Questions tagged [hec-ras]

a standalone program for analysis and modeling of river hydrology, flow profiles, floodplain mapping, and sediment transport

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QGIS - creating cross section to meet contour line

How can I automate the process of creating a shapefile containing cross-sections of a river centreline that will meet to a set distance given by a contour shapefile? Is there a plugin or a set of ...
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71 views

Forcing left to right order of cross section lines of river using QGIS?

Based on "Generating a series of cross sections (profiles) along a line?" post, how can I force the cross-section lines to be created, thus collecting elevation data, from LEFT to RIGHT facing the ...
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What is the schema of HEC-RAS output in HDF5 format?

I realize that HDF5 is a self describing format, and I can use a tool or programmatically find out what types of data groups exist in an HDF5 file. What I am really looking for are the group and data ...
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Which geographic coordinate system should I use to work in meters in Angola?

I am using WGS84 in Qgis 2.18, but when I try to use some Qgis Plugins (like Profile Tool and Q-Ras) they don´t work. Is it a coordinate problem? Or something else? Profile Tool: It makes the ...
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302 views

How to elevate cross-sections in HEC-RAS 5.0.3?

Then creating the cross sections in HEC-RAS it appears that all of the cross sections are in the same elevation. I have tried to change each elevation then creating each cross section, but I get ...
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819 views

Unable to delineate inundation map from HEC-RAS to Hec-GeoRAS?

I am trying to delineate the flood map generated from HEC-RAS by importing them into the HEC-GeoRAS. However, I got this error: How will I resolve this?
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22 views

Editing DEM file

I'm currently working on a small town flood inundation mapping , the DEM file i am using for simulation contains a breakwater built after a recent flood event. My question is if it is possible to edit ...
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34 views

“Export Ras Data” on HEC-GeoRas doesn't work?

I use ArcGIS 10.2 and I installed HEC-GeoRAS 10.2 on it as well to define the geometric data as input to HEC-RAS. I go over all the steps, and my "Rivers" and "XSCutLines" attribute tables seem to be ...
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1answer
89 views

Assigning XS Cut Line Attributes like River/Reach Name, Stationing, Bank Lines, etc?

I'm working on a flood inundation project as my research study of my course. I am now assigning XS Cut Line Attribute (after constructing the XS Cut Lines) in HEC-Georas > RAS Geometry > XS Cut Lines ...
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1answer
255 views

Missing files in HEC-RAS 5.0.3

I'm trying to create the files in HEC-RAS 5.0.3, but nothing is created. Even though the location of the project is shown in the main window, I can't find the file in this location. That causes this ...
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3k views

Hec-Ras 5.0: Adding aerial imagery to geometric view

I'm having trouble displaying an aerial imager in the HEC-RAS geometric view in version 5.0.1. I've added the aerial, a project TIF file, to the RAS Mapper and it shows up without issue. When I go to ...