Le couplage itratif consiste faire des changes entre

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: sing the turning band method (Tompson et al., 1989). Step 2: we simulate seawater intrusion with the SWIM2D module for this first lnK field. Step 3: we increase the heterogeneity of lnK by incrementing σln(K) while maintaining the other parameters constant. Step 4: we simulate seawater intrusion using the lnK field from step 3. Steps 3 and 4 are then iterated. Since the numerical difficulty increases as σlnK increases, we use a logarithmic function to control the σlnK increment: σi ln(i + 1) = σ N ln( N + 1) (5) where σi is the standard deviation of the ith lnK field, N is the number of increments, σN is the standard deviation of the objective (final) standard deviation. Other incremental functions have been tested; the logarithmic increment proved to be the most efficient. Fig. 1(a) shows the values of σlnK for 10 continuation steps (final value σlnK = 4.0). The results are analysed in Fig. 1(b), in terms of error norm vs iteration number. The root-meansquare norm of δH is used, where δH is the head variation over tw...
View Full Document

This document was uploaded on 01/19/2014.

Ask a homework question - tutors are online