A general method for generating bathymetric data for hydrodynamic computer models

Open-File Report 89-28
By:  and 



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)

Publication type Report
Publication Subtype USGS Numbered Series
Title A general method for generating bathymetric data for hydrodynamic computer models
Series title Open-File Report
Series number 89-28
DOI 10.3133/ofr8928
Edition -
Year Published 1989
Language ENGLISH
Publisher U.S. Geological Survey ; Books and Open-File Reports Section [distributor],
Contributing office(s) San Francisco Bay-Delta, Pacific Regional Director's Office
Description iv, 45 p. :ill. ;28 cm.
Online Only (Y/N) N
Additional Online Files (Y/N) N
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