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--- geoscene3d:hydro_calculations:feeflow [2025/04/28 08:25] – old revision restored (2024/01/22 14:25) kfu_i-gis.dk
+++ geoscene3d:hydro_calculations:feeflow [2025/12/18 15:08] (current) – [Step 1: Prepare the Layer Model in GeoScene3D] dev
@@ Line 1: / Line 1: @@
 ====== FEFLOW ======
-GeoScene3D provides a featuree to export the surfaces from a layer model to a file, that can be imported into FEFLOW
+===== Exporting a GeoScene3D Layer Model to FEFLOW =====
+ <font inherit/inherit;;#4e5f70;;inherit>FEFLOW is a finite-element based groundwater modeling software used to simulate subsurface flow and transport processes using geological layer models as a geometric framework. GeoScene3D can provide these geological layer models.</font>
+//This workflow describes how to export a geological layer model from **GeoScene3D** and prepare it for use in **FEFLOW**.//
+==== Requirements ====
+  * GeoScene3D **Layer Model**  (.grd)
+  * FEFLOW **Supermesh coordinate file**  (.dat)
+----
+==== Step 1: Prepare the Layer Model in GeoScene3D ====
+Open the Layer Model in GeoScene3D {{:geoscene3d:hydro_calculations:gs3d_fefow_start_layer_model.png?600}}//(For info on how to create a Layer Model see: [[https://wiki.geoscene3d.com/geoscene3d:building_a_layered_model|Building a layered model]])//
+//Ensure that://
+   * //All relevant layer surfaces are present//
+  * //The model geometry is complete and consistent//—-
+----
+==== Step 2: Prepare the Supermesh in FEFLOW ====
+  - Open your FEFLOW model \\ {{:geoscene3d:hydro_calculations:feflow_supermesh.png?400}}
+  - Create a **Supermesh**  covering the model area
+  - Export the **mesh node coordinates**  to an ASCII file (.dat) \\ {{:geoscene3d:hydro_calculations:feflow_ascii.png?600}}
+This file contains the **x–y coordinates**  of the mesh nodes and will later be enriched with elevation (z) values from GeoScene3D.
+----
+==== Step 3: Merge Layer Model with FEFLOW mesh (GeoScene3D → FEFLOW) ====
+  - In GeoScene3D, go to Hydro… \\ {{:geoscene3d:hydro_calculations:hydro.png?nolink&  }} \\  \\  \\ and choose Export Layer Model to FEFLOW… \\ {{:geoscene3d:hydro_calculations:hydro_export_layer_model_to_feflow.png?400}}
+  - The export wizard opens – click ''Next >''  on the **welcome **page
+  - Select the mesh coordinate file (.dat) exported from FEFLOW \\ {{:geoscene3d:hydro_calculations:mesh_coordinates.png?400}}
+  - Choose the surfaces from the **Layer Model**  to be sampled \\ {{:geoscene3d:hydro_calculations:feflow_export_layermodel.png?400}}
+  - Export the file and finish the wizard \\ {{:geoscene3d:hydro_calculations:feflow_export_finish.png?400}}
+The exported file now contains **z-coordinates sampled from the GeoScene3D layer model**, linked to the original FEFLOW mesh nodes.
+----
+==== Step 4: Import into FEFLOW ====
+  - Import the updated .dat file into FEFLOW \\ {{:geoscene3d:hydro_calculations:new_mesh.png?600}}
+  - The mesh nodes are now assigned elevations based on the GeoScene3D layer model \\ {{:geoscene3d:hydro_calculations:feflow_import.png?500}}
+==== Result: ====
+The geological surfaces from the GeoScene3D layer model are now incorporated to the FEFLOW model geo-metry. This enables groundwater flow and transport simulations in FEFLOW based on the geological model created in GeoScene3D.

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