Written by Christopher Goodell, P.E., D.WRE | WEST Consultants Copyright © The RAS Solution 2016. All rights reserved. Back in September 2015, I wrote an article on how to extractflow data from a transect in a 2D area. This was a round-about way of getting flow flux data out of RAS Mapper. Back then the beta version of HEC-RAS 5.0 was somewhat limited in the ways data could be extracted from a 2D area. In the final release of Version5.0, you may have noticed in the bottom left-hand corner of RASMapper, there is a very unassuming tab called “Profiles Lines”. Profile Lines are another way of extracting linear data from a 2D area, only these are extracted longitudinally, like a profile plot. Here’s how it works: 1. Run your project and then open up RAS Mapper. Activate your results by checking either the Depth, Velocity, or WSE output layer. Turning on the particle tracing might help guide where you place your profile line. 2. Select the Profile Lines tab. Click the “+” button to draw a new profile line on your 2D area. Double click to end the line and when prompted, give it a name. Here I’ve named it “Profile 1” and it is stored in the Profile Lines bin. 3. Now select the pointer from the toolbar at the top and then right-click anywhere on your profile line. Whatever results layers you have checked in the layer manager will be available as profile plots. 4. Click on whichever value you would like to see for the profile plot. Here we can the see water surface elevation profile. Notice that the terrain is included on this plot for reference. And the velocity profile: And the depth profile:
