River Tay
The River Tay emerges from Loch Tay at Kenmore, and flows from there to Perth which, in historical times, was its lowest bridging point. Below Perth the river becomes tidal and enters the Firth of Tay. The largest city on the river, Dundee, lies on the north bank of the Firth. On reaching the North Sea, the River Tay has flowed from west to east across central Scotland.
Environment of Scotland
Scotland is bordered to the east by the North Sea and to the north and west by the Atlantic Ocean. Scotland has many rivers, lochs, reservoirs and estuaries. The River Tay is Scotland's longest river and is 193 kilometres (120 mi) long. Lakes in Scotland are known as lochs, with the exception of the Lake of Menteith and a few man-made lakes. The largest loch is Loch Lomond and is 71.1 km (27.5 sq. mi) in area and is Britain's largest freshwater body.