HEC-RAS to TUFLOW: Difference between revisions

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. <br>

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.<br>

To use a HEC-DSS time-series curve within a TUFLOW model save a copy of the HEC-DSS input file to the TUFLOW bc_dbase folder and enter the following information into a TUFLOW boundary condition database:

5. Provide<li> Enter the filenameTUFLOW boundary condition location ID in the “Source”"Name" column.

6. <li> Leave “Column 1”, which is used for time, blank (DSS files store the time with the curve values).

7. <li> 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. <li> The “Add” and “Mult” columns can be used to offset or scale the time-series values, the same as non-DSS time-series curves.

By default, TUFLOW uses the first point in the time-series curve as TUFLOW time-zero. This can be changed using the newTCF 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.<br>

HEC-DSS Start Date == 2022-01-01<br>