# The wflow_gr4 model¶

Warning

The documentation is incomplete

## Introduction¶

An experimental implementation of the gr4 model. It is based on the hourly (gr4h) version

[PM]

## Configuration¶

The model needs a number of settings in the ini file. The default name for the ini file is wflow_gr4.ini.

See below for an example:

[model]

Tslice=1
# Maximum upstream distance to update the flow in metres

[gr4]
dt = 1
B = 0.9
D = 1.25
X4 = 32.83
# X1,X2 and X3 are given as .tbl files or maps

[layout]
# if set to zero the cell-size is given in lat/long (the default)
sizeinmetres = 1

[outputmaps]