Questions tagged [hec-ras]

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

1
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1answer
63 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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0answers
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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1answer
41 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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0answers
26 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 ...
5
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1answer
164 views

QGIS: Edit elevation in DTM to get correct slope of a river

I am new to QGIS and just need it to do a hydrolocic analysis of an area of which I later make a flow model with HEC-RAS 2D. I made it according to this tutorial: https://www.youtube.com/watch?v=Ro-...
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0answers
46 views

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 ...
0
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1answer
46 views

User-Scaled Color Relief Map to Google Earth from DTM

I have a DTM file, and my goal is to load it up onto Google Earth as a color relief map, with the colors gradient at levels I chose. I have successfully done this with RAS MAP using HEC RAS software, ...
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1answer
54 views

Shifting entire river channel in HEC-RAS?

This question is specific to the HEC-RAS software. I'm trying to use the software to shift a river channel. I've used the Geometric Data Editor for the Cross Sections to edit the positions of the ...
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0answers
79 views

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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1answer
247 views

Error creating Terrain in HEC-RAS

I am struggling to produce a terrian file with RAS Mapper. I have a .tif file produced from a .asc raster elevation and when I tried to add a New Terrain Model as described in the documentation I get ...
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2answers
814 views

Flood Inundation Mapping In HEC-RAS?

I'm getting this output as a result of discharge values while doing flood inundation mapping. In some areas there are breaks as indicated by red arrows. If this result is correct what would be the ...
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1answer
197 views

Hec Ras Error Message

I am getting this error when I am running unsteady flow analysis.I run geometric correction mesh calculation but still, the error is same.
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0answers
26 views

Can I determine hydraulic load on river bank with hec-ras? [closed]

I want to calculate the force exerted by wave action on river bank. If I know the discharge, flow rate and water level, can I calculate the hydraulic load acting on river bank with hec-ras? If not,...
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5answers
6k views

Is it possible to export cross sections from QGIS to HEC-RAS

Is it possible to create cross sections along a river in QGIS and then export the data to HEC-RAS?
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1answer
387 views

How to fix a broken plugin (it cannot import name NavigationToolbar2QTAgg)

I want to use the the pluging ProfileFromPoints but I am getting an error saying cannot import name NavigationToolbar2QTAgg. The solution seems to link with an old library name as mentioned here: ...
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1answer
611 views

Hec Ras error while processing

I am facing this error while creating a new terrain in Hec RAS ? Importing 1 of 1: dem_rep.tif Step 1 of 4: Translating to GeoTiff with SRS... Error creating Terrain: The system cannot find the file ...
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1answer
809 views

How to Batch Export HEC-RAS Results Layers

I've created a hydro model in HEC-RAS (ver 5.0.3) and have a separate flow profiles for every day of the year, using the 53-year median flow rate for that day, and under multiple structural scenarios ...
1
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1answer
158 views

HEC-RAS limitation on cross sections?

For every cross-section profile, Manning's value is assigned. There are numerous values in a single cross-section profile but HEC-RAS allows only 20 values per cross-section. How can I deal with ...
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0answers
80 views

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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1answer
60 views

SAR Flood Depth Mapping [closed]

Is it possible to map flood depth using sar dataset? if yes Which sar data should be used for better result and using which software we can map?
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2answers
2k views

Filling hole in DEM using ArcGIS Desktop?

How would I fix my DEM because it has holes? I need to maybe extrapolate from surrounding terrain. Here is the picture
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0answers
31 views

Representing channel characteristic data [closed]

I have stream channel cross profiles of a small stream, as well as water depth data from dive loggers we installed the beginning of summer. There is only one dive logger in the stream. I am trying to ...
0
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1answer
2k 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 ...
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1answer
227 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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0answers
285 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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2answers
1k views

Converting Easting, Northing, and Elevation to Station and Elevation

How can I convert x,y,z (easting, northing and elevation) data into station and elevation? I am trying to input the data into HEC-RAS, which only takes station and elevation.
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1answer
235 views

Exporting complete river profile from hec-ras into ArcMap?

Whenever i import the data from hec-ras the result is the same, what mistake am i making here?
3
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1answer
4k views

Can QGIS open a SDF file created by HEC RAS?

I used the "export GIS data" option in HEC RAS and got a SDF file. Is it possible to open it in QGIS?
1
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1answer
134 views

DEM ASCII for HEC-GeoRAS

I have a hard time understanding what ASCII files are. I have this DEM in asc. I try to import them into ArcMAP 10.3 and they appear in my naked eyes as images however what I found on internet is ...
0
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1answer
369 views

How to convert floodplain inundation results from a Hec-Ras model into Google Earth?

Having run a Hec-Ras 4.1.0 model, I wish to show the results in Google Earth. How is this possible and is it possible to do this by using ArcMap 10.1?
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0answers
788 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?
3
votes
2answers
259 views

Determining steady flow in HEC_RAS 4.0

While using HEC-RAS 4.0 Beta, how to set PF1 in Steady Data Flow?