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The Tamar (; (コーンウォール語:Dowr Tamar))〔(Place-names in the Standard Written Form (SWF) ) : (List of place-names agreed by the MAGA Signage Panel ). Cornish Language Partnership.〕 is a river in south west England, that forms most of the border between Devon (to the east) and Cornwall (to the west). The area is a World Heritage Site due to its historic mining activities. The Tamar's source is less than from the north Cornish coast, but it flows southward and its course runs across the peninsula to the south coast. The total length of the river is .〔(Britannica ) River Tamar, United Kingdom〕 At its mouth, the Tamar flows into the Hamoaze before entering Plymouth Sound, a bay of the English Channel. Tributaries of the river include the rivers Inny, Ottery, Kensey and Lynher (or ''St Germans River'') on the Cornish side, and the Deer and Tavy on the Devon side. The name Tamar (or Tamare) was mentioned by Ptolemy in the second century in his ''Geography''. The name is said to mean "Great Water."〔Furneaux, Robert. The Tamar: A Great Little River. Ex Libris Press. 1992.〕〔Foot, Sarah. The River Tamar. Bossiney Books. 1989.〕〔Neale, John. Discovering the River Tamar. Amberley. 2010.〕 The Tamar is one of several British rivers whose ancient name is assumed by some to be derived from a prehistoric river word apparently meaning "dark flowing" and which it shares with the River Thames. The seventh century ''Ravenna Cosmography'' mentions a Roman settlement named Tamaris, but it is unclear which of the towns along the Tamar this refers to. Plymouth, Launceston and the Roman fort at Calstock have been variously suggested. == Environment == The river (and/or land on its banks) is designated as a Site of Special Scientific Interest (SSSI), a European Special Area of Conservation, and an Area of Outstanding Natural Beauty.〔http://www.tamarproject.org.uk/about-the-river-tamar-project/〕〔(【引用サイトリンク】title=BBC – Devon – Discover Devon – Devon's rivers: The Tamar )〕 It is also designated as a UNESCO World Heritage Site as part of the Cornwall and West Devon Mining Landscape.〔(【引用サイトリンク】title=Tamar Valley & Tavistock )〕〔(【引用サイトリンク】title=Tamar Valley – Mining Heritage Project )〕 In November 2013, South West Water was fined £50,000 after it admitted permitting the discharge of sewage from its Camels Head treatment plant into a tributary of the River Tamar for eight years.〔(【引用サイトリンク】title=Water firm fined £50,000 after admitting sewage was discharged into Plymouth's River Tamar for eight years – Plymouth Herald )〕 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「River Tamar」の詳細全文を読む スポンサード リンク
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