Laruma River

Kogin Laruma hakikar mashigar ruwa ce a Bougainville a cikin tsibiran Solomon na Tekun Fasifik.  Laruma yana bakin gabar yamma na tsibirin a gefen farar kasan tudun Keriaka, Laruma ya ratsa cikin lambatun Sulemanu. Bakin kogin yana arewacin ƙauyen Laruma (yawan jama'a ɗari da arba'in da ɗaya 141 a shekarar alif dubu ɗaya da ɗari tara da saba'in da biyu 1972  ) da kudancin Turupei.  Kogin Laruma yana nuna iyaka tsakanin yaren Bannoni - masu magana da harshen kudu da harshen Pivu - masu magana da mutanen arewa.  A cikin shekara ta alif dubu biyu da ɗaya 2001, kwarin Laruma yana da yawan jama'a goma sha huɗu 14 a kowace km2. 

 Manazarta