ID  Description		      Manning_n
11	Water			          0.025
12  Perennial_Ice_Snow  0.025
21	Dev_Open_Space		  0.01
22	Dev_Low_Intesity	  0.038
23	Dev_Med_Intensity	  0.056
24	Dev_High_Intensity	0.075
31	Barren_Land		      0.025
41	Decid_Forest		    0.1
42	Evergreen_Forest	  0.1
43	Mixed_Forest		    0.1
51  Dwarf_Scrub         0.035
52	Shrub			          0.035
71	Grass_Herb		      0.025
72  Sedge_Herb          0.025
73  Lichens             0.025
74  Moss                0.025
81	Pasture_Hay		      0.03
82	Cultivated_Crops	  0.025
90	Woody_Wetlands		  0.08
95	Emergent_Herb_Wet	  0.075
