义乌岩口水库富营养化综合评价及水环境容量分析  

Comprehensive Eutrophication Evaluation and Water Environment Capacity Analysis of Yiwu Yankou Reservoir

作　　者：黄振华 邵志平 史新明 何怡[1,2,3] 郑效旭 王靖霖 姜参参 田哲[1,2] 徐圣君 王东升[3,4] 庄绪亮 HUANG Zhen-hua;SHAO Zhi-ping;SHI Xin-ming;HE Yi;ZHENG Xiao-xu;WANG Jing-lin;JIANG Can-can;TIAN Zhe;XUSheng-jun;WANG Dong-sheng;ZHUANG Xu-liang(Research Center for Eco-Environmental Sciences,Chinese Academy of Sciences,Beijing 100085,China;University of Chinese Academy of Sciences,Beijing 100049,China;Yangtze River Delta Research Center for Eco-Environmental Sciences,Yiwu 322000,China;School of Environment and Resources,Zhejiang University,Hangzhou 310058,China)

机构地区：[1]中国科学院生态环境研究中心,北京100085 [2]中国科学院大学,北京100049 [3]长三角(义乌)生态环境研究中心,义乌322000 [4]浙江大学环境与资源学院,杭州310058

出　　处：《环境科学》2024年第12期7073-7081,共9页Environmental Science

基　　金：环境模拟与污染控制国家重点联合实验室(中国科学院生态环境研究中心)自由申请项目(21Z02ESPCR)。

摘　　要：河流和湖库等水体中氮、磷等营养元素大量累积,是目前水体富营养化的主要原因之一,由此引发的“水华”等问题的频繁周期性暴发造成了较大的生态风险.水体富营养化评价与水环境容量分析是综合评估水体富营养化程度的重要环节,同时也是当前管理水环境的重要参考依据.通过2020年5月至2022年3月对岩口水库流域多项理化指标进行逐月监测,开展富营养化综合评价以及主要污染物(高锰酸盐、总氮和总磷)的水环境容量计算.结果表明,岩口水库及上游河流的水质呈现出较明显的季节性变化规律,且夏季水库表层、中层和深层水体水质指标之间有显著差异.通过水环境容量分析表明,氮、磷是岩口水库流域水体管理的重点.综合营养状态指数法显示,上游河流的富营养化程度明显改善,处于中营/寡营养状态,水库表层水体在春、夏季出现轻度富营养化状态.最后,提出了未来岩口水库流域水体污染和富营养化防治的工作重心.研究可为岩口水库水质评价与保护、水污染物防控以及水环境可持续发展提供重要支撑.The accumulation of excessive nitrogen,phosphorus,and other nutrients in rivers,lakes,and reservoirs has greatly accelerated eutrophication,which has led to the frequent outbreaks of algal blooms and brought great ecological risks to the related aquatic ecosystems.Evaluations on the eutrophic status of water bodies and estimations of water environment capacity are not only crucial for comprehensive assessment of eutrophic status but also indispensable references for comprehensive management of the aquatic ecosystems.In this study,major environmental variables(chemical oxygen demand,total nitrogen,and total phosphorus)of Yankou Reservoir watershed were monitored monthly from May 2020 to March 2022 and based upon the determined results,the comprehensive eutrophic conditions and water environment capacity were evaluated and estimated.The results showed that the water quality of Yankou Reservoir and upstream rivers exhibited an obvious seasonal variation pattern and during summer,the water qualities of the surface,mesosphere,and understratum of Yankou Reservoir showed significant differences.Estimations on the water environment capacity indicated that nutrients of nitrogen and phosphorus were currently the management focus for the Yankou Reservoir watershed.Integrated evaluation of eutrophic conditions exhibited that the upstream rivers were fundamentally improved to a mesotrophic or oligotrophic state,whilst the surface water of Yankou Reservoir was down to a mild eutrophication state in spring and summer.Based on this study,future treatment and management focuses on controlling water pollution and eutrophication in Yankou Reservoir were proposed.This study provided supportive reference for scientific evaluation and protection of water qualities,control and prevention of water pollutants,and sustainable development of the aquatic environment in Yankou Reservoir.

关 键 词：水库 水体富营养化 水环境容量 综合营养状态指数 水环境可持续发展 

分 类 号：X524[环境科学与工程—环境工程]