Modeling Topo Changes

Chris,

I am working on a project that proposes constructing soccer fields in an existing floodplain area. This will obviously require changing the grades in this area. I am working from an existing HEC-2 file which I have topo linked sections in the study area and added more sections between. When I go to the proposed grading condition, I will have a different set of contours. Is there a way to get RiverCad to re-pull the elevations based on the new topo for the already run sections? Or will I need to start with a clean CAD file, link the existing HEC-2 sections and use the screen 3D map command to re-cut the sections that are changed?

Thanks
Stu Henry
BWSC

Dear Stu :

Note that RiverCAD / RMS can easily recut the cross-sections with the new topographic data. First, make certain that you have defined the new topo data as the elevation source data (Modules | Configure | Elevation Data). Then, select the cross-section that you want to recut the ground geometry for. Finally, select Input | Ground Geometry | Recut Topo. RiverCAD / RMS will then recut the topo map.

If you have any additional questions or need any further information, please contact me again.

Sincerely,

Chris E. Maeder, M.S.
Senior Technical Engineer
chris.maeder@bossintl.com

Thanks! The recut works as advertised.

Another question, I need to compare the results from two runs that have the same stationing, flow, etc. but are based on differing topography i.e. proposed grading vs. existing. I can't figure out a way to see both sets of results on the same profiles & sections. I can recut and save to a different reach, but I can't get them superimposed.

Thanks

Stu

Dear Stu :

Note that you would have to do a little CAD manipulation to overlap the 2 sets of cross- sections and profile plots. You would need to use the MOVE command to move one of the cross-section grids on top of the others.

HOWEVER, when you move any of our entity data (i.e., cross-section grids, etc.), you end up destroying our link to the entity. Therefore, I STRONGLY recommend creating a copy of the drawing file before manipulating the data. That way, our RMS / RiverCAD application can still manipulate the data with the backup drawing file.

If you have any additional questions or need any further information, please contact me again.

Sincerely,

Chris E. Maeder, M.S.
Senior Technical Engineer
chris.maeder@bossintl.com