• 关键词：六都寨水库  富营养化  浮游植物  蓝藻水华  综合防治

• 基金项目：中央级公益性科研院所基本科研业务费专项资金（No.PM-zx021-201212-012）

• 马千里
• 环境保护部华南环境科学研究所, 广州 510655

• 胡芳
• 环境保护部华南环境科学研究所, 广州 510655

• 虢清伟
• 环境保护部华南环境科学研究所, 广州 510655

• 许振成
• 环境保护部华南环境科学研究所, 广州 510655

• 姚玲爱
• 环境保护部华南环境科学研究所, 广州 510655

• 赵学敏
• 环境保护部华南环境科学研究所, 广州 510655

• 摘要：六都寨水库是湖南省邵阳市重要的备用水源地，本文在2012年夏季对六都寨水库水体理化指标和浮游植物群落结构进行调查，评价水库富营养化状况.结果显示六都寨水库氮、磷浓度较高，TN和TP平均值分别为0.88和0.04 mg·L^-1，部分点位超过Ⅲ类水标准.调查期间库区浮游植物总细胞密度变化范围为3.68×10⁶~5.84×10⁶ cells·L^-1，水库中心区域以绿藻为主，靠近坝首处则以蓝藻为主.各点位Shannon-Wiener多样性指数（H’）介于2.19~3.17之间，Chl.a浓度范围为3.64~20.24 μg·L^-1，综合营养状态指数（TLI）为38.51~48.11，六都寨水库水体已处于中营养状态.要从根本上控制六都寨水库水体富营养化进程，防范蓝藻水华风险，需通过长期科学监控和综合防治.

• Abstract：Liuduzhai reservoir is an important back-up drinking water source of Shaoyang City, Hunan Province, China. In this study, various environmental parameters and phytoplankton composition were investigated in summer 2012, and eutrophication status of the reservoir was assessed. The results showed that TN and TP concentration was 0.88 and 0.04 mg·L^-1 respectively, which is relatively high. In some sampling points, TN and TP concentration exceeded grade Ⅲ of the ground water quality standard in China. Phytoplankton cell density was in the range of 3.68×10⁶~5.84×10⁶ cells·L^-1. Chlorophyta was the dominant alga in central area of the reservoir, and Cyanophyta was dominant alga near the dam area. Range of Shannon-Wiener index (H') was 2.19~3.17, Chlorophyll a concentration was 3.64~20.24 μg·L^-1, and Topic Level Index (TLI) was 38.51~48.11. The result indicated that the reservoir was in meso-eutrophic state. In order to control eutrophication progress and prevent cyanobacterial bloom, long-term monitoring and integrated control of pollution were needed.

• Key words：Liuduzhai reservoir  eutrophication  phytoplankton  cyanobacterial bloom  integrated pollution control

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