Add Observed Data to HEC-RAS 2D/Mapper
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- เผยแพร่เมื่อ 10 ก.ค. 2024
- There are new tools in HEC-RAS that allow you to add observed data to a 2D hydraulic (or, in this case, debris) model in Mapper. You do have to view them outside of mapper, which can be confusing. But its a really helpful tool and I describe it her.
- กีฬา
Dear Colleague. I want to thank you for all your work, not only as a HEC-RAS developer, but also for putting these tips on the TH-cam channel. HEC-RAS has become my only source of income, thanks to what I've learned from you and the rest of your team. God bless you. Hug from Portugal.
Hello Gibson, I have been following your videos on RAS analysis, and I find them incredibly helpful. I have a question regarding the datum. You mentioned the High-Water Mark (HWM) elevation as 6.4 feet, and you also mentioned some calculations with terrain. Could you please explain a bit more about your datum and how you arrived at the value of 693.4 feet after performing those calculations? I often get confused between HWM elevation and model projections.
For example, I have an HEC-RAS model projected in NAD_1983_UTM_Zone_16N. Additionally, I’ve collected HWM data from USGS, "Black Sharpie mark on red fire hydrant 2.25' above ground in the liberty ball field, hydrant is 9.3 meters from edge of parking lot" measure at 278.9 feet above NAVD88. How can I adjust the HWM height and compare it with the RAS-simulated stage?
Excellent video
I needed this explanation, thanks so much!
sorry for the inconvenience, I'm wondering if it is possible to export the simulation result in some grid format (eg .grd, .csv) to process this information in other languages and plot in Generic Mapping Tools (I need to create images for a scientific paper). I am not referring to exporting the .tiff of the raster, but to the numerical data that these show in RAS mapper. Would be a great help.
Try right clicking on the result map and selecting Export Layer-->Export Raster. This looks like it will just give you a .vrt file (which is a statistical summary) but it also generates a geotiff that you can just bring into a GIS. Or you can export a google map file.
All the results are stored in either DSS or hdf files. You can use R or Python to read those files automatically
So after adding observed WSEL using reference point, does the computed WSEL change at that location? or it stays the same and it's just for graphical visualization so that we can calibrate the model?
The computed WSEL updates based on your simulation just like it would if the observed wasn't there. So if you change the parameters and rerun, it will update.