Introduction
Creating a river branch from a river polyline shapefile requires that you import a river geometry into MIKE+.
This includes the following steps:
#01 - Creating a river geometrical alignment from a polyline shapefile - see Fig. 1.
You need to import a shapefile containing the geometric distribution of the river path into MIKE+.
Fig. 1 - River branch geometrical arrangement
#02 - Extracting the river line in a shapefile format is readily available from multiple open data sources - see Fig. 2.
Bringing these files into MIKE+ in a quick fashion is desired. You need to create a MIKE+ model, including the River Network mode on.
Fig. 2 - Mode selection in MIKE+
#03 - Making sure that you have set up the proper projection system as the projection system defined for the shapefile.
In the Symbology Tab you can add the shapefile as an additional layer -see Fig. 3- to verify that the imported river is projected accordingly - see Fig. 4.
Fig. 3 - Additional Layers in MIKE+
Fig. 4 - Display of DEM and Shapefile in MIKE+ to check the river alignment
#04 - Populating the shapefile of the river into MIKE+ can be done through the Import/Export Tool - see Fig. 4.
In order to bring features from a shapefile into MIKE+ the information should be associated with the data fields in the MIKE+ tables.
- In the Source Mask field set up the shapefile location and the Target Mask would be the current MIKE+ database
- Insert Section, the source will be the shapefile name and the target would be mrm_Branch choose Append as the Transfer mode
- Hitting “Automap” will couple the geometry properties and the NAME of the feature layer (map it to MUID). The option “Automap” is a good start to match geometric features
- The import tool requires you to run “Verify” before being able to execute the tool. Click “Verify” and if everything is fine you will see the “OK” box in green on the lower right corner of the dialogue. In case of problems, you will see an “ERROR” message. Once you have an OK status it is possible to click “Run”
Fig. 4 - Importing a river shapefile in MIKE+ with the "Import and export" tool
#05 - Checking the alignment on the map - see Fig. 5.
Once the shapefile data has been imported it is time to check the correct alignment of the river on the map. Go to map zoom near the river branch and compare with the shapefile (added as a background layer).
Fig. 5 - River elements properly created in MIKE+
Conclusion
Creating a river branch from a polyline shapefile import workflow in MIKE+ is a seamless process and faster than manual digitization.
FURTHER INFORMATION & USEFUL LINKS
Manuals and User Guides
MIKE+ Documentation Index
MIKE+. River Network Modelling User Guide
Training options
MIKE+ River - Getting started with river modelling