A lot of things can be investigated to improve 2D HEC-RAS model stability. This post covers some of the most critical factors to investigate when a model starts to act…
A lot of things can be investigated to improve 2D HEC-RAS model stability. This post covers some of the most critical factors to investigate when a model starts to act…
Often it is necessary to re-condition a DEM by burning streams or building walls to force a watershed to be delineated with known streams or boundaries (example: NHD streams or…
To apply the HEC-18 Equation 6.2 (Figure 1) to calculate the live-bed contraction scour depth, the bed material particle D50 fall velocity needs to be determined to estimate the coefficient…
Hydraulic Toolbox is a powerful tool to design riprap protection for channel banks, culvert outlets, and bridge scour countermeasures. This post is to focus on bridge pier and abutment scour countermeasure…
The hydraulic opening width (area) of a skewed bridge is less than its unskewed value, which in turn would adversely impact the bridge hydraulic performance. The skew angle is defined…
This article was revised and reposted because since HEC-RAS 6.7 (and the subsequent version 7.0), 2D bridge modeling has evolved significantly. The software now offers two distinct methods for simulating…