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Geotextile Tube
A geotextile tube is a large, tube-shaped bag made of porous, weather-resistant geotextile and filled with a sand slurry, to form an artificial coastal structure such as a breakwaters, dune or levee. Geotextile tubes are a component of the living shorelines approach to coastal management. They are aligned with the shoreline to weaken wave energy and protect against coastal erosion. The tubes facilitate oyster reef development and create areas to dispose of new dredge material. Geotextile tubes are also installed for land reclamation and temporarily installed during the dewatering phase of a dredging operation. If a geotextile tube is exposed to the elements, it can be vulnerable to bursting. Notable installations * Grand Isle, Louisiana ("Burrito Levee") See also * Breakwater (structure) * Cellular confinement * Groyne References {{civil-engineering-stub Geosynthetics Coastal engineering ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Oyster Reef
The term ''oyster reef'' refers to dense aggregations of oysters that form large colonial communities. Because oyster larvae need to settle on hard substrates, new oyster reefs may form on stone or other hard marine debris. Eventually the oyster reef will propagate by spat settling on the shells of older or nonliving oysters. The dense aggregations of oysters are often referred to as an oyster reef, oyster bed, oyster bank, oyster bottom, or oyster bar interchangeably. These terms are not well defined and often regionally restricted. Degradation of oyster reefs Oyster reefs were once common in estuaries around the world. Within the last century there have been significant declines in the extent and condition of oyster reefs globally, driven by overharvesting of oysters for food provision and lime production, and coastal degradation. Boat wakes can cause oyster shells to be swept toward the shore, where they build up over time into exposed piles in which any remaining oysters ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Groyne
A groyne (in the U.S. groin) is a rigid aquatic structure built perpendicularly from an ocean shore (in coastal engineering) or a river bank, interrupting water flow and limiting the movement of sediment. It is usually made out of wood, concrete, or stone. In the ocean, groynes beach evolution, create beaches, prevent Beach#Erosion and accretion, beach erosion caused by longshore drift where this is the dominant process and facilitate beach nourishment. There is also often cross-shore movement which if longer than the groyne will limit its effectiveness. In a river, groynes slow down the process of erosion and prevent Ice jam, ice-jamming, which in turn aids navigation. All of a groyne may be underwater, in which case it is a ''submerged groyne''. They are often used in tandem with seawalls and other coastal engineering features. Groynes, however, may cause a shoreline to be perceived as unnatural. Groynes are generally straight but could be of various plan view shapes, permeable ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Cellular Confinement
Cellular confinement systems (CCS)—also known as geocells—are widely used in construction for erosion control, Mechanically stabilized earth, soil stabilization on flat ground and steep slopes, channel (geography), channel protection, and structural reinforcement for structural load, load support and earth retention. Typical cellular confinement systems are geosynthetics made with Ultrasonic welding, ultrasonically welded high-density polyethylene (HDPE) strips or novel polymeric alloy (NPA)—and expanded on-site to form a honeycomb-like structure—and filled with sand, soil, rock (geology), rock, gravel or concrete. History of cellular confinement Research and development of cellular confinement systems (CCS) began with the U.S. Army Corps of Engineers in 1975 to devise a method for building tactical roads over soft ground. Engineers found that sand-confinement systems performed better than conventional crushed stone sections and they could provide an expedient construc ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Breakwater (structure)
A breakwater is a permanent structure constructed at a coastal area to protect against tides, currents, waves, and storm surges. Breakwaters have been built since antiquity to protect anchorage (maritime), anchorages, helping isolate vessels from marine hazards such as wind-driven waves. A breakwater, also known in some contexts as a jetty or a Mole_(architecture), mole, may be connected to land or freestanding, and may contain a walkway or road for vehicle access. Part of a coastal management system, breakwaters are installed parallel to the shore to minimize erosion. On beaches where longshore drift threatens the erosion of beach material, smaller structures on the beach may be installed, usually perpendicular to the water's edge. Their action on waves and current is intended to slow the longshore drift and discourage mobilisation of beach material. In this usage they are more usually referred to as groynes. Purposes Breakwaters reduce the intensity of wave action in ins ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Grand Isle, Louisiana
Grand Isle is a town in Jefferson Parish, Louisiana, Jefferson Parish in the U.S. state of Louisiana, located on a barrier island of the same name in the Gulf of Mexico. The island is at the mouth of Barataria Bay where it meets the Gulf. The town of Grand Isle is statistically part of the New Orleans−Metairie, Louisiana, Metairie−Kenner, Louisiana, Kenner New Orleans metropolitan area, metropolitan statistical area, though it is not connected to New Orleans' continuous urbanized area. The population was 1,005 as of the 2020 United States census, 2020 U.S. census, down from 1,296 from the previous 2010 United States census, 2010 U.S. census. Grand Isle's main street is the seaside start of Louisiana Highway 1 (LA 1), which stretches away to the northwest corner of the state, ending near Shreveport, Louisiana, Shreveport. LA 1's automobile causeway at the west end of the island is the only land access to or from Grand Isle. Direct access to Grand Isle's seat of parish governm ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
