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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。
The problem of low temperature water release caused by the stratification of large reservoirs has an adverse effect on the ecological environment in the lower reaches. Taking stratified water withdrawal is an effective measure to reduce the release of low-temperature water at present, and the different intake elevation has different effects on the stratification of reservoir water temperature . In order to study the stratification effect of different water intake elevation on the reservoir water temperature structure, taking a medium-sized reservoir in a certain basin as an example, five different water intake elevations were chosen to carry on the working condition design. The three-dimensional hydrodynamic-water temperature mathematical model was used to validate the feasibility of the numerical simulation Methods Numerical simulation and results comparison analysis. The results show that the elevation of water intakes has obvious influence on the water temperature structure of reservoirs, and the seasonal variation of reservoir water temperature structure corresponding to each water intake location is strong.