The Terdoppio is 86 kilometres (53 mi) long, with an average discharge of 3.7 cubic metres per second (130 cu ft/s) and a drainage basin of about 515 square kilometres (199 sq mi).
References
^LINEE GENERALI DI ASSETTO IDROGEOLOGICO E QUADRO DEGLI INTERVENTI BACINO DEL TERDOPPIO, Autorità di bacino del fiume Po; on-line in .pdf: www.adbpo.it (access:January 2015)
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