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A general method for generating bathymetric data for hydrodynamic computer models

January 1, 1994

To generate water depth data from randomly distributed bathymetric data for numerical hydrodymamic models, raw input data from field surveys, water depth data digitized from nautical charts, or a combination of the two are sorted to given an ordered data set on which a search algorithm is used to isolate data for interpolation. Water depths at locations required by hydrodynamic models are interpolated from the bathymetric data base using linear or cubic shape functions used in the finite-element method. The bathymetric database organization and preprocessing, the search algorithm used in finding the bounding points for interpolation, the mathematics of the interpolation formulae, and the features of the automatic generation of water depths at hydrodynamic model grid points are included in the analysis. This report includes documentation of two computer programs which are used to: (1) organize the input bathymetric data; and (2) to interpolate depths for hydrodynamic models. An example of computer program operation is drawn from a realistic application to the San Francisco Bay estuarine system. (Author 's abstract)

Citation Information

Publication Year 1989
Title A general method for generating bathymetric data for hydrodynamic computer models
DOI 10.3133/ofr8928
Authors J.R. Burau, R. T. Cheng
Publication Type Report
Publication Subtype USGS Numbered Series
Series Title Open-File Report
Series Number 89-28
Index ID ofr8928
Record Source USGS Publications Warehouse
USGS Organization San Francisco Bay-Delta; Pacific Regional Director's Office

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