Misplaced Pages

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26-592: The Mackay River is a 13.4-mile-long (21.6 km) tidal river in Glynn County, Georgia . It flows between Saint Simons Island to the east and the mainland, including the city of Brunswick , to the west, and connects to Buttermilk Sound at its north end and St. Simons Sound and the Brunswick River at its south end. It runs parallel to and west of the Frederica River . The Mackay River

52-435: A "river reach." In terms of tides, tidal rivers are classified as microtidal (<2 m), mesotidal (2-4 m), and macrotidal (>4 m). Areas of brackish water seaward of the tidal river section are often called estuaries . A phenomenon commonly associated with tidal rivers is a tidal bore , where a wall of water travels upriver during a flood tide. Freshwater tidal rivers discharge large amounts of sediment and nutrients into

78-831: A crucial role during the age of the steamboat. The first steam-powered vessel to enter the Skeena was the Union in 1864. In 1866 the Mumford attempted to ascend the river but was only able to reach the Kitsumkalum River . It was not until 1891 that the Hudson's Bay Company sternwheeler the Caledonia successfully negotiated through the Kitselas Canyon and reached Hazelton . A number of other steamers were built around

104-401: A pair of tall smokestacks belching smoke and cinders, and twin double-acting pistons driving a large paddlewheel at the stern, churning foam. This type of propulsion was an advantage as a rear paddlewheel operates in an area clear of snags, is easily repaired, and is not likely to suffer damage in a grounding. By burning wood, the boat could consume fuel provided by woodcutters along the shore of

130-474: A shallow river with a large coastal mouth. In some cases, high tides impound downstream flowing freshwater, reversing the flow and increasing the water level of the lower section of river, forming large estuaries . High tides can be noticed as far as 100 kilometres (62 mi) upstream. Oregon's Coquille River is one such stream for which that effect can be noticed. The area of a tidal river can be difficult to define. The term "tidal river" generally encompasses

156-699: Is a watercraft designed for inland navigation on lakes , rivers , and artificial waterways . They are generally equipped and outfitted as work boats in one of the carrying trades, for freight or people transport, including luxury units constructed for entertainment enterprises, such as lake or harbour tour boats . As larger water craft, virtually all riverboats are especially designed and constructed, or alternatively, constructed with special-purpose features that optimize them as riverine or lake service craft, for instance, dredgers , survey boats, fisheries management craft, fireboats and law enforcement patrol craft. Riverboats are usually less sturdy than ships built for

182-669: Is crossed by the F.J. Torras Causeway traveling between Brunswick and Saint Simons. It is part of the Intracoastal Waterway . The river most likely was named after Captain James Mackay, a pioneer citizen. This article related to a river in the US state of Georgia is a stub . You can help Misplaced Pages by expanding it . Tidal river Generally, tidal rivers are short rivers with relatively low discharge rates but high overall discharge, which generally implies

208-644: Is known as water taxi in English-speaking countries, vaporetto in Venice, water/river tramway in former Soviet Union and Poland (although sightseeing boats can be called water tramways too). Local waterborne public transport is similar to ferry. The transport craft shown below is used for short-distance carriage of passengers between villages and small cities along the Yangtze, while larger craft are used for low-cost carriage over longer distance, without

234-707: The Colorado , Columbia , and Sacramento rivers. These American riverboats were designed to draw very little water, and in fact it was commonly said that they could "navigate on a heavy dew". Australia has a history of riverboats. Australia's biggest river, the Murray , has an inland port called Echuca . Many large riverboats were working on the Murray, but now a lower water level is stopping them. The Kalgan River in Western Australia has had two main riverboats,

260-518: The Silver Star , 1918 to 1935, would lower her funnel to get under the low bridge. Today, the Kalgan Queen riverboat takes tourists up the river to taste the local wines. She lowers her roof to get under the same bridge. It is these early steam-driven river craft that typically come to mind when " steamboat " is mentioned, as these were powered by burning wood, with iron boilers drafted by

286-638: The Three Gorges , one-way travel was enforced through fast narrows . While less maneuverable and deeper draft vessels were obliged to wait for clearance, these high-speed boats were free to zip past waiting traffic by running in the shallows. Smaller riverboats are used in urban and suburban areas for sightseeing and public transport. Sightseeing boats can be found in Amsterdam, Paris, and other touristic cities where historical monuments are located near water. The concept of local waterborn public transport

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312-538: The Amazon depression. The tidal behaviour of a river is an important consideration in riverboat navigation. For major rivers, such as the Saint Lawrence River (and the associated Saint Lawrence Seaway ), publications such as an atlas of surface currents (or tidal currents) may be available, based on sophisticated hydrodynamic models, subject to empirical validation. Riverboat A riverboat

338-519: The Middle Ages, towpaths were built along most waterways to use working animals or people to pull riverboats. In the 19th century, steamboats became common. The most famous riverboats were on the rivers of the midwestern and central southern United States , on the Mississippi , Ohio and Missouri rivers in the early 19th century. Out west, riverboats were common transportation on

