Simulation grid 1000x1000 heterogeneity ln10 65

Info iconThis preview shows page 1. Sign up to view the full content.

View Full Document Right Arrow Icon
This is the end of the preview. Sign up to access the rest of the document.

Unformatted text preview: l random fields K(x,y) on 1 million node grids (1000º×º1000). The XIMUL code deals more generally with Bayesian estimation and conditional simulation of 1,2,3-D random functions of space or time [Ababou et al 1994]. The unconditional generator uses the Fourier Turning Band method based on a representation theorem of Matheron (1973): see [Tompson et al. 1989] and references therein. 4 Numerical solution with the BIGFLOW code Numerical simulations of seawater intrusion are carried out using the BigFlow code BF 2000 [Ababou and Trégarot 2002]. It solves a generalized model equation for flow in heterogeneous, anisotropic, partially saturated media. It can efficiently follow multiple interacting free surfaces in 3D, and it can represent “open” or “macroporous” media [Trégarot 2000]. A vertically integrated 2D flow module is also available, including Boussinesq-Dupuit aquifer flows, free surface hydraulics based on kinematic-diffusive wave, Darcy-Forchheimer flow in rough fractures [Spiller 2004], and the seawater intrusion module SWIM2D used here. The BF 2000 code is based on implicit 3D finite volume formulation of flux divergence equations in conservative form (mixed form). It solves fully coupled transient and steady flow problems, using a single infinite time step for steady state. It uses Preconditioned Conjugate Gradients for matrix solution, and modified Picard iterations f...
View Full Document

Ask a homework question - tutors are online