American Society of Civil Engineers


Transient Finite Element Shallow Lake Circulation


by Frank D.L. Young, (Research Assoc., School of Civ. and Environmental Engrg., Cornell Univ., Ithaca, N.Y.) and James A. Liggett, M.ASCE, (Prof., School of Civ. and Environmental Engrg., Cornell Univ., Ithaca, N.Y.)

Journal of the Hydraulics Division
, Vol. 103, No. 2, February 1977, pp. 109-121

     Purchase Information
     Permissions for Reuse  

Document type: Journal Paper
Abstract: The paper presents a fast method of computing the three-dimensional time-dependent circulation in shallow homogeneous lakes. The Laplace tranform is used to remove the time dependence and enable a vertical integration of the basic equations. The resulting two-dimensional problem is treated numerically by a finite element analysis. The method then employs a numerical transform inversion in order to return to the physical variables. The result is a technique which is more than an order of magnitude faster than the time stepping method. Numerical results are compared to those obtained by other methods.


ASCE Subject Headings:
Lakes
Shallow water
Water circulation
Finite element method
Transients