• 关键词：水库  富营养化  蓝藻水华  明矾浆  鲢、鳙鱼  生态工程

• 基金项目：中科院地理科学与资源所知识创新工程领域前沿项目(CX10GA0006);浙江省自然科学基金项目(300280)

• 陆开宏
• 宁波大学生命科学与生物工程学院, 宁波　315211

• 晏维金
• 中国科学院地理科学与资源研究所

• 苏尚安
• 温州市苍南县环境保护局

• 摘要：1997年和1998年夏季桥墩水库相继发生大面积蓝藻水华.1998年9月1m²水面喷洒38.8g改性明矾浆应急除藻, 当年蓝藻水华基本消失.1998年底和1999年初, 1hm²水面放养尾重20g左右鲢、鳙鱼种1200尾.1999年仅局部发生蓝藻水华, 8月份水库浮游蓝藻数量比1998年同期下降77.7%, 透明度提高15m;2000和2001年水库不再出现蓝藻水华, 水体表观质量明显提高, 与1998年8月同期比较, 透明度提高24m, 总氮下降61.1%, 总磷下降59.4%, 浮游蓝藻总量由1998年的10⁴35.5×10⁴个细胞L下降至143.3×10⁴个细胞L, 蓝藻个体数量比例从1998年的99.2%下降至31.5%.水体富营养状况从治理前的中—富营养类型恢复到中—贫营养类型.

• Abstract：The blue green algae bloom broke out in the summer of 1997 and 1998 in Qiaodun reservoir. The emergency dealing with the “bloom" by insufflating ameliorated alum plasm of 38.8g each square meter of water was carried out in Sept. of 1998 and the “bloom" disappeared this year. 1200 seedlings of silver carp and bighead with individual weight of 20g per hectare water were cultured in the waterbody during the end of 1998 to the beginning of 1999. The cell number of Cyanophyceae in Aug. of 1999 descended by 77.7 percent and the transparency heightened 1.5 meters according to the corresponding period of 1998. The blue green bloom appeared no longer in 2000 and 2001, and the sight of water meliorated apparently. Compared with the corresponding period of 1998, The transparency in Aug. of 2000 heightened 2 4 meters, of T N and T P decreased by 61.1 and 59.4 percent respectively. The cell number of Cyanophyceae dropped to 143.3×10⁴ per liter from 10435.5×10⁴ per liter of 1998. The number proportion of Cyanophyceae dropped to 31.5 percent from 99.2 percent of 1998. The water status of eutrophication got back to medium dystrophic type from medium eutrophic type of 1998.

• Key words：reservoir  eutrophication  blue green bloom  alum plasm  Hypophthalmichthys molitrix  Aristichthys nobilis  ecological enginee ring

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