HEC-RAS to TUFLOW

Introduction

This page contains a brief introduction to the methods of converting HEC-RAS model inputs into a format which compatible with TUFLOW. If you have any suggestions to be included in these pages, please email support@tuflow.com.

Model Geometry Conversion (SDF_to_GIS.exe)

The SDF_to_GIS.exe utility converts HEC-RAS geometric data data into TUFLOW compatible GIS and csv input format. The utility outputs include:

1. Centerline location data in GIS format
2. Cross-section locations in GIS format
3. Cross-section data in csv format

The GIS format type can be either *mif or *shp. Options are also available to automatically trim the processed cross-section GIS and csv data to the main channel region between defined levee markers. The HEC-RAS model inputs need to be in SDF format (HEC-RAS export format), and must be geo-referenced using a real world projection.

Example Utility Syntax (SDF_to_GIS.exe)

The utility requires GIS projection information to correctly translate the spatial dataset from SDF format to *mif or *.shp format. This is done by including either a projection or header file in the same folder directory as the SDF file. The utility will use the projection information from this file for the data conversion.

1. mif output: Projection.mif or Header.mif
2. shp output: Projection.prf or Header.prj

To output to a points file specify either a MapInfo output with the "-mif" switch or Arc shapefiles output with the "-shp" output. To output at cell corners only:

• Convert maximums to a MapInfo Points file at cell corners:
  

TUFLOW_to_GIS.exe -mif -b -max M01_5m_003_h.dat

Description: Convert to a MapInfo format ("-mif"), using batch mode ("-b"), converting the maximums ("-max") for the water level results M01_5m_003_h.dat.

• Convert HEC-RAS sdf data to mif format, trimming cross-section at levee markers :
  

sdf_to_gis.exe -mif hecras_example.sdf

• Convert HEC-RAS sdf data to shp format, trimming cross-section at levee markers :
  

sdf_to_gis.exe -shp hecras_example.sdf

• Convert HEC-RAS sdf data to mif format, not trimming cross-section at levee markers :
  

sdf_to_gis.exe -mif -notrim hecras_example.sdf

• Convert HEC-RAS sdf data to shp format, not trimming cross-section at levee markers :
  

sdf_to_gis.exe -shp -notrim hecras_example.sdf