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Unformatted text preview: on of lnK (degree of
heterogeneity). Thus, the output of a heterogeneous problem is used as initial condition for
simulating a “more heterogeneous” problem. This procedure adds an external loop to the flow
solver. Mass balance errors, in terms of net discharge rate normalized by global outflow rate, did not
exceed about 1%, for all simulations presented here.
5.2 Effect of heterogeneity level on mean salt wedge Fig. 2 and Fig. 3 display perspective views of simulated seawater intrusion for a highly variable
permeability (σlnK = ln10 ≈ 2.30). Two surfaces are displayed in each figure : ZSALT(x,y), the
salt/fresh interface level (mapped with color-coded logK values), and ZS(x,y), the freshwater
piezometric surface (or hydraulic head), also mapped with the same color-coded or grey-scale logK
On Fig. 2, one can clearly observe the sharp local gradients of the saltwater interface occuring in
low permeability zones, which act as barriers to seawater (it should be kept in mind, however, that
K(x,y) is the depth-averaged permeability).
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- Winter '14
- The Land, In French