Influences of increased daily repeated upstream releases and varying meteorological conditions on temperature distributions in a river-reservoir system

International Conference on Water Resource and Environment 2016

地球科学;生态环境科学

Chen, G.^1 ; Fang, X.^1,2

Department of Civil Engineering, Auburn University, Auburn

AL, United States^1

Beijing Cooperative Innovation Research Center on Architectural Energy Saving and Emission Reduction, Beijing University of Civil Engineering and Architecture, Beijing, China^2

关键词: Bottom temperature;    Density currents;    Environmental fluid dynamics code;    Meteorological condition;    Monitoring stations;    River reservoirs;    Temperature drops;    Water temperatures;   

Others  :  https://iopscience.iop.org/article/10.1088/1755-1315/39/1/012058/pdf
DOI  :  10.1088/1755-1315/39/1/012058

学科分类：环境科学（综合）

来源: IOP

【 摘 要 】

Temperature distribution in a river-reservoir system was simulated using a calibrated three-dimensional Environmental Fluid Dynamics Code model under various hypothetical weather conditions and daily repeated large releases (DRLRs) from the upstream boundary. Both DRLRs and weather conditions affect and control the formation and spread of density currents and then affect the bottom-layer temperatures. The DRLRs with longer durations (e.g., 6 or 8 hours) can relatively quickly push cooler release water to the Gorgas upstream monitoring station (GOUS) and the river intake. With the air temperature drops in the first 6 days, simulated bottom temperatures at GOUS for 6- and 8-hr DRLRs are lower than one under 4-hr DRLR, but relatively larger bottom-layer temperature drops only primarily occur during the air-temperature drop and rise period. The release with larger flow rate can also maintain the cooler water temperature downstream. Releasing the same amounts of water, with different release durations and flow rates, has a very similar effect on the downstream water temperatures.