grassedww.str

This file contains the grassed waterway parameters.

Grassed waterways are vegetated channels that transport runoff from a field. Vegetation within the waterways reduces flow velocities and protects the waterway from the scouring potential of concentrated flow. Grassed waterways are generally broad and shallow channels; the channel simulated in SWAT+ has a side slope of 8:1. Grassed waterways trap sediment and other contaminants by reducing flow velocities, which increases deposition of particulate contaminates.

Field	Description	Type	Unit	Default	Range
name	Name of the grassed waterway record	string	n/a	n/a	n/a
flag_grww	​Currently not used	integer
mann	Manning's n for grassed waterway	real	n/a	0.10	0.001-0.50
sed_co	Sediment transport coefficient	real	n/a	0.01	0.0-1.0
dp	Depth of grassed waterway	real	m	10.0	0.0-10.0
wd	Width of grassed waterway	real	m	1000.0	0.0-1000.0
len	Length of grassed waterway	real	km	10000.0	0.0-10000.0
slp	Slope of grassed waterway	real	m/m	1.0	0.0-1.0