Study On The Numerical Simulation Of The Dissolved Oxygen Concentration In Ice-covered Lakes

About the problem dissolved oxygen for the coastal inshore waters, many researches are made both at home and abroad. But the study of dissolved oxygen under ice of freshwater lakes is not enough perfect, The article is mainly to numerical simulation problems of dissolved oxygen concentration of ice-covered lakes. We do the jobs as follow:1、According to the date of dissolved oxygen concentration and temperature under ice surveying in different depths in Finnish Valkea-kotinen every 17 min from January 14, 2011 to April 3, 2011, the dissolved oxygen coefficient for the turbulent vertical mass exchange for the dissolved oxygen coefficient for the turbulent vertical mass exchange in a one-dimensional model describing the dissolved oxygen vertical distribution of concerning ice-covered lakes, which is built by Golosov et al. is optimized and identified by using the distributed parameter system parameter identification method. Reference the dissolved oxygen coefficient for the turbulent vertical mass exchange of the lake.2、In order to checkout the dissolved oxygen coefficient for the turbulent vertical mass exchange whether accurate and effective. We use the coefficient of NO2 stance, and NO3 stance of Valkea-kotinen is used to numerically simulate the changes of dissolved oxygen concentration under the ice. The simulation results agree well with the measured data, which confirms the accuracy and effectiveness of the dissolved oxygen coefficient for the turbulent vertical mass exchange. The results give a reference to numerical simulation research under the cold lakes.