Process-based stochastic models are useful to simulate realistically sedimentary bodies and arrangements resulting from complex systems like fluvial meandering channelized systems. However, the processes should not be limited to the geographical domain to be simulated, since the deposits within the domain may be also influenced by the processes outside the domain. While necessarily simplified, these should be fine enough to avoid artificial border effects. An extrapolation procedure was developed, that ensures a better control of the distribution of sand throughout the deposit (e.g. an even distribution if desired). Another issue is to distribute sand preferentially in some areas (e.g. determined by seismic data). A combined use of the topography and erodibility maps was developed for this.


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