Watershed Models Information ?

In article <9509221550.AA05543@samwise.colorado.edu> you wrote:
: Good Morning,

: This is a tenious Grass question. I'm interested in finding documentation on
: various watershed models and whta drives them interms of surface runoff, sub
: surface runoff etc. What parameters are being used etc.

: Does anyone know of a web site where this could be found. There has been talk of
: linking grass to various external watershed models.

: Thanks for the help.

: Jeremy Dunn