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Heterogeneous model property values are supported by Visual MODFLOW using either Constant Value Property Zones, or Distributed Value Property Zones. However, in most situations, the flow and transport properties will not be uniform throughout the entire model domain, and it will be necessary to assign different property values to different areas of the model. This will ensure the model has the minimum data required to run a simulation. Upon creating a Visual MODFLOW project, the default flow and transport parameter values are assigned to every grid cell in the model domain. Similarly, a transport model requires transport parameter values for each active grid cell in order to run a transport simulation. The active Properties screen will always be displayed in the Current Overlay field on the side menu bar.Ī flow model requires Conductivity, Storage, and Initial Heads property values for each active grid cell in order to run a flow simulation. These model properties, and their associated sets of parameters, are assigned using different input screens for each property. Conductivity requires values for K x, K y, and K z). Note: If no transport variant has been selected, the Transport Properties options will be disabled.Īs noted in the list above, some of these model properties require data for several different parameters (e.g. Note: The Vadose Zone menu item will be available only if MODFLOW-SURFACT is the selected flow engine. In Visual MODFLOW, the hydrogeological and hydrogeochemical characteristics of the model are classified into the following input properties: A groundwater flow and contaminant transport model requires many different types of data to simulate the hydrogeological and hydrogeochemical processes influencing the flow of groundwater and migration of dissolved contaminants.