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Numerical Simulation of a Channel Network in a Lagoon

IP.com Disclosure Number: IPCOM000078240D
Original Publication Date: 1972-Dec-01
Included in the Prior Art Database: 2005-Feb-25
Document File: 4 page(s) / 85K

Publishing Venue

IBM

Related People

Rabagliati, R: AUTHOR

Abstract

This program performs the simulation of water basins which can be represented as a network of canals.

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Numerical Simulation of a Channel Network in a Lagoon

This program performs the simulation of water basins which can be represented as a network of canals.

The solution results from the parametrization of the problem with regard to:

a) the physicogeometrical description of the system, and

b) the choice of the numerical algorithm.

The program is of the interactive type in the sense that during a simulation both the physicogeometrical parameters and the techniques of numerical resolution can be modified, either automatically or not. The output is the tabulation of the heights and speed of the water at the points of the network which describes the system.

The entire program is articulated in 12 logical blocks which have the following functions (see the figure):
NETWORK: prearranges the network of canals for the simulation of the basin,

INPUT: supplies the model with input data, ROUGHNESS: constitutes the space-time distribution of the roughness coefficients for the evaluation of the

loss of energy due to the friction

INCOND: defines the initial configuration of the heights and velocities of the water,

SIMPAR: simulation parameters,

AUTOVAR: system for the automatic variation and storage of the simulation parameters,

PRINT: section of tabulation and handling of the print at intermediate levels.

OPERA: operator check, TESTIF: file of data for the tests of comparison with the values computed from the model and the input files, ERTEST: carries out the comparison of the configurations of the heights and speeds supplied by the model at those

points in the system where the measurements are

already known,

STABIT: tests for control of stability, and MATMO: produces the set of numerical algorithms for the resolution of the partial differential equations,

The program is realized in two versions:

a) the first follows the scheme of the figure and can

be used when control of the simulation can be exercised

through a peripheral unit (e.g. a console typewriter).

b) the second version carries out one or more simulations

but there is no possibility of interrupting the

the calculus once underway. The general problem of

the movement of water is described by the equations:

(Ima...