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Messages - pjsnyder

Using SLAMM / Surge Inundation Frequency Legend
March 19, 2019, 12:45:36 PM
Okay, one more question and then I should be done.

Is there any documentation of the legend for the inundation frequency output? There doesn't appear to be an option to look at this map (and therefore its legend) in the during-run mapping window analysis tools, and I can't find any mention in documentation aside from 30, 60, and 90 days. The GIS output has 0, 1, 4, 5, 6, and 7. 0 is clearly always-wet and 6 appears to be always-dry, but the other numbers are unclear.
When I use a storm surge raster that ends in 00_010.ASC, the program still searches for an 00_100 file. Will SLAMM only run the 10-year if there's also a 100-year to run? Does it run through both? It's not totally clear to me how this is implemented. I was thinking that I could run separate runs: one with the 100-year surge over the SLR period, and one with the 10-year over the SLR period (actually, and one more just using the spring tide over the SLR period) and these would give me what those storms would look like in future years. Is that not what the model is doing?
Using SLAMM / Storm Surge Raster datum
March 15, 2019, 08:00:09 AM
The user manual calls for the storm surge raster to be in NAVD88. However, I already have my DEM in MTL, so I am not using a datum correction for the DEM elevation. I assume that the surge should be in the same datum as the DEM, but the manual gives me pause since it calls for NAVD. I just wanted to make sure there isn't some additional behind-the-scenes datum conversion going on for the surge (beyond what you might input in the VDATUM file or MTL-NAVD conversion factor)