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Gradient

Field name = [GRADIENT]
Reach gradient (rise/run, m/m) is calculated from digital elevation models (commonly 10-m DEMs or LiDAR DEMs) at the scale of channel segments (20 – 200 m). The DEM-inferred gradient using the DEM-delineated flow path uses a nine-point surface polynomial as described by Zevenbergen and Thorne (1987). See NetMap's full online Technical Help.
 
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