Template:Landuse Raster to Mannings N

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Landuse Raster to Mannings N

This tool converts a landuse raster (NLCD, C-CAP, etc.) to a Mannings N dataset. The tool has the following options:

  • Input landuse raster – Select which landuse raster in the project will be the input.
  • Landuse raster type – Select which type the landuse raster is.
    • "NLCD" – Sets the landuse raster type to National Land Cover Dataset (NLCD). A mapping table file for NLCD can be found here and down below.
    • "C-CAP" – Sets the landuse raster type to Coastal Change Analysis Program (C-CAP). A mapping table file forC-CAP can be found here and down below.
    • "Other" – Sets the landuse raster type to be set by the user.
  • Target grid – Select the grid that will be the target.
  • Landuse to Mannings N mapping table The Select File... button allows a table file to be selected. Its full file name will appear on the box to its right.
  • Default Mannings N option – Select which of the following will be used as the default for Mannings N. The option that is selected will populate an option in the dialog.
    • "Constant" – Sets a constant value to be the default for Mannings N.
      • Default Mannings N value – Sets a constant value to be the default for Mannings N.
    • "Dataset" – Sets a dataset to be the default for Mannings N.
      • Default Mannings N dataset – Select a dataset to be used as the default for Mannings N.
  • Subset mask dataset (optional) – Select a dataset to be used for the subset mask, which is optional.
  • Output Mannings N dataset – Enter the name for the new Mannings N dataset


Quadratic Friction NLCD Mapping Table

Quadratic Friction NLCD Values
Code Description Friction
0 Background 0.002
1 Unclassified 0.002
11 Open Water 0.0018
12 Perennial Ice/Snow 0.00046
21 Developed Open Space 0.0018
22 Developed Low Intensity 0.011
23 Developed Medium Intensity 0.046
24 Developed High Intensity 0.1
31 Barren Land (Rock/Sand/Clay) 0.037
41 Deciduous Forest 0.046
42 Evergreen Forest 0.055
43 Mixed Forest 0.046
51 Dwarf Scrub 0.0073
52 Shrub/Scrub 0.011
71 Grassland/Herbaceous 0.0053
72 Sedge/Herbaceous 0.0041
73 Lichens 0.0033
74 Moss 0.0028
81 Pasture/Hay 0.005
82 Cultivated Crops 0.0062
90 Woody Wetlands 0.046
95 Emergent Herbaceous Wetlands 0.0092
91 Palustrine Forested Wetland 0.046
92 Palustrine Scrub/Shrub Wetland 0.01
93 Estuarine Forested Wetland 0.046
94 Estuarine Scrub/Shrub Wetland 0.01
96 Palustrine Emergent Wetland (Persistent) 0.0092
97 Estuarine Emergent Wetland 0.0092
98 Palustrine Aquatic Bed 0.001
99 Estuarine Aquatic Bed 0.001


Quadratic Friction CCAP Mapping Table

Quadratic Friction CCAP Values
Code Description Friction
0 Background 0.002
1 Unclassified 0.002
2 Developed High Intensity 0.1
3 Developed Medium Intensity 0.046
4 Developed Low Intensity 0.011
5 Developed Open Space 0.0018
6 Cultivated Crops 0.0062
7 Pasture/Hay 0.005
8 Grassland/Herbaceous 0.0053
9 Deciduous Forest 0.046
10 Evergreen Forest 0.055
11 Mixed Forest 0.046
12 Scrub/Shrub 0.011
13 Palustrine Forested Wetland 0.046
14 Palustrine Scrub/Shrub Wetland 0.01
15 Palustrine Emergent Wetland (Persistent) 0.0092
16 Estuarine Forested Wetland 0.046
17 Estuarine Scrub/Shrub Wetland 0.01
18 Estuarine Emergent Wetland 0.0092
19 Unconsolidated Shore 0.002
20 Barren Land 0.037
21 Open Water 0.0018
22 Palustrine Aquatic Bed 0.001
23 Estuarine Aquatic Bed 0.001
24 Perennial Ice/Snow 0.00046
25 Tundra 0.002


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