What is Terrace?
Terrace meaning (of a lake) . Vertical temperature stratification that shows the following: The upper layer of the lake, known as the epilimnion, in which the water temperature is virtually uniform; a stratum next below, known as the thermocline, in which there is a marked drop in temperature per unit of depth; and the lowermost region or stratum, known as the hypolimnion, in which the temperature from its upper limit to the bottom is nearly uniform. (Welch, 1952, p. 51.)FIGURE
reference: USGS – Water Basics GlossaryWhat is