摘要
为探明来流变化条件下溪洛渡水库生态调度时的水温垂向分布特性,运用水温现场监测和CE-QUAL-W2模型对水温进行数值模拟的研究方法,基于实测地形和水文等数据建立溪洛渡库区的立面二维水温模型,模拟了水库在2021年1月15日—4月30日的水温动态变化过程,重点分析了生态调度期(3—4月)库区的立面二维水温分布规律及不同泄水口高程对下泄水水温的影响。结果表明:溪洛渡水库坝前水温于3月中旬开始出现温差,3月下旬表底最大垂向温差为2.02℃,垂向温度梯度在0.10℃/m以内。4月上旬、下旬水库表底最大垂向温差分别为2.41和2.81℃,垂向温度梯度在0.15℃/m以内。通过比较无叠梁门、1层叠梁门两种泄水运行工况得出,当设置1层叠梁门稳定运行时水库的平均下泄水水温提高了0.13℃。本研究可为溪洛渡水库后续的水温生态调度试验提供科学依据。
In order to find out the vertical distribution characteristics of water temperature in Xiluodu Reservoir during ecological regulation period under the condition of inflow change,a two-dimensional water temperature model of Xiluodu Reservoir was established based on the measured topographic and hydrological data using the research methods of on-site water temperature monitoring and CE-QUAL-W2 water temperature numerical simulation.The dynamic change process of water temperature of the reservoir from January 15 to April 30,2021 was simulated,and the two-dimensional water temperature distribution law of the reservoir area and the influence of different outlet elevations on the discharge water temperature during the ecological regulation period(March to April)were emphatically analyzed.Results showed that the temperature difference between the surface and bottom water in front of the dam of Xiluodu Reservoir occurred in mid-March,which reached 2.02℃ in late March,and the vertical temperature gradient was within 0.10℃/m.In April,the maximum vertical temperature difference grew even larger,which reached 2.41℃ in early April and 2.81℃ in late April,and the vertical temperature gradient was within 0.15℃/m.By comparing the two operating conditions of no stacked beam door and one stacked beam door,it was concluded that the average discharge water temperature of the reservoir increased by 0.13℃ when the stacked beam door was in operation.The research results can provide some technical support for the follow-up experiments of water temperature ecological regulation of Xiluodu Reservoir.
作者
戴凌全
张青森
任玉峰
陈磊
姜伟
戴会超
汤正阳
DAI Lingquan;ZHANG Qingsen;REN Yufeng;CHEN Lei;JIANG Wei;DAI Huichao;TANG Zhengyang(Yangtze River Eco-environmental Engineering Research Center,China Three Gorges Corporation,Beijing 100038,China;Hubei Key Laboratory of Three Gorges Project for Conservation of Fishes,Yichang 443100,China;Hubei Field Observation and Scientific Research Stations for Water Ecosystem in Three Gorges Reservoir,Yichang 443002,China;Hubei Key Laboratory of Intelligent Yangtze and Hydroelectric Science,China Yangtze Power Co.,Ltd.,Yichang 443133,China)
出处
《水资源与水工程学报》
CSCD
北大核心
2023年第5期132-139,共8页
Journal of Water Resources and Water Engineering
基金
国家重点研发计划项目(2022YFC3204205)
流域水循环模拟与调控国家重点实验室开放基金项目(IWHR-SKL-KF202010)
国家自然科学基金青年基金项目(52109013)。
关键词
水库生态调度
水温分层
来流条件
下泄水水温
数值模拟
溪洛渡水库
ecological regulation of reservoir
water temperature stratification
inflow condition
discharge water temperature
numerical simulation
Xiluodu Reservoir
