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 create a shapefile containing the geometric distribution of the river path. This can be done using e.g. GIS software.
Fig. 1. - River branch geometrical arrangement
#02 - Creating a MIKE+ model.
You first need to create a MIKE+ model, ensuring that you have set up the proper projection system (same as the projection system defined for the shapefile) and that the ‘River network’ Feature checkbox is ticked - see Fig. 2.
Fig. 2. - ‘River network’ Feature selection in MIKE+
#03 - Adding the shapefile in MIKE+ as a layer.
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. This step is not compulsory but is recommended.
Fig. 3. - Adding layers in MIKE+
Fig. 4. - Display of DEM and Shapefile in MIKE+ to check the river alignment
#04 - Incorporating the shapefile of the river in the MIKE+ model through the “Import and export” Tool - see Fig. 5.
In order to bring features from a shapefile into MIKE+ the information should be associated with the data fields in the MIKE+ database 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. 5. - Importing a river shapefile in MIKE+ with the "Import and export" tool
#05 - Checking the alignment on the map - see Fig. 6.
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. 6. - Checking river elements are properly created in MIKE+
Conclusion
Creating a river branch from a polyline shapefile in MIKE+ involves a seamless import workflow process. The same process can be followed to import rivers as well as other types of features from other types of data sources (e.g. CAD).
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