The River Axe is formed by the water entering the cave systems and flows through the third and first chambers, from which it flows to the resurgence, through two sumps and long, where it leaves the cave and enters the open air. It is the second largest resurgence on Mendip, with an estimated catchment area of, and an average discharge of per second. Some of the water is allogenic in origin i.e. drained off non-limestone rocks, collecting as streams on the surface before sinking at or near the Lower Limestone Shale — Black Rock Limestone boundary, often through swallets. One such is Plantation Swallet near St Cuthbert's lead works, between the Hunter's Lodge Inn and Priddy Pools. It then passes through major cave systems such as Swildon's Hole, Eastwater Cavern and St Cuthbert's Swallet, around Priddy, but 95% is water that has percolated directly into the limestone. From Wookey Hole village the river flows through a ravine and then west through the village of Wookey. At Wookey the River splits into two channels with the ‘Lower River Axe’ running past to the south of the village west towards Henton and then onto Panborough Moor where it joins a series of rhynes and drains supplying water to the wetland in the area. The Lower River Axe then runs north along the west most edge of Knowle Moor whilst the River Axe continues west through the same moor. The two channels meet again on the boundary between Knowle and Panborough Moors. The river continues northwest past Wedmore Moor and through Oxmoor, Stoke Moor and Monk Moor. The river passes through the settlement of Lower Weare and on to the south of Loxton. From this point until it passes between Uphill Cliff and Brean Down, then reaches the coast at Weston Bay, the river forms the boundary of Sedgemoor and North Somerset. Tributaries of the Axe include three rivers called Yeo: the Cheddar Yeo, the Mark Yeo and the Lox Yeo.
History
The name derives from a Common Brittonic word meaning "abounding in fish", which is also the root for the River Axe in Lyme Bay as well as the Exe, Esk, Usk and other variants. The name is cognate with :wikt:pysg|pysg, the Welsh word for fish. The lower reaches of the Axe have a history of navigation from the harbour at Uphill through to the settlement of Weare. The current tidal limit of the Axe is the sluice gates at Bleadon and Brean Cross. In the Middle Ages overseas trade was carried out from the port of Rackley, which is now north of the river as the course has been diverted. Rackley is now a farm below Crook Peak and west of Axbridge, which also had wharves. In the 14th century a French ship sailed up the river and by 1388 Thomas Tanner from Wells used Rackley to export cloth and corn to Portugal, and received iron and salt in exchange. Later slate was imported through this route and it may have still be possible to trade through Rackley until the act of 1915 authorising the drainage of the Axe and installation of the flood gate at Bleadon. Bleadon had been a small port, sometimes known as Lympsham Wharf, for many years, with the arrival of the railway in 1841 making this the furthest navigable point. It was last used by the ketch Democrat in 1942. A series of 11 watermills were powered by the river but the only one which remains is at Burcott.
