HEC-RAS to TUFLOW: Difference between revisions
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= Boundary Condition Conversion =
The 2022 TUFLOW Release introduced support for time-series data from HEC-DSS files within a TUFLOW boundary condition database.
HEC-DSS is a database system for time series, curve, gridded data and more developed by the U.S. Army Corps of Engineers Hydrologic Engineering Center (HEC). See their website at https://www.hec.usace.army.mil/software/hec-dss/ for more information. The format is used for HEC developed software for data input and output. Rather than convert HEC-DSS time-series curves for use in TUFLOW, DSS data used by a HEC-RAS model can now also be used directly in TUFLOW.
HEC-DSS files organise data into paths with six parts (Part A – Part F) that resemble how files are organised on disk. The image below shows an example DSS file with a single path, with the curve plotted below.
To use a HEC-DSS time-series curve within a TUFLOW boundary condition database:
5. Provide the filename in the “Source” column.
6. Leave “Column 1”, which is used for time, blank (DSS files store the time with the curve values).
7. Identify the pathname in “Column 2.” Event placeholders such as __event__ can be used as part of the pathname. Wilcards (*) can be used for parts of the path, however, ensure the wildcards will not select more than one path within the file.
8. The “Add” and “Mult” columns can be used to offset or scale the time-series values, the same as non-DSS time-series curves.
The image below shows how the time-series curve above could be included in a boundary condition database. A wildcard is used for Part D of the pathname (date range). Note that the pathname must start with a forward slash (/).
By default, TUFLOW uses the first point in the time-series curve as TUFLOW time-zero. This can be changed using the new command “HEC-DSS Start Date” to identify the date/time that should be used for time-zero. The date should be in the isodate format: yyyy-mm-dd hh:mm:ss, where the time portions are optional.
HEC-DSS Start Date == 2022-01-01
Note: Non-time series data such as gridded data from a HEC-DSS file is not supported at this time. Contact support@tuflow.com to request other features that would be beneficial to your workflows.
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