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Dike (construction)
A levee ( or ), dike (American English), dyke (British English; see spelling differences), embankment, floodbank, or stop bank is an elevated ridge, natural or artificial, alongside the banks of a river, often intended to protect against flooding of the area adjoining the river. It is usually earthen and often runs parallel to the course of a river in its floodplain or along low-lying coastlines. Naturally occurring levees form on river floodplains following flooding. Sediment and alluvium are deposited on the banks and settle, forming a ridge that increases the river channel's capacity. Alternatively, levees can be artificially constructed from fill, designed to regulate water levels. In some circumstances, artificial levees can be environmentally damaging. Ancient civilizations in the Indus Valley, ancient Egypt, Mesopotamia and China all built levees. Today, levees can be found around the world, and failures of levees due to erosion or other causes can be major d ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
River Levee Cross Section Figure
A river is a natural stream of fresh water that flows on land or inside caves towards another body of water at a lower elevation, such as an ocean, lake, or another river. A river may run dry before reaching the end of its course if it runs out of water, or only flow during certain seasons. Rivers are regulated by the water cycle, the processes by which water moves around the Earth. Water first enters rivers through precipitation, whether from rainfall, the runoff of water down a slope, the melting of glaciers or snow, or seepage from aquifers beneath the surface of the Earth. Rivers flow in channeled watercourses and merge in confluences to form drainage basins, or catchments, areas where surface water eventually flows to a common outlet. Rivers have a great effect on the landscape around them. They may regularly overflow their banks and flood the surrounding area, spreading nutrients to the surrounding area. Sediment or alluvium carried by rivers shapes the landscape ar ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Federal Emergency Management Agency
The Federal Emergency Management Agency (FEMA) is an agency of the United States Department of Homeland Security (DHS), initially created under President Jimmy Carter by Presidential Reorganization Plan No. 3 of 1978 and implemented by two Executive order (United States), Executive Orders on April 1, 1979. The agency's primary purpose is to coordinate the response to a disaster that has occurred in the United States and that overwhelms the resources of local and U.S. state, state authorities. The governor of the state in which the disaster occurs must declare a state of emergency and formally request from the President of the United States, president that FEMA and the Federal government of the United States, federal government respond to the disaster. The only exception to the state's gubernatorial declaration requirement occurs when an emergency or disaster takes place on federal property or to a federal asset—for example, the 1995 Oklahoma City bombing, bombing of the Alfred ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Offa's Dyke
Offa's Dyke () is a large linear Earthworks (Archaeology), earthwork that roughly follows the England–Wales border, border between England and Wales. The structure is named after Offa of Mercia, Offa, the Anglo-Saxons, Anglo-Saxon king of Mercia from 757 to 796, who is traditionally believed to have ordered its construction. Although its original purpose is debated, it delineated the border between Angles (tribe), Anglian Mercia and the Welsh kingdom of Powys. The earthwork, which was up to wide (including its flanking ditch) and high, traversed low ground, hills and rivers. Today, it is protected as a scheduled monument. Some of its route is followed by the Offa's Dyke Path, a Long-distance trail, long-distance footpath that runs between Liverpool Bay in the north and the Severn Estuary in the south. Although the dyke has conventionally been dated to the Early Middle Ages of Anglo-Saxon England, research in recent decadesusing techniques such as radioactive carbon datingh ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Old English Language
Old English ( or , or ), or Anglo-Saxon, is the earliest recorded form of the English language, spoken in England and southern and eastern Scotland in the Early Middle Ages. It developed from the languages brought to Great Britain by Anglo-Saxon settlers in the mid-5th century, and the first Old English literature dates from the mid-7th century. After the Norman Conquest of 1066, English was replaced for several centuries by Anglo-Norman (a type of French) as the language of the upper classes. This is regarded as marking the end of the Old English era, since during the subsequent period the English language was heavily influenced by Anglo-Norman, developing into what is now known as Middle English in England and Early Scots in Scotland. Old English developed from a set of Anglo-Frisian or Ingvaeonic dialects originally spoken by Germanic tribes traditionally known as the Angles, Saxons and Jutes. As the Germanic settlers became dominant in England, their language re ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Bank (geography)
In geography, a bank is the land alongside a body of water. Different structures are referred to as ''banks'' in different fields of geography. In limnology (the study of inland waters), a stream bank or river bank is the terrain alongside the Stream bed, bed of a river, creek, or stream. The bank consists of the sides of the channel (geography), channel, between which the streamflow, flow is confined. Stream banks are of particular interest in fluvial geography, which studies the processes associated with rivers and streams and the Deposition (geology), deposits and landforms created by them. Bankfull discharge is a Discharge (hydrology), discharge great enough to fill the channel and overtop the banks. The descriptive terms ''left bank'' and ''right bank'' refer to the perspective of an observer looking current (stream), downstream; a well-known example of this being the southern Rive Gauche, left bank and the northern Rive Droite, right bank of the river Seine definin ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Trench
