| 天目湖沙河水库热分层变化及其对水质的影响 |
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| 引用本文： | 孙祥,朱广伟,笪文怡,余茂蕾,杨文斌,朱梦圆,许海,国超旋,余丽,李恒鹏,李慧赟.天目湖沙河水库热分层变化及其对水质的影响[J].环境科学,2018,39(6):2632-2640. |
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| 作者姓名： | 孙祥 朱广伟 笪文怡 余茂蕾 杨文斌 朱梦圆 许海 国超旋 余丽 李恒鹏 李慧赟 |
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| 作者单位： | 中国科学院南京地理与湖泊研究所湖泊与环境国家重点实验室;安徽师范大学环境科学与工程学院;西华师范大学环境科学与工程学院 |
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| 基金项目： | 国家重点研发计划项目（2017YFC0405201）；中国科学院前沿科学重点研究项目（QYZDJ-SSW-DQC008）；国家自然科学基金项目（41671494，41501532） |
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| 摘 要： | 为揭示亚热带水库热分层的季节性变化特征、影响因素及水质效应,以最大水深11 m的江苏溧阳天目湖沙河水库为例,基于对水库坝前区(TM1)3~11月逐时的水温监测及对该水库2009~2016年相关水质和气象指标监测,分析了该水库热分层的形成和消失时间、驱动因素及其对水质的影响.结果表明,天目湖沙河水库呈典型的亚热带单循环混合模式:春季随着太阳辐射的增强,水温逐渐升高,当表层水温升至21℃左右时,热分层稳定形成,在整个5~9月期间水体热分层十分稳定;秋季随着太阳辐射的减弱,水温逐渐降低,当表层水温降至19℃左右时,热分层基本消失,在10~4月期间水体呈混合状态.热分层期间,表层和底层的水温差随太阳辐射的增强而增加;日均气温超过30℃的情况下,水体热分层更加稳定;夏季强降雨过程降低了水体表层的温度、减弱了上层5 m水体的温度分层,但对5 m以下深度的热分层状况基本无影响.水温分层对水库水质产生一定的影响:热分层期间,底层水体处于厌氧状态,底层水体氨氮浓度明显增加;热分层消失后,底层水体溶解氧、总磷及悬浮颗粒物含量均增加.研究表明,对于四季分明的亚热带中等深度的水库而言,水体热分层主要受太阳辐射的控制,稳定的热分层有利于蓝藻门相关种属藻类的生长,热分层形成及消散阶段改变了沉积物的营养盐释放及供给水体的强度,对水体水质形成冲击.在水库水质监控及生态保护管理中,应关注热分层过程的不利影响,并探索相关灾害的防控技术.
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| 关 键 词： | 亚热带水库 热分层 极端天气事件 浮游植物 富营养化 |
| 收稿时间： | 2017/10/28 0:00:00 |
| 修稿时间： | 2017/12/6 0:00:00 |
Thermal Stratification and Its Impacts on Water Quality in Shahe Reservoir, Liyang, China |
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| SUN Xiang,ZHU Guang-wei,DA Wen-yi,YU Mao-lei,YANG Wen-bin,ZHU Meng-yuan,XU Hai,GUO Chao-xuan,YU Li,LI Heng-peng and LI Hui-yun.Thermal Stratification and Its Impacts on Water Quality in Shahe Reservoir, Liyang, China[J].Chinese Journal of Environmental Science,2018,39(6):2632-2640. |
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| Authors: | SUN Xiang ZHU Guang-wei DA Wen-yi YU Mao-lei YANG Wen-bin ZHU Meng-yuan XU Hai GUO Chao-xuan YU Li LI Heng-peng and LI Hui-yun |
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| Institution: | State Key Laboratory of Lake Environment and Science, Nanjing Institute of Geography and Limnology, Chinese Academy of Sciences, Nanjing 210008, China;College of Environmental Science and Engineering, Anhui Normal University, Wuhu 241003, China,State Key Laboratory of Lake Environment and Science, Nanjing Institute of Geography and Limnology, Chinese Academy of Sciences, Nanjing 210008, China,College of Environmental Science and Engineering, China West Normal University, Nanchong 637009, China,College of Environmental Science and Engineering, China West Normal University, Nanchong 637009, China,College of Environmental Science and Engineering, Anhui Normal University, Wuhu 241003, China,State Key Laboratory of Lake Environment and Science, Nanjing Institute of Geography and Limnology, Chinese Academy of Sciences, Nanjing 210008, China,State Key Laboratory of Lake Environment and Science, Nanjing Institute of Geography and Limnology, Chinese Academy of Sciences, Nanjing 210008, China,State Key Laboratory of Lake Environment and Science, Nanjing Institute of Geography and Limnology, Chinese Academy of Sciences, Nanjing 210008, China,State Key Laboratory of Lake Environment and Science, Nanjing Institute of Geography and Limnology, Chinese Academy of Sciences, Nanjing 210008, China,State Key Laboratory of Lake Environment and Science, Nanjing Institute of Geography and Limnology, Chinese Academy of Sciences, Nanjing 210008, China and State Key Laboratory of Lake Environment and Science, Nanjing Institute of Geography and Limnology, Chinese Academy of Sciences, Nanjing 210008, China |
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| Abstract: | |
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| Keywords: | sub-tropical reservoir thermal stratification extreme weather event phytoplankton eutrophication |
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