Zhengzhou 450000, China
Published: 2023-12-25 doi: 10.20040/j.cnki.1000-7709.2023.20230325
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The identification of key influencing factors and their critical values for the prevention and control of water bloom in lakes is of great significance. Taking Wuhan South Lake as the study area, based on hydrological, water quality and meteorological monitoring data, Pearson Correlation Analysis, Gray Correlation Analysis and Principal Component Analysis were used to screen and identify key environmental factors with high correlation with chlorophyll a concentration, and the critical values of key environmental impact factors were analyzed by the Receiver Operating Characteristic (ROC) curve method. The results show that the CODMn, total phosphorus, total nitrogen, water temperature and air temperature had strong correlations with chlorophyll a concentration and were the key factors for water bloom outbreak, with the critical values of 6.25 mg/L, 0.146 mg/L, 0.725 mg/L, 27.05 ℃ and 22.35 ℃, respectively. It was found that the accuracy of the ROC curve method for solving the critical values of CODMn, total phosphorus, total nitrogen and other environmental factors with small daily variation was better than that of environmental factors with large daily variation such as air temperature and water temperature, and the ROC curve method has a greater advantage in determining the critical values of nutrient concentrations for water blooms in lakes.

water bloom  /  key environmental factors  /  critical value  /  ROC curve method
Zhen-qi LIU, Jian LI, Shan-hu JIANG, Yi-an HUA, Ke-fei YANG. Identification of Key Factors and Critical Values for Production and Elimination of Water Bloom in Wuhan South Lake[J]. Water Resources and Power, 2023 , 41 (12) : 41 -44 . DOI: 10.20040/j.cnki.1000-7709.2023.20230325
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Year 2023 volume 41 Issue 12
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Article Info
doi: 10.20040/j.cnki.1000-7709.2023.20230325
  • Receive Date：2023-03-06
  • Online Date：2026-01-28
  • Published：2023-12-25
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History
  • Received：2023-03-06
  • Revised：2023-04-03
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Affiliations
    1.Changjiang Water Resources Protection Institute, Wuhan 430000, China
    2.College of Hydrology and Water Resources, Hohai University, Nanjing 210000, China
    3.North China University of Water Resources and Electric Power, Zhengzhou 450000, China
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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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