Geometric Data
The requisite geometric data includes stream centerlines and
cross section cut lines and these are prepared using the HECGeoRAS
user interface. It is a set of procedures, tools, and
utilities for processing geospatial data in ArcGIS. It also allows
the import of the prepared data into HEC-RAS model. The
creation of the import file requires a digital terrain model
(DTM) of the river system. Having imported the data into the
HEC-RAS system, the cross section data were adjusted to suit
the available bathymetric profiles.