摘要
水库、湖泊水体富营养化逐年加剧,已成为水环境保护的突出问题。为掌握粤西沿海地区重要饮用水源水库富营养化趋势,保障饮用水安全,该研究以高州水库为研究对象,基于2012-2019年富营养化指标的长期监测结果,采用综合营养状态指数法,通过对水库各评价指标及综合营养状态的时空分析,建立基于W-F定律的水库富营养化预警模型,并对水库进行预警分级与评价,为水库的生态环境保护提供理论支撑与防控方法。结果表明:研究期内高州水库整体处于中营养状态,丰水期富营养化程度严重于枯水期;各单项营养状态指数中TLI(TN)呈轻度富营养状态,是水库富营养化的最大贡献者,其次为Chl a,磷营养盐及有机物对水库富营养程度影响较小。水库各监测断面的富营养状况波动相对稳定,良德大坝TLI(∑)整体低于石骨库区;而石骨库区的营养状态综合表现为库尾>供水口>库心。基于W-F定律构建了高州水库富营养化综合影响指数与营养状态指数间的预警模型,对2012-2019年不同季节下的富营养状态进行预警评价,结果显示枯水期的综合影响指数值小于丰水期,与季节变化结果相一致,说明模型预警效果较好。
The eutrophication of water in reservoirs and lakes is getting worse year by year and has become a prominent issue of water environmental protection. In order to assess the degree of eutrophication and the changing trend of important drinking water sources in the coastal areas of western Guangdong and ensure the safety of drinking water, this paper takes Gaozhou Reservoir as the research object and based on the long-term monitoring results of eutrophication index of reservoirs from 2012 to 2019, using the comprehensive nutritional status index method and through the spatial and temporal analysis of the evaluation indexes and the comprehensive nutritional status of the reservoir. Based on W-F law the early warning model of reservoir eutrophication and classification and evaluation was established, to provide theoretical support and prevention and control methods for the ecological environment protection of reservoirs. The results show that Gaozhou Reservoir was in the middle nutritive state and the degree of eutrophication was more serious in the high water period than in the low water period.TLI(TN) is the biggest contributor of reservoir eutrophication and shows mild eutrophication in each single nutrient status index, and then Chl a, phosphorus and organic matter had little effect on the degree of eutrophication. The eutrophication status of the monitored sections of the reservoir fluctuates relatively steadily, the total TLI(∑) of Liangde Dam is lower than that of Shigu Reservoir area, and the comprehensive nutritional status of Shigu area is the tail > supply port > center. Based on the W-F law, an early warning model between the comprehensive impact index of eutrophication and the nutritional status index of Gaozhou Reservoir was constructed, to evaluate eutrophication status in different seasons from 2012 to 2019, and the results show that the comprehensive influence index value of dry period is less than that of flood period and consistent with the seasonal results, so the model has good warning effect.
作者
马腾飞
罗汉金
李志敏
吴超群
黄莹波
卢新正
MA Tengfei;LUO Hanjin;LI Zhimin;WU Chaoqun;HUANG Yingbo;LU Xinzheng(Maoming Branch,Guangdong Hydrology Bureau,Maoming 525000,China;College of Environment and Energy,South China University of Technology,Guangzhou 510641,China)
出处
《环境科学与技术》
CAS
CSCD
北大核心
2020年第5期145-153,共9页
Environmental Science & Technology
基金
茂名市科技专项(190124024552851)
茂名市科技计划项目(190408161701845)。
关键词
富营养化
预警模型
高州水库
eutrophication
forewarning model
Gaozhou Reservoir
