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The River Ottery ((コーンウォール語:Otri))〔(Place-names in the Standard Written Form (SWF) ) : (List of place-names agreed by the MAGA Signage Panel ). Cornish Language Partnership.〕 is a small river in northeast Cornwall, United Kingdom. The river is about twenty miles (33 km) long from its source southeast of Otterham to its confluence with the River Tamar at Nether Bridge, two miles (3 km) northeast of Launceston.〔() CornwallRivers Project. Retrieved April 2010〕〔Ordnance Survey: Landranger map sheet 190 ''Bude & Clovelly'' ISBN 978-0-319-23145-6〕 The headwaters of the River Ottery are within the civil parish of Otterham but formerly came under the parish of Forrabury and Minster. In 1311, the rector of that parish wrote: ''..the river Ottery takes its rise in this parish and flows to Canworthy Water and so by Yeolmbridge to the river Tamar.〔() Boscastle village website; Otterham Church; retrieved April 2010〕 ==Hydrology and course== With its tributaries, the River Ottery forms a major sub-catchment of the Tamar system, draining of north Cornwall. The River Ottery's catchment area is within the Carboniferous geological formation known as the Culm Measures which stretches from Dartmoor to north Devon and across northeast Cornwall as far west as Bodmin Moor.〔() CornwallRivers Project. Retrieved April 2010〕〔() English Nature website. Retrieved April 2010〕 The infant river initially flows north until it reaches the hamlet of Trengune. From here it adopts an east-southeasterly course which it follows to its confluence with the River Tamar. The largest tributaries to the River Ottery are Caudworthy Water and Bolsbridge Water which join the River Ottery from the north and Canworthy Water which joins from the south. The River Ottery system was severely affected by flooding in north Cornwall on 16 August 2004 when up to eight inches of rain fell during a single afternoon.〔() Met Office report. Retrieved April 2010〕 The Ottery headwaters at Marshgate and Otterham were the most severely affected. The river flows through an isolated area of mixed farming and the only riverside settlements of any size are Canworthy Water and Yeolmbridge. 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 Ottery」の詳細全文を読む スポンサード リンク
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