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There are twenty five rivers of at least in total within the boundaries of the four ceremonial counties that form Yorkshire. All officially designated Rivers are listed below, including the shortest Main River in England, the River Bain measuring . The majority of these waterways lie wholly within the county boundaries, except for; the Ribble, which flows into the Irish Sea at Lytham; the Rother, whose source is located in Derbyshire Peak District; the Greta, which flows into Lancashire to join the River Lune; and the Tees, which flows partly within County Durham and forms some of the boundary with North Yorkshire. The direction of stream flow in Yorkshire is influenced by the three major drainage divides. The Pennines in the west and south, the North York Moors in the north-east and the Yorkshire Wolds, the coastal range of hills on the east. This represents a large drainage area that mostly flows into the Vale of York and into the North Sea via the River Humber. Though named a river, the Humber is considered to be an estuary. The Humber river system is tidal as far inland as Naburn Lock on the River Ouse,〔(【引用サイトリンク】title=Tidal Ouse )〕 Knottingley on the River Aire〔(【引用サイトリンク】title=Tidal Aire )〕 and Askern on the River Don.〔(【引用サイトリンク】title=Tidal Don )〕 The River Humber has the second largest tidal range in the UK at . The largest is the Bristol Channel at nearly double that range.〔(【引用サイトリンク】title=Tidal reach )〕 Source data for the table below came from the National Environment Research Council Centre for Ecology and Hydrology, Ordnance Survey, Environment Agency and Google Earth. In the table, total lengths are given in miles (mi) and kilometres (km), and elevations are in feet (ft) and metres (m). River lengths are taken from actual source when wholly within the Yorkshire County boundary, else measured from where the river enters or leaves the county. ==Images== File:The River Esk Whitby - geograph.org.uk - 699328.jpg|The River Esk at Whitby File:The River Aire - geograph.org.uk - 488849.jpg|The River Aire and the Leeds-Liverpool canal in Leeds File:RiverSheafJoinsDonAtSheffield038.jpg|River Sheaf joins River Don at Sheffield File:Tidal Barrier, River Hull, Kingston upon Hull - geograph.org.uk - 660413.jpg|Tidal Barrier on River Hull at Kingston upon Hull File:Victoria Bridge - lvm15.jpg|Victoria Bridge on River Tees in Stockton-On-Tees File:The road bridge at Stamford Bridge over the River Derwent.jpg|The road bridge at Stamford Bridge over the River Derwent File:River Wharfe at Tadcaster geograph-402598-by-John-Wray.jpg|River Wharfe at Tadcaster File:Richmond Castle and the River Swale - geograph.org.uk - 276639.jpg|Richmond Castle and the River Swale File:River Ure - geograph.org.uk - 150944.jpg|River Ure at Boroughbridge File:River Nidd and railway viaduct - geograph.org.uk - 1120338.jpg|River Nidd and railway viaduct at Knaresborough 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「List of rivers of Yorkshire」の詳細全文を読む スポンサード リンク
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