Mangapai River
The Mangapai River is a river of the Northland Region of New Zealand's North Island. It is perhaps better described as a silty arm of Whangarei Harbour, located due south of Whangarei. Its average width is some, but the silty nature of its course means that the stream itself is far narrower.
The New Zealand Ministry for Culture and Heritage gives a translation of "good stream" for Mangapai.