The Nadela originates from the Botoš sluice gate on the Canal Danube-Tisa-Danube-Tamiš crossing, at an altitude of 73 m.
The Nadela receives several tributaries and canals, mostly in its latter section: Verovac, Dolovački Begej, Crepajski kanal, Srednji Begej, Ponjavica, etc.