| 亚热带深水水库——龙滩水库季节性分层与富营养化特征分析 |
| 摘要点击 3464 全文点击 1487 投稿时间：2014-06-30 修订日期：2014-09-13 |
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| 中文关键词 季节性 分层特征 富营养化 深水水库 龙滩水库 |
| 英文关键词 seasonal stratification eutrophication deep reservoir Longtan Reservoir |
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| 中文摘要 |
| 为揭示亚热带大型深水水库——龙滩水库水体季节性分层和富营养化特征,于2012年11月(枯水期),2013年4月(平水期)和7月(丰水期)对其环境因子及富营养化指标进行研究. 结果表明:①龙滩水库分层结构呈不完全混合型湖泊特征,枯水期为单温跃层结构,表层至60 m为混合层,60~80 m为温跃层,80 m以后为永滞层. 平水期和丰水期为双温跃层结构,表层到10 m为混合层,10~20 m为温跃层,20~40 m为混合层,40~60 m为次温跃层,60 m以后为混合层. ②水温分层主导其它环境因子的分层结构,分层结构限制了水体上下对流,尤其永滞层的存在减少了内源污染的危害. ③水库枯水期综合营养指数(TLI)在23.4~32.8之间,平水期在27.1~38.6之间,丰水期在26.0~45.1之间,均呈贫营养到中营养状态,其中总氮营养状态指数TSIc(TN)在60.3~72.5之间,呈富营养到重度富营养状态,氮磷比为107:1,呈磷限制型. |
| 英文摘要 |
| In order to reveal the seasonal stratification and eutrophication characteristics of the subtropical large deep reservoir-Longtan Reservoir, the spatial and temporal distribution of environmental factors and eutrophic index were investigated during November (dry period) 2012, April (level period) and July (wet period) 2013.The results suggested that:①The stratification structure of Longtan Reservoir was meromictic lake, it had a single thermocline structure in the dry season, the surface layer to the 60 m was a mixomolimnion, 60-80 m was a thermocline, deeper more than 80 m was a monimolimnion. It had a double thermocline structure in flow period and wet period, the surface to 10 m was a mixed layer, 10-20 m was a thermocline, 20-40 m was a mixed layer, 40-60 m was a thermocline, deeper more than 60 m was a mixed layer. ②The thermal stratification dominated the structure of other environmental factors, the stratification structure limited the water convection, especially the monimolimnion reduced the harm of the endogenous pollution. ③The trophic level index (TLI) was 23.4-32.8 in the dry period, 27.1-38.6 in the flow period and 26.0-45.1 in the wet period, which were all Mesotropher. The trophic state index of total nitrogen was 60.3-72.5,which was eutropher to hyper eutropher, N:P was 107:1,which was phosphorus limited. |
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