取水口高程对水库水温结构的影响研究

大型水库水温分层现象引起的低温水下泄问题对下游生态环境造成了不利影响，采用分层取水是目前减缓低温水下泄的有效措施，而不同的取水口高程对水库水温的分层产生不同影响。为研究不同取水口高程对水库水温结构的分层影响，以某流域中型水库为例，选取5种不同取水口高程进行工况设计，采用三维水动力－水温数学模型，利用验证可行的数值模拟方法进行数值模拟计算和结果比对分析。结果表明，取水口高程因素对水库水温结构影响较为明显，各取水口位置对应的水库水温结构四季差异性较强。

Study on Influence of Intaking Height on Thermal Structure in Reservoirs

The lower temperature discharging to the lower reaches of rivers caused by layering of water temperature in large reservoirs has an adverse effect on the ecosystem of the lower reaches of rivers. Taking multi layered intaking is an effective measure to relieve the adverse effect. However, different intaking elevation causes different effect on the layering of water temperature. To study the effect of different intaking elevation on the water temperature distribution in reservoirs, take an medium sized reservoir for an example. Five different taking elevations are designed. A feasible three dimensional hydrodynamic water temperature numerical model is developed to simulated calculation and comparative analysis. The results show that intaking elevation has obvious effect on the water temperature distribution in the reservoirs, and the water temperature distribution based on different intaking elevation has obvious seasonal difference.