水库淤积前后水温结构的变化  

Change of water temperature structure under different water depth in reservoir

作　　者：范世平[1] 冯民权[1] 范术芳[2] 刘钊[1] 

机构地区：[1]西安理工大学西北水资源与环境生态教育部重点实验室,陕西西安710048 [2]山西省水利建设开发中心,山西太原030002

出　　处：《武汉大学学报（工学版）》2011年第1期69-73,共5页Engineering Journal of Wuhan University

基　　金：山西省水利厅科技计划基金资助项目(编号:2008-9-23)

摘　　要：水库中的泥沙淤积不仅减小了水库库容,而且对水库中的水温分布也产生了一定影响.以汾河水库为例,针对水库泥沙淤积现象较为严重的现状,对水库淤积前后的水温分布进行模拟预测.首先利用实际监测的水温数据对所建立的数学模型进行验证及参数率定,然后运用三维数学模型对2种条件下的水库水温进行了数值模拟,得出了汾河水库淤积前后的水温结构及全年下泄水温,并通过结果对比分析2种工况下水温结构发生变化的原因.结果表明:水库淤积前,夏季的水库水温分布的分层现象较淤积后更为明显,而且水温略高.这说明水库的水量和水深变化都会对水温结构产生影响,水深越浅,水温升高和降低的变化速度越快.Sand silt in reservoir not only decrease reservoir capacity,but also impact on the distribution of water temperature.Based on the phenomenon of sand silt in Fenhe River reservoir,the distribution of water temperature before and after deposition condition was simulated.Firstly,the measured data were used to verify the model and calibrate parameters for the three-dimensional model.And then the model was applied to simulate the water temperature in deposition condition and non-deposition condition.Water temperature structure and the whole year discharge temperature of Fenhe Reservoir were analyzed.By contrasting and analyzing water temperature structure under these two kinds of conditions,we discussed the reasons why the water temperature structure had changed.The results show that the stratification of water temperature in summer is clearer under non-deposition condition.In addition,water temperature is higher.It is shown that the flow and water depth will impact on water temperature structure.The more shallow water depth is,the rate of change in higher and lower of water temperature faster is.

关 键 词：汾河水库 水温分布 现场监测 三维数学模型 

分 类 号：TV697.21[水利工程—水利水电工程]