The Vertical Stratification Of Temperature And The Numerical Simulation Of Ice Temperature And Ice Thickness At The Hekou Reservoir Of Tuo County During The Freezing Period

Temperature variation of ice sheet affects its internal structure and bearing capacity.analysis the change law of vertical temperature and thermocline,model the ice thickness and ice temperature of still water,making greater contributions to personnel security of workers on ice in the pool,providing references for the modeling of flowing water ice sheet.By observing the still water ice during the freezing peroid from 2015 to 2016,of Hekou pool in Tuoertuo,collecting the data,getting the ice sheet thickness,vertical ice temperature,vertical water temperature,air temperature,etc;seeing the ice phenomenon change process;studying the thenmocline change process and change law of vertical temperature of Hekou pool during the whole freezing period,doing numerical simulation of ice temperature and ice thickness,getting corresponding mathematics model,we get the following achievements.(1)Describe ice sheet’s generating and disappearing during the ice sheet growth period and ice sheet melting period,intuitively knowing the change of ice sheet during the whole freezing period,and the influences of other condition(for example the weather)to ice sheet during the whole freezing period.(2)Analysis the reason of ice condition change during the whole freezing period of Hekou pool,and the relation of ice sheet and temperature.(3)Getting the change process and regularity of overall thermocline thickness,in-ice thermocline thickness and underwater thermocline thickness,and the reason of the change.Getting the corresponding data of thermocline and isothermal layer.(4)For vertical ice-temperature and water temperature,getting the horizontal and vertical change process and regularity of the temperature during the whole freezing period,analyzing the reason of the corresponding change and the main influence factors of irregular change of temperature gradient,and the reason of "cold mesosphere" appears.(5)Get the relation between accumulated daily average temperature and ice thickness growth。Fitting the data of freezing period,get the linear formula of accumulated daily average temperature and ice thickness growth.(6)Basing on thermodynamic theories,determining the boundary conditions,building the simulation equation of the ice temperature and ice thickness,getting the coefficient values.According to the comparison of measured value and simulation value,building the model of ice sheet thickness generating and disappearing,and the change of the temperature inside the ice,getting high-precision during the simulation,it means the model runs well in the prototype research experiments.The model provide theoretical basis for ice sheet generating&disappearing,and spatial and temporal distribution of inside temperature of ice,providing reference and new thoughts for building model of generating and disappearing of flowing water.