|WORLD METEOROLOGICAL ORGANIZATION||
|Explanation of the criteria for classification and numbering of components|| K55.3.04
|Explanation of the dates on the component's description|
MATHEMATICAL MODEL FOR TWO DIMENSIONAL SALINITY DISTRIBUTION IN ESTUARIES
1. Purpose and objectives
To provide a computational method for the vertically integrated salinity distribution in an estuary. The model computes the two
dimensional horizontal velocity distribution and the variation of the tidal
water level. Some pollutant dispersion problems in rivers and estuaries can also be computed by using the scheme of this method.
The model includes two parts, that is a hydrodynamical model for solving the velocity field and a salt transport model for solving the salinity field.
The model uses the finite element method, which can easily handle the complicated topography of the river bed and bank. The explicit solution scheme by using a lumping technique may save computer storage and running time.
The Coriolis parameter, the roughness and dispersion coefficients in
the governing equations are taken into account, and an empirical
relationship between nondimensional dispersion coefficient and
Boundary data including the variation of tidal water level or tidal
velocity and salinity with time, and data on river bed topography, and
physical parameters are needed.
Calculated results, including tidal water level, velocity components
(longitudinal and transverse) and salinity distribution.
5. Operational requirements and restrictions
The chosen computer need to satisfy the requirements of storage and
running speed, which are determined by the area of calculation and number
of grid nodal.
6. Form of presentation
Program in FORTRAN and user manuals.
7. Operational experience
The model has been used in the Yangtze Estuary in China since 1982 and
the calculated results agree well with the natural data. The same method
was also used to study pollutant dispersion in this estuary in 1985 and the
comparisons between calculated results and measuring results in the
physical model and field prove that the method is successful.
8. Originator and technical support
Nanjing Hydraulic Research Institute, Nanjing, China.
10. Conditions on use
Cost of reproduction and mailing.
|(First entered:17 FEB 87||
Last updated: 6 MAY 1987)