Test af Analytiske Element Modeller - Grundvandskortlægning

Indholdsfortegnelse
1 BAGGRUND ............................................................................................................................5
2 AEM MODELLER ....................................................................................................................6
2.1 INDLEDNING .........................................................................................................................6
2.2 BRUGEN AF ANALYTISKE MODELLER ......................................................................................7
2.2.1 Anvendelsen af analytiske metoder i Danmark ............................................................7
2.2.2 Historisk brug af AEM modeller....................................................................................7
2.2.3 Andre applikationsområder med AEM modeller .........................................................10
2.2.4 Sammenligning af AEM og finite difference modeller.................................................11
2.3 VALG AF VÆRKTØJ .............................................................................................................12
2.3.1 Nogle tommelfingerregler for brugen af AEM modeller. .............................................13
2.3.2 AEM Ressourcer ........................................................................................................14
2.4 EKSEMPEL PÅ OPSTILLING AF EN SIMPEL AEM MODEL. .........................................................15
2.4.1 Modelopstilling ...........................................................................................................16
2.4.2 Modelkalibrering.........................................................................................................17
3 KOMPARATIV ANALYSE AF OPLANDE BEREGNET MED MODFLOW, AEM OG DEN
ANALYTISKE HÅNDTEGNINGSMETODE .................................................................................18
3.1 METODE ............................................................................................................................19
3.1.1 Scenarietyper .............................................................................................................19
3.1.2 Arbejdsgang ...............................................................................................................19
3.1.3 Modelopstillinger ........................................................................................................20
3.2 MODEL A - HEDESLETTEN...................................................................................................22
3.2.2 Modflow model ...........................................................................................................23
3.2.3 Håndtegnede oplande................................................................................................24
3.2.4 AEM model.................................................................................................................25
3.2.5 Resultater...................................................................................................................28
3.2.6 Sammenfatning på oplande fra hedesletten...............................................................31
• MODEL B - BEGRAVET DAL.....................................................................................................32
3.2.7 Data ...........................................................................................................................32
3.2.8 MODFLOW model......................................................................................................33
3.2.9 Håndtegnede oplande................................................................................................35
3.2.10 AEM model..............................................................................................................35
3.2.11 Modelkalibrering......................................................................................................36
3.2.12 Resultater................................................................................................................37
3.2.13 Sammenfatning på oplande fra den begravede dal.................................................41
3.3 MODEL C - RANDZONE GEOLOGI .........................................................................................42
3.3.1 Opstilling ....................................................................................................................42
3.3.2 Modflow model ...........................................................................................................42
3.3.3 Håndtegnede oplande................................................................................................44
3.3.4 AEM model.................................................................................................................44
3.3.5 Resultater...................................................................................................................47
3.3.6 Sammenfatning på oplande fra ø med rodet geologi .................................................49
3.4 MODEL D – KALKMAGASIN ..................................................................................................50
3.4.1 Data ...........................................................................................................................50
3.4.2 Modflow model ...........................................................................................................51
G E U S
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