Simulation and Analysis on Water Temperature Structure Considering the Influence of Multiple Factors of Tanghe Reservoir
To fully understand the changes in water temperature structure and the degree and scope of various factors affecting water temperature in the Tanghe reservoir area,a three-dimensional reservoir hydrodynamic model was established,and the water temperature structure was quantified using the water temperature stratification index(RWCS).The water temperature changes under different scenarios were predicted by considering various factors such as air temperature,evaporation,inflow water temperature,and flow rate.The verified model has a determination coefficient(R2)of 0.991 for measured and simulated water levels,and R2 values of 0.985,0.976,and 0.958 for measured and simulated water temperatures at the surface,middle and bottom layers,demon-strating good model accuracy.The results revealed a variation in the vertical water temperature from the end of the reservoir to the front of the dam,as well as a discrepancy in the duration of water temperature stratification.The stratification of reservoir wa-ter temperature was found to be positively correlated with air temperature and evaporation,while being negatively correlated with inflow water temperature,and the primary influence period was found to be the summer stratification period.The higher the inflow flow rate,the lower the position of runoff infiltration into the reservoir,and the greater the destruction and influence range of the thermocline,with significant weakening of water temperature stratification after large floods.
reservoir water temperaturemultiple factorswater temperature predictionhydrodynamic simulation
万方数据
维普
