Buddhist Dictionary of Pali Proper Names by G P Malalasekera
Gambhīranadī
Gambhīranadī:A river,one yojana north of Anurādhapura; the bricks for the Mahā Thūpa and for the Thupas of the three former Buddhas were prepared on its banks (Mhv.xxviii.7; MT.508).On its bank was Upatissagāma. Mhv.vii.44.