364-513: The Mississippi River that could operate in water under two metres deep. While a ferry is often used to cross a river, a riverboat is used to travel along the course of the river, while carrying passengers or cargo, or both, for revenue. (Vessels like ' riverboat casinos ' are not considered here, as they are essentially stationary.) The significance of riverboats is dependent on the number of navigable rivers and channels as well as

390-491: The Yangtze River, typically employees have double duties: both as serving staff and as evening-costumed dancers. Smaller luxury craft (without entertainment) operate on European waterways - both rivers and canals, with some providing bicycle and van side trips to smaller villages. High-speed boats such as those shown here had a special advantage in some operations in the free-running Yangtze. In several locations within

416-411: The area upriver of the maximum limit of salinity intrusion and downriver of tidal water level fluctuations. This classification is based on both tidal trends and salinity. By this definition, a tidal river will be affected by tides, surges, and sea level variation, though its water may not have a high salinity content. If that is the case, this section of river can be known as a "tidal freshwater river" or

442-423: The condition of the road and rail network. Generally speaking, riverboats provide slow but cheap transport especially suited for bulk cargo and containers . As early as 20,000 BC people started fishing in rivers and lakes using rafts and dugouts . Roman sources dated 50 BC mention extensive transportation of goods and people on the river Rhine . Upstream, boats were usually powered by sails or oars . In

468-457: The fancy food or shows seen on the tourist riverboats. In some cases, the traveller must provide their own food. As the major rivers in China are mostly east-west, most rail and road transport are typically north-south. As roads along the rivers are inadequate for heavy truck transport and in some cases extremely dangerous, drive-on/drive-off ramp barges are used to transport trucks. In many cases

494-513: The highest flow, largest volume of sediment discharge, and largest drainage basin of any river in the world. Because of its large flow volume, saltwater never enters the mouth of the Amazon River, and the limit of salinity is 150 km seaward of the river mouth. The Amazon River is classified as macrotidal, as its tidal range is 4 to 8 meters at the mouth of the river. During low-flow periods, this river's tidal area may extend over 1,000 km into

520-748: The ocean. This is a necessary influx for the global water balance. Rivers contribute about 95% of sediment entering the ocean. Discharge estimates from freshwater tidal rivers are important for informing water resource management and climate analyses. These discharge amounts can be estimated using tidal statistics. Some challenges to estimating discharge amounts include reversing tidal flow, compensation flow for Stokes drift, spring-neap water storage effects, lateral circulation, and multiple distributaries or ebb and flood channels. Tidal rivers face threats due to climate change and other human-caused impacts. In tidal rivers' deltas, mineral and water extraction, reduced sediment input, and floodplain engineering are causing

546-419: The open seas, with limited navigational and rescue equipment, as they do not have to withstand the high winds or large waves characteristic to large lakes, seas or oceans. They can thus be built from light composite materials. They are limited in size by width and depth of the river as well as the height of bridges spanning the river. They can be designed with shallow drafts, as were the paddle wheel steamers on

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572-466: The risk of flooding. The Rio de la Plata is a tidal river on the border between Uruguay and Argentina . It is classified as microtidal, as its tidal range is less than 1 meter. This river is significant mostly due to its size, as more than one tidal wavelength can be accommodated in this river's estuary. Similarly to most tidal rivers, saltwater does not extend far up the river, due to its large volume of freshwater discharge. The Amazon River has

598-579: The river. These early boats carried a brow (a short bridge) on the bow, so they could head in to an unimproved shore for transfer of cargo and passengers. Modern riverboats are generally screw (propeller) -driven, with pairs of diesel engines of several thousand horsepower. The standard reference for the development of the steamboat is Steamboats on Western Rivers: An Economic and Technological History by Louis C. Hunter (1949). Terrace, British Columbia , Canada, celebrates "Riverboat Days" each summer. The Skeena River passes through Terrace and played

624-452: The sinking of deltas. This, combined with rising sea levels , is causing tidal rivers to become deeper, which amplifies the tidal motion and increases the extent of salt intrusion. Increasing salinity in tidal rivers could have a detrimental impact on freshwater organisms and alter tidal river ecosystems significantly. The increasing effect of deltaic subsidence, which is due to the removal of gas, oil, and water from deltas, will also increase

650-400: The trucks transported are new and are being delivered to customers or dealers. Perhaps unique to China, the new trucks observed traveling upstream were all blue, while the new trucks traveling downstream were all white. Low-value goods are transported on rivers and canals worldwide, since slow-speed barge traffic offers the lowest possible cost per ton mile and the capital cost per ton carried

676-413: The turn of the century, in part due to the growing fish industry and the gold rush . The WT Preston , a museum ship that was once a specialised river dredge , also called a "snagboat". Some large riverboats are comparable in accommodation, food service, and entertainment to a modern oceanic cruise ship . Tourist boats provide a scenic and relaxing trip through the segment they operate in. On

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