00000nam 2200000zi 4500 9.873475 CaOODSP 20241203113649 m o d f cr bn||||||||| 190523s1997 onca ob f000 0 eng d CaOODSP eng rda CaOODSP n-cn--- En13-5/97-142E-PDF Crowe, Allan, 1952- author. A grid generating algorithm for simulating a fluctuating water table boundary in heterogeneous unconfined aquifers / by A.S. Crowe, S.G. Shikaze and F.W. Schwartz. [Ottawa] : Environment Canada, Water Science and Technology Directorate = Environnement Canada, Direction générale des sciences et de la technologie, eau, 1997. 1 online resource (15 pages, 6 unnumbered pages) : illustrations. text txt rdacontent computer c rdamedia online resource cr rdacarrier NWRI contribution ; no. 97-142 "For submission to: Advances in Water Resources." "December 1997." Digitized edition from print [produced by Environment and Climate Change Canada]. Includes bibliographical references. "A method for generating finite element grids that calculates the position of a fluctuating water table and the formation of seepage faces within a heterogeneous unconfined aquifer is described. Our approach overcomes limitations with existing techniques, with respect to numerical accuracy and heterogeneities, by allowing the water table to rise or decline through hydrostratigraphic boundaries, yet maintain numerical and conceptual accuracy with respect to hydrostratigraphic geometry. The algorithm involves (1) a limited stretching of elements along the water table if the change in the position of the water table is small with respect to the vertical grid spacing, and (2) the addition or removal .of nodes and elements to the finite element mesh along the water table as the change becomes large with respect to the vertical grid spacing. This technique is applicable to any 2-D or 3-D finite element code that contains an automatic finite-element grid generator"--Abstract, page 2. gccst Groundwater Shikaze, Steven G. (Steven Grant), 1966- author. Schwartz, F. W. (Franklin Walter) author. Canada. Environment Canada. Canada. Water Science and Technology Directorate. Ohio State University. Department of Geological Sciences‏. National Water Research Institute (Canada) NWRI contribution ; no. 97-142. (CaOODSP)9.844121 PDF 1.06 MB https://publications.gc.ca/collections/collection_2019/eccc/en13-5/En13-5-97-142-eng.pdf