update gwt/gwe tex

wpbonelli · Jan 20, 2025 · 471dc23 · 471dc23
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diff --git a/doc/mf6io/gwe/fmi.tex b/doc/mf6io/gwe/fmi.tex
@@ -1,6 +1,6 @@
-Flow Model Interface (FMI) Package information is read from the file that is specified by ``FMI6'' as the file type.  The FMI Package is optional, but if provided, only one FMI Package can be specified for a GWE model.
+Flow Model Interface (FMI) Package information is read from the file that is specified by ``FMI6'' as the file type.  The FMI Package file is required only if the GWE Model is running in a separate simulation from a previously run GWF Model. If the GWE Model is coupled to a GWF Model by an exchange, the FMI Package file is not required. Only one FMI Package can be specified for a GWE model.
 
-For most simulations, the GWE Model needs groundwater flows for every cell in the model grid, for all boundary conditions, and for other terms, such as the flow of water in or out of storage.  The FMI Package is the interface between the GWE Model and simulated groundwater flows provided by a corresponding GWF Model that is running concurrently within the simulation or from binary budget files that were created from a previous GWF model run.  The following are several different FMI simulation cases:
+The GWE Model needs groundwater flows for model grid cells, for boundary conditions, and for other terms, such as the flow of water in or out of storage.  The FMI Package is the interface between the GWE Model and simulated groundwater flows provided by a corresponding GWF Model that is running concurrently within the simulation or from binary budget files that were created from a previous GWF model run.  The following are several different FMI simulation cases:
 
 \begin{itemize}
 

diff --git a/doc/mf6io/gwt/fmi.tex b/doc/mf6io/gwt/fmi.tex
@@ -1,6 +1,6 @@
-Flow Model Interface (FMI) Package information is read from the file that is specified by ``FMI6'' as the file type.  The FMI Package is optional, but if provided, only one FMI Package can be specified for a GWT model.
+Flow Model Interface (FMI) Package information is read from the file that is specified by ``FMI6'' as the file type. The FMI Package file is required only if the GWT Model is running in a separate simulation from a previously run GWF Model. If the GWT Model is coupled to a GWF Model by an exchange, the FMI Package file is not required. Only one FMI Package can be specified for a GWT model.
 
-For most simulations, the GWT Model needs groundwater flows for every cell in the model grid, for all boundary conditions, and for other terms, such as the flow of water in or out of storage.  The FMI Package is the interface between the GWT Model and simulated groundwater flows provided by a corresponding GWF Model that is running concurrently within the simulation or from binary budget files that were created from a previous GWF model run.  The following are several different FMI simulation cases:
+The GWT Model needs groundwater flows for model grid cells, for boundary conditions, and for other terms, such as the flow of water in or out of storage.  The FMI Package is the interface between the GWT Model and simulated groundwater flows provided by a corresponding GWF Model that is running concurrently within the simulation or from binary budget files that were created from a previous GWF model run.  The following are several different FMI simulation cases:
 
 \begin{itemize}