found: Work cat.: Unicomarine Ltd. Biological studies of the Stour and Orwell estuaries and Harwich Haven approach, 2006.
found: GEOnet, 3 May 2007(Orwell, River, 51⁰58ʹ00ʺN 001⁰18ʹ00ʺE)
found: Wikipedia, 3 May 2007(The River Orwell flows through the county of Suffolk in England. Its source river, above the tidal limit, is known as the River Gipping. It broadens into an estuary at Ipswich and flows into the North Sea at Felixstowe after joining with the River Stour at Shotley. In the name Orwell, Or- comes from an ancient river-name probably pre-Celtic; but -well probably indicates an Anglo-Saxon naming)
