The Wey drains much of south west Surrey (as well as parts of east Hampshire and the north of West Sussex) and has a total catchment area of 904 square kilometres (350sqmi).[1] Although it is the longest tributary of the Thames (if the Medway is excluded), its total average discharge is lower than that of the Kennet and Cherwell. The river morphology and biodiversity of the Wey are well studied, with many places to take samples and record data. The main tributary is the Tillingbourne, which rises on the western slopes of Leith Hill and flows westwards to join the Wey to the south of Guildford, between Shalford and Peasmarsh.
The Wey north branch, sometimes referred to as the Alton Wey,[3] has its official nomenclature source in Alton in Hampshire; however is exceeded by length and, in wet weather, in flow by the nearby Caker Stream rising in dendritic drainage spanning fields of Upper Farringdon and Hartley Mauditt, passing Chawton between these places. After the union in Alton the brook runs quite straight, east north-east through Upper Froyle and Bentley, turning southeast after Farnham's centre to Tilford.[4]
The steep-sided valley accentuates entering Surrey, between vast masses termed the Lower Greensand Group (south), then down the more easterly valley on both sides (east and west). Reflecting the crumbly nature of this material which has readily eroded, the valley falls from about 230 feet (70m) entering Surrey1.5 miles (2.4km) west of Farnham to 60 feet lower at Tilford4 miles (6.4km) south-east of Farnham and changes from almost v-shaped to a more u-shaped alluvial plain.
The upper parts of the branch were the start of the upper River Blackwater's catchment.[3][5] The Wey captured this following cumulative flooding and deposition right up to around Aldershot. A vestige of this is that the upper Blackwater valley proper, north of today's wind gap, is not lower than 226 feet (69m) (Tongham Pool) and of very low gradient.[6] This transported distinctive gravels containing chert, to deposit them north of the gap in the chalky ridge at Farnham.[5] The source rocks of the gravels prove the former extent of the river.[5] Great erosion has occurred in the Wey down to Tilford, along the sinuous, multiple-anabranch Waverley Abbey stretch, through, what Blyth notes as, the "soft strata",[5] of that landscape.
Wey South
The Wey South branch stems from two main westward brooks, one now followed by the Portsmouth Direct Line,[n 2] the other – with longer source brooks – following the Surrey/Sussex boundary,[n 3] which combine at a point, heading west, where the line first comes as close as 97metres to the boundary – in the east end of a park, next to one of its three river footbridges. These brooks are fed by six main streams. The farthest are the southern streams. These drain parallel, north, narrow vales between the northerly "fingers" or "ribs" of:
Blackdown, the third-highest hill in Southeastern England
Ridge Hill
Fridays Hill
Marley Heights (formerly Moseshill), called Marley Common
The northern streams drain fingers of a single east–west ridge of Greensand, their common names, again from east to west, are:
Of varying size, these are long, sandy hills south-east of the upper tip of the Devil's Punch Bowl: Gibbet Hill, Hindhead. One of the northern streams adjoins strips of woodland named Weydown Common and Weycombe.
The south sources are specifically: a wood-surrounded neighbourhood, Kingsley Green (formerly Marsh) in Fernhurst;[8] Chase Farm marking the furthest point south in Surrey;[9] and upper fishponds at Wades Marsh marking the Fernhurst/Lurgashall boundary (both in West Sussex), next to the summit of Ridge Hill (which is the furthest source).[10]
The Wey drains and passes Haslemere's western suburbs then Liphook, Bramshott (including Passfield), Standford and Lindford, and the large parish of Frensham. It combines with the north branch at Tilford, in which parish all three flows have large meanders.
Notable tributaries of the south branch are Cooper's Stream and the River Slea.[4]
Combined river
From Tilford, the river runs through Elstead, Eashing, Godalming, Peasmarsh/Shalford, Guildford, Send, Old Woking, Pyrford, Byfleet, New Haw and forms the historically much more meandering border between Addlestone/Weybridge, today doing so most accurately between Hamm Court and Whittet's Ait respectively.[11][12][13] From Godalming the river is intertwined with the Wey and Godalming Navigations.[4] The 20 miles (32km) of the navigations' towpath is open to pedestrians. The river joins the Thames at a cascading channel off its Navigation Canal (above Thames Lock) between Hamm Court and Whittet's Ait and a weir-fed navigation east of the ait facing the main weir stream of Shepperton Lock.
The river has long been used as a source of power for mills, and many are recorded in the Domesday Book. Between the 17th and 19th centuries there were over 40 mills on the river and more on its tributaries. At various times they have been used for grinding grain, fulling wool, rolling oats, crushing cattle cake, leather dressing, paper production and gunpowder manufacture. Willey Mill, at Farnham, was still in use in 1953.[14]Headley Mill is still in commercial operation. [15]Guildford Town Mill, though no longer used for milling, still harnesses the power of the river to generate electricity.
During the seventeenth century, the river was made navigable to Guildford and extended in the eighteenth century to Godalming. The Basingstoke Canal and Wey and Arun Junction Canal were later connected to the river. The navigable sections are now owned by the National Trust.
Natural environment
Bank-full state between Pyrford and Wisley where it is separate from the Wey Navigation
Wey Valley is a term for the narrowing basin of the River Wey before it empties into the River Thames.
