AutoCAD Civil 3D

[#1]

I have a surface profile 1 and a corresponding water level profile 1 of a flood plain. Now I get an updated surface profile 2 and the engineer ask me to ajust the water level according to the difference of surface level 1 and 2. 

How can I add a irregular distance (water depth)  to surface profile 1?

[#2]

Not sure exactly what you're trying to do.  Does copying the surface help?  Then you can raise or lower the copy by the necessary amount and add that surface profile to the profile view.

[#3]

At each station the delta (suface profile 1 - surface profile 2) is different. I have to adjust the water level profile according to this delta

[#4]

Do you know SAC?

[#5]

so far I don not have a corridor. why should a make one?

[#6]

I can quickly kick out your required adjusted profie and floodplain delineation all in one shot. 

[#7]

I hope somebody else can help me?

[#8]

Oh ok if you don't have time to explore that,  you can just post the drawing with the profiles and I can do that for you real quick, no charge.

[#9]

Is your water level profile from a surface too?

If you do a volume surface between Surface1 & Surface2, this will give you the difference between them at every station.  You could then paste that volume surface into a regular surface, and do another volume surface between that and the water surface.  This will add the difference between the first two onto the water surface.  But you will have to figure out which one is Base and which one is Comparison in each case.

[#10]

So many good options out there...

Here's another one:

You can always output the profiles to XML and quickly get the data to crank on in Excel. Then bring it back with XML:

<Profile name="Main RD">
<ProfAlign name="Main-FGCL">
<PVI>0.507625059359 2506.</PVI>
<PVI>582.340948472239 2523.219164741822</PVI>
<PVI>1511.652753557886 2507.38066067943</PVI>
</ProfAlign>
</Profile>