三峡水库香溪河库湾水温结构及其对春季水华的影响  

Water Temperature Structure and Impact of Which on the Bloom in Spring in Xiangxi Bay at Three Gorges Reservoir

作　　者：易仲强[1] 刘德富[1] 杨正健[1] 马骏[1] 纪道斌[2] 

机构地区：[1]三峡大学土木水电学院,湖北宜昌443002 [2]武汉大学水利水电学院,湖北武汉430072

出　　处：《水生态学杂志》2009年第5期6-11,共6页Journal of Hydroecology

基　　金：国家自然科学基金资助项目(50679038);湖北省科技攻关项目(2005AA401C38)

摘　　要：2007年9月至2008年8月对香溪河库湾进行每月1次的水温现场监测,分析研究了香溪河库湾水温结构特征,并初步探讨了水温对春季水华的影响。结果表明,整体上香溪河库湾水体下游水温高于上游,中、上游存在明显的底层温差异重流现象;垂向水温全年以正温层为主,春、夏季出现了水温分层现象;水温年变化明显,夏季高,春秋季次之,冬季最低;分析发现,水温的迅速上升是香溪河库湾2008年春季水华暴发的重要诱导因素之一,在春季水华暴发严重的区域,表征水温结构特征的水体稳定度与表层叶绿素a浓度具有较好的正相关关系,水体稳定度对春季水华暴发的强弱程度具有较大的影响。Based on the field monitoring during the period from September in 2007 to August in 2008 once a month in Xiangxi Bay, the paper analyzes water temperature structure and preliminary study on the relationship between water temperature and spring bloom. The results suggest that the water temperature in the upper reaches is higher than the lower. Positive temperature layer plays a dominant role in vertical water temperature and forms the layered temperature in spring and summer. There exist significant changes in the yearly variation of water temperature with summer 〉 spring, autumn 〉 winter. The changes of water temperature is one of the important induction factors to the spring bloom in 2008. The analysis found that the stability of water showed a good relativity to the concentration of chlorophyll-a in the surface water.

关 键 词：香溪河库湾 水温结构 时空分布 春季水华 水体稳定度 

分 类 号：X13[环境科学与工程—环境科学] X172