HEC-HMS

Import Rain-on-Grid data

OAA Atlas 14 data are stored in 1000ths of inches, so select "in" for Units, and 1000 for Unit Scale Factor. A unit scale factor is typically used to store floating point data as integers, with the scale factor selected in order to preserve the desired level of precision.

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GIS

WORKFLOWS

Curve Number Calculation

First, you need to download the Annual NLCD (National Land Cover Database). You can download it from LINK.You can download as well the HSG (Hydrologic Soil Group) shapefile from LINK.

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