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<br />Ov623 <br /> <br />.., <br /> <br />. <br /> <br />14 <br /> <br />Modelling of sand deposition in <br />archaeologically significant reaches <br />of the Colorado River in Grand <br />Canyon, USA <br /> <br />S. Wiele and M. TariZZ/) <br /> <br />. <br /> <br />14.1 Introduction <br /> <br />The construction and application of computational models provide a rigorous <br />framework for the study of river mechanics as well as for quantitative predictions <br />that can serve as the hasis for informed management decisions regarding environ- <br />mental issues. Computational models of fluvial processes are typically tailored for <br />particular applications. A balance between data availability, computational effi- <br />ciency and sufficient accuracy to meet application ends is typically required, espe- <br />cially for models intended to predict the evolution of some fluvial process over time. <br />In modelling the Colorado River in the Grand Canyon, this balance must account <br />for data limitations resulting from the remoteness of the study sites and the compu- <br />tational demands stemming from the multi-{jimensional modelling of flow fields with <br />recirculation zones. suspended sand transport and time stepping of changes in sand <br />deposits. The purpose of the Grand Canyon model is to predict deposition rates, <br />volumes and location over a range of discharges and sand supplies to anticipate the <br />consequences of the operation of Glen Canyon Dam and tributary events. <br /> <br />ComPUIQlitwI/ FhtJ DyMltlics' Appliccuiopu IJI E1tJuonm~,,'1ll H}'drllllMf <br />Edited by P.O. &u:s. S.N. l...aDt.oa R.I. FerJUSOD C 2005 Joha Wilty a: Sons. Ltd <br /> <br />. - <br />