Quantifying the impact of release operations and weather conditions on the flow and temperature dynamics in the cascade-reservoir system
The objective of this study was to investigate the flow dynamics and temperature characteristics under different reservoir operation scenarios and weather conditions in the river-reservoir system,which can be used to set scientific guidelines for river management and conservation planning strategies.The calibrated three-dimensional model provided simulated unsteady water surface elevation,temperature,velocity and discharge at different layers (depths) in different locations.A series of operation scenarios were modeled to understand and quantify formation,propagation,and disappearance of density currents that are resulted from combinations of daily repeated large release (DRLR) of different durations and solar heating.DRLRs (140 m3/s) with longer durations pushed the bottom cold water further downstream and maintained the bottom water temperature cooler.Variations of weather conditions (e.g.,drops of air temperature and solar radiation) directly controled variations of bottom-layer water temperature.The daily drop rate of bottom temperature was related to the rate and duration of air temperature drop.Under the practice for the water turbines running at downstream,it clearly showed the shocking withdrawal and stopping effect from the downstream operation.The velocity for the whole cross-section were almost increased with same magnitude of about 0.1 m/s at GOUS and JML.
Gang Chen Yue Zhai Hui Fan Xing Fang Chuanhai Wang
College of Hydrology and Water Resources,Hohai University,Nanjing 210098,China Hydrology Bureau of Haihe River Water Conservancy Commission,Ministry of Water Resources,Tianjin,300 Department of Civil Engineering,Auburn University,Auburn,AL 36849,USA
国际会议
2018 International Symposium on Water System Operations(ISWRSO 2018)(2018年水资源系统及调度国际研讨会)
北京
英文
1-5
2018-10-12（万方平台首次上网日期，不代表论文的发表时间）