In the Vinony graph
Vinony's link graph records 296 inbound references to Raimangal River, and connects out to Karnaphuli, Karatoya River and Gorai-Madhumati River.
The entry is geolocated on the map.
Vinony files it under Geography of South 24 Parganas district, International rivers of Asia and Rivers of Bangladesh.
Vinony links it to 5 Wikipedia language editions.