Bhutan has not stopped flow of any ‘irrigation water’ to India.
Instead every year Bhutan allows Assamese farmers to come across &divert section of a river in Bhutan into channels that irrigate few farms in Assam.
This year border sealed to ALL foreigners due to COVID-19.
Even Bhutanese coming into Bhutan since March have to undergo a mandatory 21-day quarantine & tests before being released into the population.
This is how we have prevented community transmission so far.
Please don’t politicize this or draw non-existential inferences.
However, in monsoon sudden rainfall and floods also damage Bhutanese irrigation systems including the drinking water in Thimphu.