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Each time a HecRas river segment is read, the importing routine will first create an xp node at the start and end point of the river polyline that describes the segment. However, in xp nodes are essential for modeling.
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The concept of nodes does not exist in HEC-RAS. Procedure for creating objects based on HEC-RAS geometry The user can elect to untick cross section in which case those cross sections then will not be written to the global database or used for the link cross section assignment when the ‘All Network’ option is used. If such a node is found, no new node is created and the existing node is used for connection of the links in the exported model.ĭescription/Shape: This table gives an overview on all Cross Sections that are to be imported before the final import is acknowledged by pushing the ‘Ok’ button. Before a new node is created it is checked whether there is already an existing node in the network whose distance to the node to be created would be less than the node merging distance. Node Merging Distance: This value is only used if a geometry file is imported using the ‘All Network’ option onto a non-empty xp-swmm network. Wherever a description is too long it is trimmed and a suffix #(enumeration) is added. Note that the HecRas description names for the cross sections are used for the natural section global database entries in xp-swmm. The’ Cross Section’ option will only populate the Natural Section Shapes records within the Global Database. All files *.g0* will be shown for selection.Īll Network/Crosssection only: The ‘All Network’ option will import the whole model by creating xp nodes and links, assigning the cross sections to the link and determining elevations for the nodes. The Cross Section only option allows the importing of only the cross sections from the given HEC-RAS geometry file.ĭescriptions of the various dialog options are listed below:įile Name: Select the HecRas geometry file that you want to import. This comprehensive HEC-RAS model importer provides users the ability to import the cross sections, reach layout, vertical reach data and downstream boundary conditions automatically from a HEC-RAS geometry file (*.g0*) by selecing the All Network option.