I am studying Hindu temples architecture, and I was wondering if the building place in respect to a river is something specific to the flowing direction of its waters.
The only answer I could find is Features in Temple architecture, which does not offer such detail.
For example, Belur Math Mandir entrance is facing East, with the river waters in front of it flowing right-to-left for one facing the temple.
So, it seems, the Temple should sit on that specific river bank.
Is that positioning something of importance, or just dictated by practical reasons?
Are such geo-location features of Hindu Temples specified in some sacred sciptures (rules in Sruti, Smriti?)