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The Boyle River is a river in Ireland. It forms part of the Shannon River Basin. It flows from Lough Gara on the Sligo/Roscommon border and flows through the town of Boyle to Lough Key. From there is flows eastwards through the village of Knockvicar to the River Shannon at ''Lough Drumharlow'', near Carrick-on-Shannon. The length of the Boyle River (from its source in Mayo to the Shannon) is 64.4 km (40ml).〔(Notes on River Basins: Page 64 )〕 The area of the Boyle river basin is 725 km2〔Dublin Marine Institute 1998: Studies of Irish Rivers and Lakes: Moriarty, Christopher - Table 10.1.〕 ==Boyle River Basin== The Upper Shannon catchment, above Carrick-on-Shannon (area: 1,301 km2〔(Leitrim County Council Table 16.8 )〕) has two distinct reaches: The River Shannon (basin area: 576 km2) which rises in Cavan and the Boyle River (basin area: 725 km2), with its source in Mayo which have their confluence at Lough Eidin/Drumharlow approximately 4.7 km upstream of Carrick-On-Shannon. The Boyle River has its origins in the rivers Lung and Breedoge which flow into Lough Gara. The 29 km (18 mi) (Lung River ) is fed by Urlaur Lough and Errit Lough on the Mayo/Roscommon border.〔(Urlaur Lough )〕〔(Errit Lough )〕 The river flow from the furthest reaches of the Boyle catchment to Limerick city has a measurement of 290 km (180ml).〔(River Habitat Survey, Fig. 2 )〕 When added to the Shannon's 102.1 km (63.5ml) estuary this gives a total river flow of 392.1 km (243.5ml), which makes it the longest river within the River Shannon basin (from source to mouth), 31.6 km (19.5ml) longer than the Shannon Pot source.〔(European Commission Rivers Map )〕 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「Boyle River (Ireland)」の詳細全文を読む スポンサード リンク
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