光照强度及温度对青草沙水库蓝藻暴发风险的模拟试验  

Simulation Experiment in Different Light Intensity and Temperature Gradients for Risk of Blue-Green Algae Outbreak in Qingcaosha Reservoir

作　　者：任翔宇[1] 王铭玮[1] 顾詠洁[1] 杨凯[1] 徐启新[1] 

机构地区：[1]华东师范大学环境科学系,上海市城市化生态过程与生态恢复重点实验室,上海200062

出　　处：《净水技术》2012年第4期55-60,共6页Water Purification Technology

基　　金：青草沙水库藻类变化规律与生物预控关键技术研究(09DZ120010A);上海市环保科研项目(沪环科2010-10)

摘　　要：青草沙水源地正成为上海市新兴的重要水源地，其水源安全直接影响地区安全和发展，蓝藻暴发㈣是危害其水源安全的重要方面。以长江中下游地区常见的铜绿微囊藻、四尾栅藻作为试验藻种，选择光照强度、温度为影响因子，设计不同因素水平进行室内单因素模拟试验和原水稳态模拟试验，并结合青草沙水库实际水质水文条件进行分析，以寻找该地区蓝藻生长的优势条件。结果表明铜绿微囊藻比四尾栅藻对温度变化更敏感；铜绿微囊藻在低光照下有较高的适应性和较高的比增殖速率，四尾栅藻对强光照更为敏感；在3300—6600lux、24℃的青草沙原水中，铜绿微囊藻倍增周期为20d左右，对温度变化较光照变化更敏感。应加强青草沙水库库首、滞水区等局部水域水质监测，并据此及时提出预警和防范措施，同时应在夏季预期有持续高温晴天出现时提高预警级别，防范持续日照增长后蓝藻暴发。As Qingcaosha Reservoir is becoming a new important water source in Shanghai, its safety and water quality affects regional security and development directly. Blue-green algae bloom is one of key factors which is harmful to water safety. Simulation experiments to explore single factors of different gradients of temperature and light intensity and at the same time experiment were carried out in raw water. By those experiments and hydrological environment favorable environment for Cyanobacteria growing was studied. Microcystis aeruginosa （hereinafter called ＂M＂） and Scenedesmus quadricauda （hereinafter called ＂S＂） were used as experi- mental subjects, and light intensity and temperature were used as impact factors in this experiment. The results show M is more sensitive to temperature changing than S; under low light intensity M has higher adaptation and higher specific growth rate while S is more sensitive to high light intensity; doubling time of M is 20 d in raw water under condition of 3 300-6 600 lux and 24 ~C; water quality monitoring in local waters including head area and retention area should be enhanced, on the basis of which effective preventive measures should be put forward, and early warning level should be upgraded when continuous hot sunny weather is expected in summer.

关 键 词：蓝藻暴发 温度 光照强度 青草沙水库 模拟 

分 类 号：TU991[建筑科学—市政工程]