宋策, 周孝德, 辛向文. 龙羊峡水库水温结构演变及其对下游河道水温影响[J]. 水科学进展, 2011, 22(3): 421-428.
引用本文: 宋策, 周孝德, 辛向文. 龙羊峡水库水温结构演变及其对下游河道水温影响[J]. 水科学进展, 2011, 22(3): 421-428.
SONG Ce, ZHOU Xiao-de, XIN Xiang-wen. Water temperature dynamics of Longyangxia Reservoir and its influence on downstream water temperature[J]. Advances in Water Science, 2011, 22(3): 421-428.
Citation: SONG Ce, ZHOU Xiao-de, XIN Xiang-wen. Water temperature dynamics of Longyangxia Reservoir and its influence on downstream water temperature[J]. Advances in Water Science, 2011, 22(3): 421-428.

龙羊峡水库水温结构演变及其对下游河道水温影响

Water temperature dynamics of Longyangxia Reservoir and its influence on downstream water temperature

  • 摘要: 多年调节水库由于年际运行过程的差异引起水库水温结构变化,探明其规律及对下游河道水温响应具有重要意义。以黄河龙羊峡水库为研究对象,利用水库蓄水后的1988~2008年运行过程及水温观测资料,分析了水库运行方式与水温结构变化关系,探讨了水库不同运用过程对下游河道水温的影响。研究结果表明:龙羊峡水库水温结构演变及其对下游河道水温影响程度与水库运用过程密切相关。12~3月,水温结构为弱分层或等温分布,较高水位的蓄热增温效应明显,下游河道水温与水库水位变化具有同相位关系;5~10月,水温结构为分层分布,水位是决定分层形态变化最主要因素,下游河道水温与水库水位变化具有反相位关系,同时,水位与河道水温在不同的出入库水量条件下,呈现不同的线性相关关系。11月和4月,水温结构近乎为等温状态,也是水温结构变化的转折点。研究成果为分析大型水库在不同运行条件下水温结构及下游河道水温提供一定的参考依据。

     

    Abstract: The variation in operating stages could result in a change of water temperature structure of multiyear regulating storage reservoirs.Thus,understanding of the water temperature dynamics would be essential to study the effect on the downstream water temperature.Using the observational data from the Longyangxia reservoir for the period 1988 to 2008,the variation in reservoir temperature profile and the effect of reservoir operation on the downstream water temperature are studied.The data includes operating stages and reservoir and downstream water temperatures.The result shows the variation in reservoir temperature profile and the effect of reservoir operation on the downstream water temperature is closely related to the reservoir operating scheme.From December to next March,the reservoir water temperature is either weakly stratified or uniformly distributed; higher stages can store more heat,and both reservoir water temperature and downstream water temperature change synchronously with reservoir stages.From May to October,the reservoir water structure is stratified; the stratification is mainly controlled by the reservoir stage,and the downstream water temperature is reversely related to reservoir stages.In the months of November and April,the reservoir temperature structure is rather uniform,and serves as turning points.This study provides valuable information for the determination of the temperature dynamics in large reservoirs and its influence on downstream water temperature.

     

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