Comparison with exiting HEC-RAS method

[bzjoe]

I used both tabbed methods successfully, but the Open Channel was most impressive. I used a custom shape derived from a GIS cross section profile with elevations in feet and Mannings N values extracted from NAIP imagery. I've developed GIS tools in QGIS to do relative measurements of the channel area and to also determine the engineering slope. It worked perfectly and the Crest Value matched the HEC-RAS result. However, all my measurements and input were in feet, and the US feet setting worked on my home computer 3.44.11 but on my work computer that's an older version. The US units did not seem to be retained but I calculated the same answer.

This is a nice program - of course I would like to see it interact more with geospatial layers but maybe latter. Have been focused on the GIS tools with a toolbox I use and I'm excited about automating the process by using staged frequency method to identify the left and right banks and using landcover/aerial photography for Mannings N values.

Thank you for sharing your tool👍