抄録
In the limnological research, lake temperatrure is the most basic and important factor, but it has not been explored.
Then the author tries to treat thermal stratification of the lake in relation with other factors.
Thermal stratification in the summer stagnation is decided by the following three factors
a) convection
b) conduction
c) turbulence
The author studies the turbulence from the standpoints of the depth of the thermocline and the transportation of heat to the deeper layer.
From the results of these studies, the author wishes to conclude as follows:
1) The depth of the thermocline correlates with the length of the wind run.
2) The heat transfer to the layer 0_??_5 meters and 5_??_10 meters gradually increases from March to May and decreases in small lakes, but in large lakes, it increases from March to June.
3) Turbulence gradually decreases from spring to summer in every lake, and its decreasing rate depends upon the size of the lake.
