Thursday, August 28, 2014

Sediment Transport Modeling Webinar

For all you sediment transport enthusiasts,  Marty Teal is giving this webinar in October.  I highly recommend it.  He has a wealth of experience in sediment transport modeling and is an excellent instructor.  Go sign up if you want to learn more about sediment transport modeling in HEC-RAS!
-Chris G.

ASCE Continuing Education and ASCE's Environmental and Water
Resources Institute (EWRI) Present
An Introduction to Sediment Transport Modeling Using HEC-RAS
A Live ASCE Webinar

Date: Wednesday, October 8, 2014    
Time: 12:00 p.m. - 1:00 p.m. ET         
Live Webinar Summer Special for ASCE Members
Individual Members receive the special reduced rate of $99 for any live webinars taking place through December 31, 2014.  Register by September 30 to lock in the special rate.
Reminder: Registration for this webinar ends on October 3rd
Pay a single site registration fee and an unlimited number of people in your organization can attend at that site.

Register Early as Space is Limited!  Questions? Call 1-800-548-2723.
Webinar Content

Tuesday, August 19, 2014

Vertical Walls-What are the Implications?

Written by Christopher Goodell, P.E., D.WRE  |  WEST Consultants Copyright © The RAS Solution 2014.  All rights reserved.

Many water surface profile software programs prior to HEC-RAS had a quirky rule against having perfect vertical sides.  In other words, you could not have two or more elevations at the same stationing.  A perfect example of this is a rectangular flume.  The workaround for the older software was to define the tops of the flume to be 0.01 ft or meters just outside of the bottom edge of the flume, like this:
In HEC-RAS, you don’t need to do this.  In fact, you shouldn’t do this as you’ll get the wrong answer.  Let me explain why...

Tuesday, August 5, 2014

Tuesday Tip of the Week–Column Header Select

Written by Christopher Goodell, P.E., D.WRE  |  WEST Consultants Copyright © The RAS Solution 2014.  All rights reserved.

Here’s a nice feature in HEC-RAS input tables that will save you a little bit of time.  Let’s say you want to highlight an entire column of data.  Maybe you want to delete all of the values in that column or paste in a block of data.  Or perhaps you want to highlight all of the cells so that you can perform an operation (multiply by a factor, add a constant, etc.) to all the values in the column.  Instead of clicking and dragging from top to bottom in the column (this could take a long time if you have a lot of entries), click the column header.  This will highlight the entire column instantly, allowing you to quickly perform the desired task.  This feature is particularly useful when working in boundary condition hydrographs, or geometry tables, like Manning’s n values.


Monday, August 4, 2014

Exploring HEC-RAS: XS Interpolation Within a Reach-Part 2

Written by Christopher Goodell, P.E., D.WRE  |  WEST Consultants Copyright © The RAS Solution 2014.  All rights reserved.

The last post on XS interpolation gave an overview for reasons cross section interpolation may be necessary and a detailed description of Interpolation Option A:  “Within a Reach”.
This post will cover Option B:  “Between 2 XS’s”.  Between 2 XS’s simply means HEC-RAS will interpolate cross sections ONLY between two selected “non-interpolated” cross sections.  It will not interpolate over a reach.  Obviously the disadvantage here is that you have to interpolate between pairs of cross sections one-at-a-time, which could prove to be  a long exercise for a large model.  However, Option B has a huge advantage over Option A, in that you are able to control how interpolation is done, by drawing your own connecting Master Chords.  More on that in a bit.  First, to initiate interpolation with Option B, go to the Geometric Data window and select Tools…XS Interpolation…Between 2 XS’s…

When Option B is selected, the following window will open: