I need to adjust the elevation with the ground survey elevation. Please give me any recommendation how to adjust such elevation and extract the basic characterstics the flow depth and elevation..
Answer by
Pooja Bajaj
To adjust the elevation with the ground survey elevation in HEC-RAS, you can import the ground survey data into the software and use it to modify the elevation values. This can be done by creating a new elevation grid or by editing the existing grid. Once the elevation is adjusted, you can extract the basic characteristics such as flow depth and elevation from the model results.
The Hecras user manual states gridded Precipitation and Evapotranspiration can be input, however Version 6.3.1 only has point or constant Evapotranspiration options available. When will gridded Evapotranspiration input be available?
A
Answer by
Akash Shah
Gridded Evapotranspiration input is not yet available in Hecras Version 6.3.1, however it may be available in future versions.
I have a question about working with HEC-RAS. I am currently creating a river system with corresponding cross sections. I also have the GPS coordinates [Excel] of the respective cross sections. How is it possible for me to integrate these next to the elevation data in the cross profile, so that each cross profile is printed at the direction location? Because currently I can enter the cross profiles, but only the 1st (start of river tube) is displayed. My data should actually be georeferenced.
In addition, I wanted to ask whether it is possible to read in only the GPS data (North-East) including the elevation profile. Is there an automated interpolation for the water profile? Or does that work?
There is a PDF file with instructions related to the Flow Area and the way it should be used. The file is more like an user guide. It provides various information about the procedure available in this application. I recommend you download the PDF to find out more. There is also a part titled Ineffective Flow Area on page 38.
When I uploaded my information from AutoCAD Civil 3D, I needed to switch my coordinates. This is having a great effect on my culverts, they show the incorrect stationing for the upstream and downstream x-sections.
Per autodesk.com: To Reverse the flow direction in Hec Ras, go to the Geometric Data editor> GIS Tools> Search Invert Lines Table > and Flip Coord. Order.
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Answer by
Robert Polubinski
This is a problem that needs to be elaborated in detail, because the modeling process requires expert knowledge from the ones who work in the field of culvert modeling. However, the best way to get information about culverts and modeling is with the help of the available documents found on the websites listed through Google Search. Access the page and then use the available PDF files to get an overview about this problem and how can it be fixed.
I am trying to insert Manning coefficients in Geometry but two out of the three columns in the table are grey and I am unable to import them. Any idea how to fix it?
Answer by
Pooja Bajaj
To fix this issue in HEC-RAS, ensure that you have the appropriate permissions to modify Manning coefficients in the Geometry table. Try running HEC-RAS with administrative privileges, or contact your system administrator for assistance.
I need to adjust the elevation with the ground survey elevation. Please give me any recommendation how to adjust such elevation and extract the basic characterstics the flow depth and elevation..
To adjust the elevation with the ground survey elevation in HEC-RAS, you can import the ground survey data into the software and use it to modify the elevation values. This can be done by creating a new elevation grid or by editing the existing grid. Once the elevation is adjusted, you can extract the basic characteristics such as flow depth and elevation from the model results.
The Hecras user manual states gridded Precipitation and Evapotranspiration can be input, however Version 6.3.1 only has point or constant Evapotranspiration options available. When will gridded Evapotranspiration input be available?
Gridded Evapotranspiration input is not yet available in Hecras Version 6.3.1, however it may be available in future versions.
I have a question about working with HEC-RAS. I am currently creating a river system with corresponding cross sections. I also have the GPS coordinates [Excel] of the respective cross sections. How is it possible for me to integrate these next to the elevation data in the cross profile, so that each cross profile is printed at the direction location?
Because currently I can enter the cross profiles, but only the 1st (start of river tube) is displayed. My data should actually be georeferenced.
In addition, I wanted to ask whether it is possible to read in only the GPS data (North-East) including the elevation profile. Is there an automated interpolation for the water profile? Or does that work?
There is a PDF file with instructions related to the Flow Area and the way it should be used. The file is more like an user guide. It provides various information about the procedure available in this application. I recommend you download the PDF to find out more. There is also a part titled Ineffective Flow Area on page 38.
PDF file: http://www.hec.usace.army.mil/software/hec-ras/documentation/HEC-RAS_4.1_Applications_Guide.pdf
When I uploaded my information from AutoCAD Civil 3D, I needed to switch my coordinates. This is having a great effect on my culverts, they show the incorrect stationing for the upstream and downstream x-sections.
Per autodesk.com:
To Reverse the flow direction in Hec Ras, go to the Geometric Data editor> GIS Tools> Search Invert Lines Table > and Flip Coord. Order.
This is a problem that needs to be elaborated in detail, because the modeling process requires expert knowledge from the ones who work in the field of culvert modeling. However, the best way to get information about culverts and modeling is with the help of the available documents found on the websites listed through Google Search. Access the page and then use the available PDF files to get an overview about this problem and how can it be fixed.
I am trying to insert Manning coefficients in Geometry but two out of the three columns in the table are grey and I am unable to import them. Any idea how to fix it?
To fix this issue in HEC-RAS, ensure that you have the appropriate permissions to modify Manning coefficients in the Geometry table. Try running HEC-RAS with administrative privileges, or contact your system administrator for assistance.
The HEC-RAS program uses equations to measure scouring and flow profile.