Zoet-zout inversie, enkele modelresultaten Gualbert Oude Essink Unit Soil and Groundwater Systems Deltares, The Netherlands.

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Zoet-zout inversie, enkele modelresultaten Gualbert Oude Essink Unit Soil and Groundwater Systems Deltares, The Netherlands

Grid convergence Time step Salt water pocket in a fresh environment

Salt water pocket in a fresh environment (I) cases Effect of discretisation on a ‘salt lake problem’

Salt water pocket in a fresh environment (I) cases Effect of discretisation on a ‘salt lake problem’

Salt water pocket in a fresh environment (II) cases Effect of discretisation

Salt water pocket in a fresh environment (II) cases Effect of discretisation

Salt water pocket in a fresh environment (III) cases Effect of discretisation

Salt water pocket in a fresh environment (III) cases Effect of discretisation

Salt water pocket in a fresh environment (IV) cases Effect of discretisation

Salt water pocket in a fresh environment (IV) cases Effect of discretisation

Salt water pocket in a fresh environment (V) cases Effect of discretisation

Salt water pocket in a fresh environment (VI) cases Conclusion: For some physical processes, a large number of cells is necessary Check always grid convergence!

Sri Lanka Some days after December 26 th, 2004 Impact of the Tsunami on groundwater systems

Impression of relevant salinisation processes by conceptual models of salt water intrusion in coastal aquifers: 1. 1.Fingering processes in the subsoil 2. 2.Evolution of a freshwater lens after flooding by sea water 3. 3.Freshwater lens in a coastal aquifer with a brackish lagoon Next step: quantifying processes in real situations, using topographic and hydrogeological data, and ending up with vulnerability maps

Concept 1: Fingering processes in the subsoil Case Sri Lanka: lagoon setting fingering processes

Concept 1: Fingering processes in the subsoil

Concept 2: Evolution of a freshwater lens after flooding

Concept 3: Freshwater lens in a coastal aquifer with a brackish lagoon Case Sri Lanka: lagoon setting

Concept 3: Freshwater lens in a coastal aquifer with a brackish lagoon

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