The Times-Picayune
''The Times-Picayune , The New Orleans Advocate'' (commonly called ''The Times-Picayune'' or the ''T-P'') is an American newspaper published in New Orleans, Louisiana. Ancestral publications of other names date back to January 25, 1837. The current publication is the result of the 2019 acquisition of ''The Times-Picayune'' (which was the result of the 1914 union of ''The Picayune'' with the ''Times-Democrat'') by the New Orleans edition of '' The Advocate'' in Baton Rouge, Louisiana. ''The Times-Picayune'' was awarded the Pulitzer Prize for Public Service in 1997 for its coverage of threats to the world’s fisheries and in 2006 for its coverage of Hurricane Katrina. Four of ''The Times-Picayune'''s staff reporters also received Pulitzers for breaking news reporting for their storm coverage. The paper funded the Edgar A. Poe Award for journalistic excellence, which was presented annually by the White House Correspondents' Association from 1990 to 2019. History Established ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Dredging
Dredging is the excavation of material from a water environment. Possible reasons for dredging include improving existing water features; reshaping land and water features to alter drainage, navigability, and commercial use; constructing dams, dikes, and other controls for streams and shorelines; and recovering valuable mineral deposits or marine life having commercial value. In all but a few situations the excavation is undertaken by a specialist floating plant, known as a dredger. Usually the main objectives of dredging is to recover material of value, or to create a greater depth of water. Dredging systems can either be shore-based, brought to a location based on barges, or built into purpose-built vessels. Dredging can have environmental impacts: it can disturb marine sediments, creating dredge plumes which can lead to both short- and long-term water pollution, damage or destroy seabed ecosystems, and release legacy human-sourced toxins captured in the sediment. ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Dewatering
Dewatering is the removal of water from a location. This may be done by wet classification, centrifugation, filtration, or similar solid-liquid separation processes, such as removal of residual liquid from a filter cake by a filter press as part of various industrial processes. Construction dewatering, unwatering, or water control are common terms used to describe removal or draining groundwater or surface water from a riverbed, construction site, caisson, or mine shaft, by pumping or evaporation. On a construction site, this dewatering may be implemented before subsurface excavation for foundations, shoring, or cellar space to lower the water table. This frequently involves the use of submersible "dewatering" pumps, centrifugal ("trash") pumps, eductors, or application of vacuum to well points. The international business research company Visiongain valued the global dewatering pump market at $6.4 billion in 2018. Processes Deep wells A deep well typically consists of ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Land Reclamation
Land reclamation, often known as reclamation, and also known as land fill (not to be confused with a waste landfill), is the process of creating new Terrestrial ecoregion, land from oceans, list of seas, seas, Stream bed, riverbeds or lake beds. The land reclaimed is known as reclamation ground, reclaimed land, or land fill. History In ancient Egypt, the rulers of the Twelfth Dynasty of Egypt, Twelfth Dynasty (c. 2000–1800 BC) undertook a far-sighted land reclamation scheme to increase agricultural output. They constructed levees and canals to connect the Faiyum Oasis, Faiyum with the Bahr Yussef waterway, diverting water that would have flowed into Lake Moeris and causing gradual evaporation around the lake's edges, creating new farmland from the reclaimed land. A similar land reclamation system using dams and drainage canals was used in the Greek Lake Copais, Copaic Basin during the Middle Helladic period, Middle Helladic Period (c. 1900–1600 BC). Another early large-s ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Coastal Erosion
Coastal erosion is the loss or displacement of land, or the long-term removal of sediment and rocks along the coastline due to the action of Wind wave, waves, Ocean current, currents, tides, wind-driven water, waterborne ice, or other impacts of storms. The landward retreat of the shoreline can be measured and described over a temporal scale of tides, seasons, and other short-term cyclic processes. Coastal erosion may be caused by hydraulic action, abrasion (geology), abrasion, impact and corrosion by wind and water, and other forces, natural or unnatural. On non-rocky coasts, coastal erosion results in rock formations in areas where the coastline contains rock layers or fracture zones with varying resistance to erosion. Softer areas become eroded much faster than harder ones, which typically result in landforms such as tunnels, bridges, columns, and Column, pillars. Over time the coast generally evens out. The softer areas fill up with sediment eroded from hard areas, and roc ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
TLB GeoTubes
TLB may refer to: Science and technology * Adaptive transmit load balancing or balance-tlb, a Linux bonding driver mode * Canon TLb, a 35 mm camera * Translation lookaside buffer A translation lookaside buffer (TLB) is a memory CPU cache, cache that stores the recent translations of virtual memory address to a physical memory Memory_address, location. It is used to reduce the time taken to access a user memory location. It ..., a computer memory cache * Turcicum Leaf Blight, also known as Northern corn leaf blight Transport * Atlas Atlantique Airlines (ICAO airline code), France * Talybont railway station (National Rail station code), Gwynedd, Wales Other uses * Army Top Level Budget, the responsibility of the UK Deputy Chief of the General Staff * The Living Bible, a personal paraphrase of the Bible {{disambiguation ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
