[ckatsoulas]

You can add a new small 2d area adjacent to the main 2D area for the outlet to the culvert. Modify the terrain of the 2nd 2d area so it is below the culvert outlet and add boundary condition to it. You can then connect the culvert from the main 2d area to the 2nd 2d area. Be careful how you locate the 2nd 2d area as you cant place it adjacent to a boundary condition face of the main 2d area. I have tested this and it works great.

[ckatsoulas]

I may be stating the obvious, but did you scroll through the profile tab. If you looked at time zero then the culvert flow would likely be zero. You need to scroll through the profile tab to reach the peak flow time where the culverts will register flow.

[ckatsoulas]

Go to the main HECRAS window and select ‘view’, ‘Detailed output tables’. This will bring up a new window where you can select the required culvert and it will provide flow information for that culvert.

[ckatsoulas]

Access violation, usually means you may have a run results layer open in another software such as a GIS program and when you re-run the scenario HECRAS can’t overwrite the results. You need to close the GIS program before running HECRAS.

[ckatsoulas]

You have drawn the profile line from right to left in the direction of flow. you need to draw the profile line from left to right looking downstream.

[ckatsoulas]

Just press it and see what happens…. sometimes you need to take risks and suffer a little to learn… the suffering makes sure the learning is embedded in the brain for life…

[ckatsoulas]

There is an option in RAS mapper you can try.
Go to Tools>Options>Render Mode and try setting the Plot Tolerance to a number less than 0.001 which is the default.

[ckatsoulas]

Just press it and see what happens…. sometimes you need to take risks and suffer a little to learn… the suffering makes sure the learning is embedded in the brain for life…

[ckatsoulas]

Sorry I should have added, has anyone had this problem before and can someone shed some light as to how I could fix this issue without the use of a 1D channel.

[ckatsoulas]

Zoran, Have a look at Krey’s post on terrain modification below, it provides some very helpful methods for doing what you are asking

[ckatsoulas]

The ‘permission denied’ note says to me that the E: drive is write protected or you don’t have administrator rights to use that drive. Or you could be trying to overwrite an existing open file.

[ckatsoulas]

your simulation time is too short. You’re not giving HECRAS enough time to route the flow through the terrain. Extend the simulation time until the flow reaches the outlet and empties.

[ckatsoulas]

You have created a polygon that has at least two points/vertices sitting on top of each other on the same co-ordinate. You may have accidentally clicked twice when creating the polygon for the 2D area. You need to edit the polygon and delete the duplicate point.

[ckatsoulas]

have a look at Chris Goodell’s comments in the post below

http://hecrasmodel.blogspot.com/2013/10/stabilizing-dynamic-unsteady-hec-ras.html

[ckatsoulas]

to run a steady model in 2D you just need to change your hydrograph to have a constant flow for a long period.

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