Examination of the Thermocline

by John C. Sonnichsen, Jr., (A.M.ASCE), Development Engr.; Water and Land Resour. Dept., Battelle-Northwest, Richland, WA,
Clarence A. Oster, Sr. Res. Sci.; Appl. Math. Dept., Battelle-Northwest, Richland, WA,

Serial Information: Journal of the Sanitary Engineering Division, 1970, Vol. 96, Issue 2, Pg. 353-364

Document Type: Journal Paper

Discussion: Choi Yu-Leuk (See full record)
Discussion: Edinger John E. (See full record)
Closure: (See full record)


A mathematical model is used to simulate the development of a thermocline in a relatively quiescent body of water. A sensitivity analysis is performed on the light extinction coefficient and the thermal diffusivity to demonstrate the relative importance of each. Using measurements collected from Pend Oreille Lake in northern Idaho, a simulation is obtained. The Runge Kutta technique used to solve the diffusion type equation indicates the light extinction coefficient to be of primary importance.

Subject Headings: Diffusion (thermal) | Sensitivity analysis | Thermal analysis | Hydrologic models | Mathematical models | Mathematics | Lakes | Simulation models | Idaho | North America | United States

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