A trench is a type of digging, excavation or depression in the ground that is generally deeper than it is wide (as opposed to a swale (landform), swale or a bar ditch), and narrow compared with its length (as opposed to a simple hole or trapping pit, pit). In geology, trenches result from erosion by rivers or by geological movement of tectonic plates. In civil engineering, trenches are often created to install underground utilities such as Pipeline transport, gas, Water distribution system, water, Underground power lines, power and Undergrounding, communication lines. In construction, trenches are dug for foundations of buildings, retaining walls and dams, and for Tunnel construction#Cut-and-cover, cut-and-cover construction of tunnels. In archaeology, the "trench method" is used for searching and Excavation (archaeology), excavating ancient ruins or to dig into stratum, strata of sedimented material. In geotechnical engineering, trench investigations locate faults and investigat ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Common Era
Common Era (CE) and Before the Common Era (BCE) are year notations for the Gregorian calendar (and its predecessor, the Julian calendar), the world's most widely used calendar era. Common Era and Before the Common Era are alternatives to the original Anno Domini (AD) and Before Christ (BC) notations used for the same calendar era. The two notation systems are numerically equivalent: " CE" and "AD " each describe the current year; "400 BCE" and "400 BC" are the same year. The expression can be traced back to 1615, when it first appears in a book by Johannes Kepler as the (), and to 1635 in English as " Vulgar Era". The term "Common Era" can be found in English as early as 1708, and became more widely used in the mid-19th century by Jewish religious scholars. Since the late 20th century, BCE and CE have become popular in academic and scientific publications on the grounds that BCE and CE are religiously neutral terms. They have been promoted as more sensitive to non-Christia ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Batavi (Germanic Tribe)
The Batavi were an ancient Germanic tribe that lived around the modern Dutch Rhine delta in the area that the Romans called Batavia, from the second half of the first century BC to the third century AD. The name is also applied to several military units employed by the Romans that were originally raised among the Batavi. The tribal name, probably a derivation from ''batawjō'' ("good island", from Germanic ''bat-'' meaning "good, excellent", which is also in the English "better", and ''awjō'' meaning "island, land near water"), may refer to the fertile Betuwe region. Location The Batavi themselves are not mentioned by Julius Caesar in his commentary ''Commentarii de Bello Gallico'', although he is often thought to have founded his dynasty's Germanic bodyguard, which was at least in later generations dominated by Batavi. But he did mention the "Batavian island" in the Rhine river. The island's easternmost point is at a split in the Rhine, one arm being the Waal the other ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Tacitus
Publius Cornelius Tacitus, known simply as Tacitus ( , ; – ), was a Roman historian and politician. Tacitus is widely regarded as one of the greatest Roman historians by modern scholars. Tacitus’ two major historical works, ''Annals'' (Latin: ) and the ''Histories'' (Latin: ), originally formed a continuous narrative of the Roman Empire from the death of Augustus (14 AD) to the end of Domitian’s reign (96 AD). The surviving portions of the Annals focus on the reigns of Tiberius, Claudius, Nero, and those who reigned in the Year of the Four Emperors (69 AD). Tacitus's other writings discuss oratory (in dialogue format, see ), Germania (in ''De origine et situ Germanorum''), and the life of his father-in-law, Agricola (the general responsible for much of the Roman conquest of Britain), mainly focusing on his campaign in Britannia ('' De vita et moribus Iulii Agricolae''). Tacitus's ''Histories'' offers insights into Roman attitudes towards Jews, ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Westfriese Omringdijk
The Westfriese Omringdijk (West-Frisian Circular Dyke) is a dyke system that protected the region of Westflinge, part of the historical region of West-Frisia. Westflinge is now commonly referred to as West-Frisia as the rest of historical West-Frisia assimilated with The Netherlands. The cultivation of peat bogs and moors as of 1000 BC led to subsidence, which necessitated the building of dykes. The Westfriese Omringdijk was formed by connecting a large number of smaller dykes. This was completed by 1250 AD, just in time for the area to be spared annihilation in the St. Lucia's flood of 1287. The total dyke length is about 126 km, protecting an area of about 800 km2. It connects the cities of Enkhuizen, Hoorn, Alkmaar, Schagen Schagen () is a city and municipality in the northwestern Netherlands. It is located between Alkmaar and Den Helder, in the region of West Friesland (region), West Friesland and the province of North Holland. It received City rights in the ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Dutch Language
Dutch ( ) is a West Germanic languages, West Germanic language of the Indo-European language family, spoken by about 25 million people as a first language and 5 million as a second language and is the List of languages by total number of speakers, third most spoken Germanic language. In Europe, Dutch is the native language of most of the population of the Netherlands and Flanders (which includes 60% of the population of Belgium). "1% of the EU population claims to speak Dutch well enough in order to have a conversation." (page 153). Dutch was one of the official languages of South Africa until 1925, when it was replaced by Afrikaans, a separate but partially Mutual intelligibility, mutually intelligible daughter language of Dutch. Afrikaans, depending on the definition used, may be considered a sister language, spoken, to some degree, by at least 16 million people, mainly in South Africa and Namibia, and evolving from Cape Dutch dialects. In South America, Dutch is the native l ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
New Orleans
New Orleans (commonly known as NOLA or The Big Easy among other nicknames) is a Consolidated city-county, consolidated city-parish located along the Mississippi River in the U.S. state of Louisiana. With a population of 383,997 at the 2020 United States census, 2020 census, it is the List of municipalities in Louisiana, most populous city in Louisiana and the French Louisiana region, the second-most populous in the Deep South, and the twelfth-most populous in the Southeastern United States. The city is coextensive with Orleans Parish, Louisiana, Orleans Parish. New Orleans serves as a major port and a commercial hub for the broader Gulf Coast of the United States, Gulf Coast region. The New Orleans metropolitan area has a population of approximately 1 million, making it the most populous metropolitan area in Louisiana and the List of metropolitan statistical areas, 59th-most populous in the United States. New Orleans is world-renowned for Music of New Orleans, its distincti ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
