Dispersion in simulation models of population growth and salt movement in the soil.

Abstract

[113.413:116.113].The basic equations for mass transport of salt in the soil were analogous to those for development in a population. Both types of processes are modelled by compartmentalization. In such models with layers or classes an artificial dispersion is introduced with a coefficient vB/2, where v is the rate of transport or development and B the size of the compartment. Rectangular integration causes an additional dispersion with a coefficient -v2 DELTA t/2, where DELTA t is the time interval of integration. The artificial dispersion can be used to mimic natural dispersion. Methods for controlling or preventing artificial dispersion are discussed in relation to the method of integration used. (Abstract retrieved from CAB Abstracts by CABI’s permission)