The temperature of Sanfutian Reservoir is 38 degrees?

20 degrees. According to the weather network, the specific heat capacity of water is very large, and there is little difference between the absorbed heat and the released heat, so when the summer temperature is 38 degrees, the river water temperature is 20 degrees. Specific heat capacity is the heat capacity of a substance per unit mass, that is, the heat absorbed or released by an object per unit mass when it changes its unit temperature.