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NOAA-OWP / inundation-mapping

Flood inundation mapping and evaluation software configured to work with U.S. National Water Model.
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Explore Manning N as a function of landcover from datasets in literature #430

Open BradfordBates-NOAA opened 3 years ago

BradfordBates-NOAA commented 3 years ago

From Greg Cocks:

Based on a literature search, 25 correlations have been located and summarised in a crosswalk.

Task: Hydrologists in conjunction with the modelers to review these literature search results – and develop (a) modeling crosswalk(s)

It seems likely that a series of crosswalks will be needed, based on regional hydrologic, geologic, soil, topographic and/or other morphologies.

Further, this will almost certainly be an iterative process, with the crosswalk(s) being refined as model runs are undertaken - and the assignments adjusted as part of the overall FIM parameter sensitivity analyses and testing (i.e. based on real world benchmarks, etc)

NLCD_Mannings_working_GJC_Apr21.xlsx

frsalas-noaa commented 3 years ago

For rating curves, before exploring further, let's wait to receive the draft NWM v3.0 routeLink which already has N values for the floodplain derived from land use/land cover.

BradfordBates-NOAA commented 3 years ago

Sounds good. I will mark as low priority until that time.

GregCocks-NOAA commented 3 years ago

NLCD_Mannings_working_GJC_Apr21 onward.xlsx This Jun. '21 version includes another column derived from the latest HEC-RAS manual