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生态学杂志 ›› 2020, Vol. 39 ›› Issue (10): 3371-3378.doi: 10.13292/j.1000-4890.202010.007

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红枫湖营养水平及其历史演化趋势

郭雯1,赵俞廷2,黎宇洋1,郭建阳3*   

  1. (1西北农林科技大学资源环境学院, 陕西杨凌 712100;2西北农林科技大学机械与电子工程学院, 陕西杨凌 712100;3中国科学院地球化学研究所环境地球化学国家重点实验室, 贵阳 550081)
  • 出版日期:2020-10-10 发布日期:2021-04-09

Trophic level and its historical evolution in Lake Hongfeng, Southwest China.

GUO Wen1, ZHAO Yu-ting2, LI Yu-yang1, GUO Jian-yang3*   

  1. (1College of Natural Resources and Environment, Northwest A&F University, Yangling 712100, Shaanxi, China; 2College of Mechanical and Electronic Engineering, Northwest A&F University, Yangling 712100, Shaanxi, China; 3State Key Laboratory of Environmental Geochemistry, Institute of Geochemistry, Chinese Academy of Sciences, Guiyang 550081, China).
  • Online:2020-10-10 Published:2021-04-09

摘要: 红枫湖是贵阳市重要的饮用水源地,但水体富营养化对水质一直是很大的隐患。准确了解红枫湖营养水平对保障当地居民的饮用水安全具有重要的意义。基于2004—2018年的监测数据,采用综合营养状态指数法,借助统计学的方法,对红枫湖营养水平及其历史演化趋势进行了评估。结果表明:过去15年红枫湖营养水平总体上在中营养与轻度富营养之间波动;虽然2009年以来红枫湖的营养状况有所缓解,但2018年水体轻度富营养化的概率又明显回升;“全国一策”富营养化评估方法难以准确评估红枫湖水体营养水平,表明改进富营养化评估方法的必要性;红枫湖富营养化的风险很可能是多个因素协同作用的结果(如营养物质及其循环条件、水动力学条件和能量的因素等),目前应多关注水体水动力学条件的变化和营养物质的内循环,建立相关的预测预警技术,为红枫湖水质安全提供有力保障。

关键词: 营养水平, 综合营养状态指数, 亚深水湖泊, 影响因素

Abstract: Lake Hongfeng is an important drinking-water source for Guiyang City, where eutrophication is a potential risk to water quality. It is of great importance to understand the trophic level in the lake to ensure the drinkingwater safety. Combined with statistical analysis, we analyzed the trophic level and its evolution in the lake using the comprehensive trophic level index, based on the water quality monitoring data between 2004 and 2018. The results showed that the trophic level of the lake was largely between mesotrophication and slight eutrophication during the fifteen years. Although the trophic level has been alleviated since 2009, the probability of slight eutrophication was significantly increased in 2018. It is difficult to evaluate the trophic level accurately based on the national unified method, indicating the necessity for improving the method of trophic level assessment. The risk of eutrophication would be a result of multiple factors, including nutrients and their cycling conditions, hydrodynamic and energy conditions. More attention should be paid to the changes in water hydrodynamic conditions and the internal circulation of nutrients. Developing prediction and early warning technologies is of importance to ensure the safety of water quality in Lake Hongfeng.

Key words: eutrophication, comprehensive trophic level index, sub-deep lake, influencing factor.