The easiest method would be the constant discharge method baseflow
Separation. Although it's an easy method to apply one could argue that
the baseflow will continue to decrease beyond the start of the flood
runnoff, to the time when the flood runoff is maximum. So it's easy to
argue with the conceptual basis of the method.

A BFI sofware :

http://www.usbr.gov/pmts/hydraulics_lab/twahl/bfi/
www.ce.utexas.edu/prof/maidment/gradhydro2005/baseflow/BaseFlow.doc

Hope it can helps,

Regards




> Dear colleagues,
>
> Can anyone suggest a simple and fast model/technique/software for
base flow separation from a natural streams
>
> thanks in advance
>
> Rakesh
>
>
> Rakesh.K.N.
> Assistant Field Hydrologist,
> Asoka Trust for Research in Ecology and Enviornment,
> Bangalore-24
> India
>
> Ph:+91-9448904921, +91-80-23530069
> rakesh@a...