What is the issue? As far as I understand, there is a lake named Wullar, whose source is Jhelum. During winters, levels in Jhelum drop far too low to allow for any navigation.
India holds that the barrage can take water away from the lake and increase the flow in Jhelum, making it navigable.
Pakistan holds that India can therefore, control the flow in the river and hence, use it as a geo-strategic weapon. This is a violation of the Indus Water Treaty.
In what way is my idea wrong?
I don't like to reply to idiots and if you think I am referring to you, you are probably correct.