7.3. QGEP-SWMM workflow
SWMM Create Input. It reads data from the QGEP views (schema
qgep_swmm) and generate an input file for SWMM.
.inpfile. Its likely that the
.inpfile generated in the previous step contains errors or needs some parameters to be tuned. We recommand to first open the
.inpfile with the SWMM Graphical User Interface (GUI) to solve the errors. Similarly, if you need to tune the simulation parameters, you have to edit the
.inpfile with SWMM GUI.
SWMM Execute, it launches SWMM. Run it on a tested
.inpfile. It generates a report file
.rptwhich contains the summary and the full time series. Errors can also occur during the running time.
Stores and map the results
If you dont want to store the result in QGEP database: Run
SWMM Extract Results. It parses the report file and generates three QGIS table layers from the summary. The user has to join the computed values with the geometries and map them.
If you want to store the results in QGEP and use the dedicated view for the mapping: .Run
SWMM Import Results. It parses the report file. The results are imported in the measurements table, they populate a view dedicated for the mapping.
Each step is explained in more details in the next chapters.
7.3.2. GEP project
WORK IN PROGRESS: This section must be completed with end users
Usually, a GEP analysis has at least three steps:
The current state of the network is analysed
The planned state is analysed.
Several variants are tested and analysed
Minimal parameters to be set
Time series: Create a time serie for the rain. The time series have to be linked to the raingages
Hydrology > Rain Gages (which are linked to the subcatchments)
Hydrology > Subcatchment: Set percent of of impervious area and infiltration parameters
Climatology > Evaporation
Run planned state simulation
In the function
SWMM Create Inputchoose the state planned. It extract the planned wastewater structures.
Run variants (network is modified)
New links and new nodes are created directly in SWMM GUI