It has been learned that Devegowda is said to advise his son not to tread the confrontational route and adopt a flexible strategy while handling both – the Centre and Tamil Nadu.
Devegowda had instead asked to go for a compromise in the interest of both the state and the coalition government.
Kumaraswamy is expected to write a detailed letter to PM Modi and Union Water Resources Minister Nitin Gadkari, seeking redressal in a weeks time.
The Centre constituted the controversial Cauvery Management Authority without the Karnataka representatives last week. The state had earlier refused to nominate its members citing inconsistencies in the process.