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