调水工程对调蓄水库水温影响的研究

Effect of Water Transfer Project on Regulating Reservoir Water Temperature

调水工程是解决地区水资源不足或时空分布不均衡问题的必要工程措施,不同水库间通过管道和河流调水会对调蓄水库水温产生影响。采用二维水流水温数学模型模拟了吉林省引松供水工程调水对调节水库石头口门水库水温的影响。计算结果表明,调水对调蓄水库水温影响的范围、时间主要和调水量、调水温差、水库水深、入水口位置等有密切关系。引松供水工程调水量和调蓄水库的水量相比很小,调水对水库水温分布的影响有限。调水入水口位于库尾,受影响的范围基本局限于水库库尾局部范围内,水温影响在1个月内即达到平衡,对整个库区和坝前影响很小。调水工程入水口远离坝址可以减小调水对调蓄水库及下游河流的影响程度。

Water transfer project is the necessary engineering measure to solve the problem of insufficient water resources or the imbalanced spatial and temporal distribution problems. Water diversion between different reservoirs through the pipeline and river will affect the reservoir water temperature. The two-dimensional hydrodynamic-thermal mathematical model is used to simulate the influence of the Jilin Province Water Diversion Project on the water temperature of Shitoukoumen Reservoir. The results show that the effect of the project to the range and time of the reservoir water temperature regulation is closely related to the amount of water transferred, the water temperature difference, the water depth of the reservoir and the position of the water inlet. The water amount of Jilin Province Water Diversion Project is very small compared with that of the storage reservoirs, and the influence of water diversion on the water temperature distribution in the reservoir is limited. The water diversion inlet is located at the end of the reservoir. The affected area is basically limited to the local area of the reservoir tail. The impact of water temperature reaches equilibrium within one month, with little impact on the whole reservoir area and the dam. Water diversion project away from the dam site can reduce the impact of the reservoir and downstream rivers.