Let’s say you have a digital terrain model of the area you want to model with 2D HEC-RAS. ONLY 2D RAS. In other words, you want to lay out a grid, but do not want to have do to any 1D computations-all 2D. The problem is the area you want to model includes one or […]
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”. http://hecrasmodel.blogspot.com/2014/05/exploring-hec-ras-xs-interpolation.html 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. […]
I’m starting a new series called “Exploring HEC-RAS”. Each post will discuss a feature in the menu items, starting with the Tools menu item in the Geometry Schematic. Today’s topic is “XS Interpolation Within a Reach”. There are two options for interpolating cross sections in HEC-RAS: “Within a Reach…”, let’s call this Option A, and […]
One of the most frustrating aspects of unsteady HEC-RAS modeling can be the model stabilization process. You know, you’ve gone to great lengths collecting the best survey/topo data and solid hydrology. Then you’ve painstakingly spent hours…possibly days entered all of that data only to find that once you press the “Compute” button, the model crashes. […]
Written by Chris Goodell, P.E., D. WRE | WEST ConsultantsCopyright © RASModel.com. 2010. All rights reserved.Here’s a classic case for interpolation of cross sections in a RAS model. Notice the drop in water surface to near critical depth at the grade break. Then, at the next cross section upstream of the break, RAS seems to […]