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Head Of Navigation
The head of navigation is the farthest point above the mouth of a river that can be navigated by ships. Determining the head of navigation can be subjective on many streams, as the point may vary greatly with the size or the draft of the ship being contemplated for navigation and the seasonal water level. On others, it is quite objective, being caused by a waterfall, a low bridge that is not a drawbridge, or a dam without navigation locks. Several rivers in a region may have their heads of navigation along a line called the fall line. Longer rivers such as the River Thames may have several heads of navigation depending on the size of the vessel. In the case of the Thames, that includes London Bridge, which historically served as the head of navigation for tall ships; Osney Bridge in Oxford, which has the lowest headroom of any bridge on the Thames that generally restricts navigation to smaller vessels such as narrowboats and cabin cruisers, and the long reach above St John ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
River Mouth
A river mouth is where a river flows into a larger body of water, such as another river, a lake/reservoir, a bay/gulf, a sea, or an ocean. At the river mouth, sediments are often deposited due to the slowing of the current, reducing the carrying capacity of the water. The water from a river can enter the receiving body in a variety of different ways. The motion of a river is influenced by the relative density of the river compared to the receiving water, the rotation of the Earth, and any ambient motion in the receiving water, such as tides or seiches. If the river water has a higher density than the surface of the receiving water, the river water will plunge below the surface. The river water will then either form an underflow or an interflow within the lake. However, if the river water is lighter than the receiving water, as is typically the case when fresh river water flows into the sea, the river water will float along the surface of the receiving water as an overflow. Al ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Osney Bridge
Osney Bridge is a road bridge across the River Thames in Oxford, England, built in 1888 to replace a stone bridge which collapsed in 1885. It carries the Botley Road (A420 road, A420) from Botley, Oxfordshire, Botley into Oxford. The Thames Path crosses the river on this bridge, just above Osney Lock. The original bridge was probably built by the monks of Osney Abbey, to carry the main road across the millstream of Osney Mill west of the island then known as Osney. By the early 17th century it was a three-arch stone construction. In 1790 the millstream became the main navigation channel of the river, and the bridge had become a serious obstruction to navigation by the mid 19th century. In 1885 the central arch collapsed, leaving massive piers. Proposals to raise Osney Bridge Osney Bridge has the lowest headroom (less than 7 feet 6 inches, or 2.3 metres) of any bridge across the navigable Thames; this limits the size of boats that can travel past it without having to be removed ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Lechlade
Lechlade () is a town at the edge of the Cotswolds in Gloucestershire, England, south of Birmingham and west of London. It is the highest point at which the River Thames is navigable, although there is a right of navigation that continues south-west into Cricklade, in the neighbouring county of Wiltshire. The town is named after the River Leach that joins the Thames near the Trout Inn and St. John's Bridge. The low-lying land is alluvium, Oxford Clay and river gravels and the town is surrounded by lakes created from disused gravel extraction sites, forming parts of the Cotswold Water Park; several have now been designated as Sites of Special Scientific Interest and nature reserves. Human occupation dates from the Neolithic, Iron Age and Roman periods and it developed as a trading centre served by river, canal, roads and railway, although the station closed in 1962. The Anglican Church of St Lawrence is a Grade I listed building dating from the 15th century. The develop ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Thames Head
Thames Head is a group of seasonal springs that arise in the Cotswolds, in the county of Gloucestershire, England. Their location is in fields near the villages of Coates and Kemble,Thames Pathway Ch1 Accessed 15 August 2015 on either side of the A433 road, about three miles south-west of the town of . The spring water comes from the s of the Cotswolds. One or more of these springs are traditionally identified as the [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
St John's Lock
St John's Lock, below the town of Lechlade, Gloucestershire, is the furthest upstream lock on the River Thames in England. The name of the lock derives from a priory that was established nearby in 1250, but which no longer exists. The lock was built of stone in 1790 by the Thames Navigation Commission. The main weir is downstream, just below St John's Bridge, where the River Cole and the River Leach join the Thames on opposite banks. A statue of Old Father Thames by Raffaelle Monti is outside the lock house. The statue was commissioned in 1854 for The Crystal Palace's grounds, was later moved to the traditional source of the Thames at Thames Head, and then in 1974 relocated to St John's Lock. The statue is Grade II listed. History The need for a pound lock here arose from the opening of the Thames and Severn Canal upstream in November 1789. It was built by J. Nock in 1790, and in its early days complaints were made of tolls being evaded by bullying bargemen. The first loc ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Cabin Cruiser
A cabin cruiser is a type of power boat that provides accommodation for its crew and passengers inside the structure of the craft. A cabin cruiser usually ranges in size from in length, with larger pleasure craft usually considered yachts. Many cabin cruisers can be recovered and towed with a trailer and thus easily stored on land, which reduces maintenance and expense. These craft are generally equipped with a head (toilet), a galley, and at least one berth. Most cabin cruisers usually have a small dining area and some have an aft cabin (a cabin to the rear of the cockpit, with a double bed). Some cabin cruisers are equipped with heating, air conditioning, and power generators. Most also have water heaters and shore power electric systems. The cabin cruiser provides many of the amenities of larger yachts, while costing much less and normally being fully operable by the owner, whereas larger yachts often require a professional crew. Most newer cabin cruisers are faster than o ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Narrowboat