A broad basin of aquifers drain steeply to the river so, as with the Mole, in its natural state, much of the flood plains were prone to regular flooding. This has been greatly reduced by flood alleviation measures, upstream lakes such as Frensham Great Pond and, inadvertently, the Wey navigations. The lowest urban areas of Godalming, Byfleet and Weybridge saw extensive flooding in the exceptional winter storms of 2013–14.[16]
Water quality
The Environment Agency measure water quality of the river systems in England. Each is given an overall ecological status, which may be one of five levels: high, good, moderate, poor and bad. There are several components that are used to determine this, including biological status, which looks at the quantity and varieties of invertebrates, angiosperms and fish. Chemical status, which compares the concentrations of various chemicals against known safe concentrations, is rated good or fail.[17]
Surrey is a ceremonial county in South East England and one of the home counties. It is bordered by Greater London to the north east, Kent to the east, East and West Sussex to the south, and Hampshire and Berkshire to the west. The largest settlement is Woking.
The River Mole is a tributary of the River Thames in southern England. It rises in West Sussex near Gatwick Airport and flows northwest through Surrey for 80 km to the Thames at Hampton Court Palace. The river gives its name to the Surrey district of Mole Valley.
Godalming is a market town and civil parish in southwest Surrey, England, around 30 miles (49 km) southwest of central London. It is in the Borough of Waverley, at the confluence of the Rivers Wey and Ock. The civil parish covers 3.74 sq mi (9.7 km2) and includes the settlements of Farncombe, Binscombe and Aaron's Hill. Much of the area lies on the strata of the Lower Greensand Group and Bargate stone was quarried locally until the Second World War.
The Borough of Waverley is a local government district with borough status in Surrey, England. The council is based in the town of Godalming. The borough also contains the towns of Farnham and Haslemere and numerous villages, including the large village of Cranleigh, and surrounding rural areas. At the 2021 Census, the population of the borough was 128,200. The borough is named after Waverley Abbey, near Farnham. Large parts of the borough are within the Surrey Hills Area of Outstanding Natural Beauty.
South West Surrey is a constituency represented in the House of Commons of the UK Parliament. Since 2005, the seat has been represented by Conservative MP Jeremy Hunt, the current chancellor of the Exchequer and the former Culture Secretary, Health Secretary and Foreign Secretary.
Shepperton Lock is a lock on the River Thames, in England by the left bank at Shepperton, Surrey. It is across the river from Weybridge which is nearby linked by a passenger ferry.
The River Wey Navigation and Godalming Navigation together provide a 20-mile (32 km) continuous navigable route from the River Thames near Weybridge via Guildford to Godalming. Both waterways are in Surrey and are owned by the National Trust. The River Wey Navigation connects to the Basingstoke Canal at West Byfleet, and the Godalming Navigation to the Wey and Arun Canal near Shalford. The Navigations consist of both man-made canal cuts and adapted parts of the River Wey.
The River Tillingbourne runs along the south side of the North Downs and joins the River Wey at Guildford. Its source is a mile south of Tilling Springs to the north of Leith Hill at grid reference TQ143437 and it runs through Friday Street, Abinger Hammer, Gomshall, Shere, Albury, Chilworth and Shalford. The source is a semi-natural uninhabited area. The catchment is situated on sandstone which has a low rate of weathering. The Tillingbourne is 24 km (15 mi) in length.
The River Ock is a tributary of the River Wey in Surrey, England.
The River Bourne is the name given to a Thames tributary in northwest Surrey, England which has a longer tributary, the Windle Brook, that rises nears Bagshot Park in the south of Swinley Forest, Berkshire, merging with it while flowing through villages north of Woking; downstream the Bourne joins the Thames near Weybridge.
Dapdune Wharf is a former industrial wharf and boat yard on the Wey and Godalming Navigations in Guildford, England, UK, close to the Surrey County Cricket Club ground. It is now maintained by the National Trust.
The Cranleigh Waters or Bramley Wey is a tributary of the River Wey in Surrey.
The Pipp Brook is a left-bank tributary of the River Mole, Surrey, England. It rises at two main springs north of Leith Hill on the Greensand Ridge, then descends steeply in a northward direction, before flowing eastwards along the Vale of Holmesdale. It runs to the north of Dorking High Street, before discharging into the Mole at Pixham.
The River Slea is a tributary of the south branch of the River Wey in Hampshire.
The Wey barge was based on the earlier West Country barge designs and the first barges built specifically for use on the Wey were probably built at Honeystreet Wharf, near Devizes. The earliest that this could be was 1810 as the Kennet and Avon Canal was opened through to the Thames that year.
Many watermills lined the banks of the River Wey, England, from the 17th century, due to the river's ability to provide a reliable, year-round flow of water. These mills chiefly ground wheat, often referred to as corn, for flour and oats for animal feed though many were used in the production of other goods such as paper, cloth, leather, wire and gunpowder. The river was home to more mills per mile than anywhere else in Great Britain. The mill situated at Coxes Lock near Addlestone, Surrey, is the largest. There are many mills on the river's principal tributaries, such as the Tillingbourne, the Ock and some mills on the Whitmore Vale stream, Cranleigh Waters and Hodge Brook. The last commercial mill on the Tillingbourne, Botting's Mill at Albury, closed in 1991. Headley Water Mill, on the Wey South branch is still in business. Town Mill, Guildford still has a water turbine driven generator producing electricity for the town.
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