Unsteady flow modeling tends to be more complex and time-consuming than steady flow modeling. Instabilities become more of an issue, and addressing these instabilities is both an art and a … Read More
Selecting Manning’s n Values for 2D HEC-RAS Models
Manning’s roughness coefficient, also commonly referred to as Manning’s n, is an empirical parameter that represents energy loss due to various factors, including friction losses, flow separation, turbulence, and sudden … Read More
Rain-on-Grid Modeling in HEC-RAS
Runoff is a crucial component of the hydrologic cycle. Understanding how much water will be conveyed to hydraulic structures, such as storm drains, pipes, culverts, or water bodies, is critical … Read More
4 Tips for New HEC-RAS Modelers
HEC-RAS is a great software for hydraulic modeling. One of the reasons is that HEC-RAS is freely available and continues to be updated by the United States Army Corps of … Read More
What is a No-Rise?
If your project is located within a Federal Emergency Management Agency (FEMA) floodway, you may be seeking a “no-rise,” which is short for a no-rise certification. In short, a no-rise … Read More