A narrowboat is a particular type of Barge, canal boat, built to fit the narrow History of the British canal system, locks of the United Kingdom. The UK's canal system provided a nationwide transport network during the Industrial Revolution, but with the advent of the railways, commercial canal traffic gradually diminished and the last regular long-distance transportation of goods by canal had virtually disappeared by 1970. However, some commercial traffic continued. From the 1970s onward narrowboats were gradually being converted into permanent residences or as holiday lettings. Currently, about 8,580 narrowboats are registered as 'permanent homes' on Britain's waterway system and represent a growing alternative community living on semi-permanent moorings or continuously cruising. For any boat to enter a narrow lock, it must be under wide, so most narrowboats are nominally wide. A narrowboat's maximum length is generally , as anything longer will be unable to navigate much ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Oxford
Oxford () is a City status in the United Kingdom, cathedral city and non-metropolitan district in Oxfordshire, England, of which it is the county town. The city is home to the University of Oxford, the List of oldest universities in continuous operation, oldest university in the English-speaking world; it has buildings in every style of Architecture of England, English architecture since late History of Anglo-Saxon England, Anglo-Saxon. Oxford's industries include motor manufacturing, education, publishing, science, and information technologies. Founded in the 8th century, it was granted city status in 1542. The city is located at the confluence of the rivers Thames (locally known as the Isis) and River Cherwell, Cherwell. It had a population of in . It is north-west of London, south-east of Birmingham and north-east of Bristol. History The history of Oxford in England dates back to its original settlement in the History of Anglo-Saxon England, Saxon period. The name � ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
London Bridge
The name "London Bridge" refers to several historic crossings that have spanned the River Thames between the City of London and Southwark in central London since Roman Britain, Roman times. The current crossing, which opened to traffic in 1973, is a box girder bridge built from concrete and steel. It replaced a 19th-century stone-arched bridge, which in turn superseded a 600-year-old stone-built medieval structure. In addition to the roadway, for much of its history, the broad medieval bridge supported an extensive built up area of homes and businesses, part of the City's Bridge (City of London ward), Bridge ward, and its southern end in Southwark was guarded by a large stone City gateway. The medieval bridge was preceded by a succession of timber bridges, the first of which was built by the Roman Empire, Roman founders of London (Londinium) around AD 50. The current bridge stands at the western end of the Pool of London and is positioned upstream from previous alignments. Th ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Ships
A ship is a large vessel that travels the world's oceans and other navigable waterways, carrying cargo or passengers, or in support of specialized missions, such as defense, research and fishing. Ships are generally distinguished from boats, based on size, shape, load capacity and purpose. Ships have supported exploration, trade, warfare, migration, colonization, and science. Ship transport is responsible for the largest portion of world commerce. The word ''ship'' has meant, depending on the era and the context, either just a large vessel or specifically a ship-rigged sailing ship with three or more masts, each of which is square-rigged. The earliest historical evidence of boats is found in Egypt during the 4th millennium BCE. In 2024, ships had a global cargo capacity of 2.4 billion tons, with the three largest classes being ships carrying dry bulk (43%), oil tankers (28%) and container ships (14%). Nomenclature Ships are typically larger than boats, but there is no ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
River Thames
The River Thames ( ), known alternatively in parts as the The Isis, River Isis, is a river that flows through southern England including London. At , it is the longest river entirely in England and the Longest rivers of the United Kingdom, second-longest in the United Kingdom, after the River Severn. The river rises at Thames Head in Gloucestershire and flows into the North Sea near Tilbury, Essex and Gravesend, Kent, via the Thames Estuary. From the west, it flows through Oxford (where it is sometimes called the Isis), Reading, Berkshire, Reading, Henley-on-Thames and Windsor, Berkshire, Windsor. The Thames also drains the whole of Greater London. The lower Reach (geography), reaches of the river are called the Tideway, derived from its long Tidal river, tidal reach up to Teddington Lock. Its tidal section includes most of its London stretch and has a rise and fall of . From Oxford to the estuary, the Thames drops by . Running through some of the drier parts of mainland Bri ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Fall Line
A fall line (or fall zone) is the area where an upland region and a coastal plain meet and is noticeable especially the place rivers cross it, with resulting rapids or waterfalls. The uplands are relatively hard crystalline basement rock, and the coastal plain is softer sedimentary rock. A fall line often will recede upstream as a river cuts out the uphill dense material, forming "c"-shaped waterfalls and exposing bedrock shoals. Due to these features, riverboats typically cannot travel any further inland without portaging, unless locks are built. The rapid change of elevation of the water and resulting energy release make the fall line a good location for water mills, grist mills, and sawmills. Seeking a head of navigation with a ready supply of water power, people have long made settlements where rivers cross a fall line. Geography The slope of rivers crossing fall zones affected settlement patterns. For example, the fall line represents the inland limit of navigation of ma ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
