中文摘要：

溪洛渡水库是位于云南省和四川省交界处的一座大型水库,2013年开始蓄水,其最大水深接近285 m,正常运行后常年将有大部分时间处于水温分层状态。为得到溪洛渡水库在一年中垂向水温结构及年内的变化规律,2014年进行坝前垂向水温结构监测,监测数据结果证实该水库在夏季和秋季存在稳定的水温分层结构。为更好地理解溪洛渡蓄水后库内水温演替规律,引入立面二维水质水动力模型CE-QUAL-W2对溪洛渡水库水温进行模拟。模拟结果与监测结果基本一致,并清晰地揭示了溪洛渡水库水温年内变化规律。

英文摘要：

Xiluodu Reservoir is located on the border between Yunnan Province and Sichuan Province,and the initial impounding stage started in 2013,with the maximum water depth reaching up to 285 meters. During most normal operation time of a year,the reservoir presents a stable vertical temperature stratification structure. To get spatial and temporal variation of vertical temperature structure throughout a year,the vertical temperature distribution observation in front of the dam was carried out in 2014,which confirmed the existence of stable vertical temperature stratification in summer and autumn. To get better understanding of water temperature variation after impoundment,a two-dimensional longitudinal-vertical hydrodynamic and water quality model（ CE-QUAL-W2） was employed to simulate water temperature structure. The simulation result matched well with the observation,and clearly revealed the variation regulation of reservoir water throughout a year.