GMS:Building an MT3DMS Simulation: Difference between revisions
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{{MT3DMS Links}} | |||
Setting up an MT3DMS simulation involves taking a pre-defined MODFLOW simulation and defining some additional properties such as porosity, assigning concentrations to [[GMS:MT3DMS_Point_Sources/Sinks_BC|sources and sinks]], and choosing some general simulation options. MODFLOW automatically generates a head and flow file (*.hff) containing information on computed heads and fluxes. This file is used as part of the input to the transport model when MT3DMS is launched. MT3DMS uses the top and bottom grid elevation specified in the [[GMS:Global Options/Basic Package|''Global Options/Basic Package'' dialog]]. A MODFLOW model must exist in the GMS project prior to creating an MT3DMS simulation. | Setting up an MT3DMS simulation involves taking a pre-defined MODFLOW simulation and defining some additional properties such as porosity, assigning concentrations to [[GMS:MT3DMS_Point_Sources/Sinks_BC|sources and sinks]], and choosing some general simulation options. MODFLOW automatically generates a head and flow file (*.hff) containing information on computed heads and fluxes. This file is used as part of the input to the transport model when MT3DMS is launched. MT3DMS uses the top and bottom grid elevation specified in the [[GMS:Global Options/Basic Package|''Global Options/Basic Package'' dialog]]. A MODFLOW model must exist in the GMS project prior to creating an MT3DMS simulation. | ||
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#Construct a [[GMS:MODFLOW Conceptual Model Approach|MODFLOW conceptual model]], [[GMS:3D Grid Module|create a grid]], and [[GMS:Map to MODFLOW|convert the conceptual model data]] to the MODFLOW data defined at the grid cells. | #Construct a [[GMS:MODFLOW Conceptual Model Approach|MODFLOW conceptual model]], [[GMS:3D Grid Module|create a grid]], and [[GMS:Map to MODFLOW|convert the conceptual model data]] to the MODFLOW data defined at the grid cells. | ||
#Run the MODFLOW simulation to save the MT3DMS head and flow file. | #Run the MODFLOW simulation to save the MT3DMS head and flow file. | ||
#Return to the [[GMS:Map Module|Map module]]. Edit the properties of the | #Return to the [[GMS:Map Module|Map module]]. Edit the properties of the conceptual model to include transport. Assign concentrations to the sources/sinks in the conceptual model where necessary. Also define [[GMS:Coverages|polygonal zones]] describing layer data including porosity, longitudinal dispersivity, sorption constants, rate constants, and bulk density. | ||
#Select the ''Feature Objects'' | '''Map → MT3DMS''' command to automatically assign the MT3DMS data to the appropriate cells in the grid. | #Select the ''Feature Objects'' | '''Map → MT3DMS''' command to automatically assign the MT3DMS data to the appropriate cells in the grid. | ||