122-547: Chef Menteur is associated with several place names in eastern New Orleans and South Louisiana , including Chef Menteur Pass , Bayou Chef Menteur and Chef Menteur Highway (U.S. Highway 90 in Louisiana). Proposed etymologies for the phrase have varied, and the origin was obscure as early as the late nineteenth century. The literal meaning of "Chef Menteur" is "Lying chief" in the French language ; most etymologies describe
244-449: A dam , landslide, or glacier . In one instance, a flash flood killed eight people enjoying the water on a Sunday afternoon at a popular waterfall in a narrow canyon. Without any observed rainfall, the flow rate increased from about 50 to 1,500 cubic feet per second (1.4 to 42 m /s) in just one minute. Two larger floods occurred at the same site within a week, but no one was at the waterfall on those days. The deadly flood resulted from
366-646: A flash flood . Flash floods usually result from intense rainfall over a relatively small area, or if the area was already saturated from previous precipitation. The amount, location, and timing of water reaching a drainage channel from natural precipitation and controlled or uncontrolled reservoir releases determines the flow at downstream locations. Some precipitation evaporates, some slowly percolates through soil, some may be temporarily sequestered as snow or ice, and some may produce rapid runoff from surfaces including rock, pavement, roofs, and saturated or frozen ground. The fraction of incident precipitation promptly reaching
488-515: A landslide , earthquake or volcanic eruption . Examples include outburst floods and lahars . Tsunamis can cause catastrophic coastal flooding , most commonly resulting from undersea earthquakes. The primary effects of flooding include loss of life and damage to buildings and other structures, including bridges, sewerage systems, roadways, and canals. The economic impacts caused by flooding can be severe. Every year flooding causes countries billions of dollars worth of damage that threatens
610-484: A tropical cyclone or an extratropical cyclone , falls within this category. A storm surge is "an additional rise of water generated by a storm, over and above the predicted astronomical tides". Due to the effects of climate change (e.g. sea level rise and an increase in extreme weather events) and an increase in the population living in coastal areas, the damage caused by coastal flood events has intensified and more people are being affected. Flooding in estuaries
732-590: A "per capita income [that] was second in the nation and the highest in the South." The city had a role as the "primary commercial gateway for the nation's booming midsection." The port was the nation's third largest in terms of tonnage of imported goods, after Boston and New York, handling 659,000 tons in 1859. As the Creole elite feared, the American Civil War changed their world. In April 1862, following
854-1096: A brief period as Republican governor of Louisiana, becoming the first governor of African descent of a U.S. state (the next African American to serve as governor of a U.S. state was Douglas Wilder , elected in Virginia in 1989). New Orleans operated a racially integrated public school system during this period. Wartime damage to levees and cities along the Mississippi River adversely affected southern crops and trade. The federal government contributed to restoring infrastructure. The nationwide financial recession and Panic of 1873 adversely affected businesses and slowed economic recovery. From 1868, elections in Louisiana were marked by violence, as white insurgents tried to suppress black voting and disrupt Republican Party gatherings. The disputed 1872 gubernatorial election resulted in conflicts that ran for years. The " White League ", an insurgent paramilitary group that supported
976-636: A complex system of levees and drainage pumps in an effort to protect the city. New Orleans was severely affected by Hurricane Katrina in late August 2005, which flooded more than 80% of the city, killed more than 1,800 people, and displaced thousands of residents, causing a population decline of over 50%. Since Katrina, major redevelopment efforts have led to a rebound in the city's population. Concerns have been expressed about gentrification , new residents buying property in formerly close-knit communities, and displacement of longtime residents. Additionally, high rates of violent crime continue to plague
1098-611: A concern into the 1740s for governor Marquis de Vaudreuil . In the early 1740s traders from the Thirteen Colonies crossed into the Appalachian Mountains. The Native American tribes would now operate dependent on which of various European colonists would most benefit them. Several of these tribes and especially the Chickasaw and Choctaw would trade goods and gifts for their loyalty. The economic issue in
1220-468: A country can be lost in extreme flood circumstances. Some tree species may not survive prolonged flooding of their root systems. Flooding in areas where people live also has significant economic implications for affected neighborhoods. In the United States , industry experts estimate that wet basements can lower property values by 10–25 percent and are cited among the top reasons for not purchasing
1342-538: A drainage channel has been observed from nil for light rain on dry, level ground to as high as 170 percent for warm rain on accumulated snow. Most precipitation records are based on a measured depth of water received within a fixed time interval. Frequency of a precipitation threshold of interest may be determined from the number of measurements exceeding that threshold value within the total time period for which observations are available. Individual data points are converted to intensity by dividing each measured depth by
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#17327720004711464-627: A few minutes for roof and parking lot drainage structures, while cumulative rainfall over several days would be critical for river basins. Water flowing downhill ultimately encounters downstream conditions slowing movement. The final limitation in coastal flooding lands is often the ocean or some coastal flooding bars which form natural lakes . In flooding low lands, elevation changes such as tidal fluctuations are significant determinants of coastal and estuarine flooding. Less predictable events like tsunamis and storm surges may also cause elevation changes in large bodies of water. Elevation of flowing water
1586-605: A few. Gastrointestinal disease and diarrheal diseases are very common due to a lack of clean water during a flood. Most of clean water supplies are contaminated when flooding occurs. Hepatitis A and E are common because of the lack of sanitation in the water and in living quarters depending on where the flood is and how prepared the community is for a flood. When floods hit, people lose nearly all their crops, livestock, and food reserves and face starvation. Floods also frequently damage power transmission and sometimes power generation , which then has knock-on effects caused by
1708-728: A home. According to the U.S. Federal Emergency Management Agency (FEMA), almost 40 percent of small businesses never reopen their doors following a flooding disaster. In the United States, insurance is available against flood damage to both homes and businesses. Economic hardship due to a temporary decline in tourism, rebuilding costs, or food shortages leading to price increases is a common after-effect of severe flooding. The impact on those affected may cause psychological damage to those affected, in particular where deaths, serious injuries and loss of property occur. Fatalities connected directly to floods are usually caused by drowning ;
1830-830: A large contingent of Tennessee state militia, Kentucky frontiersmen and local privateers (the latter led by the pirate Jean Lafitte ), to decisively defeat the British , led by Sir Edward Pakenham , in the Battle of New Orleans on January 8, 1815. The armies had not learned of the Treaty of Ghent , which had been signed on December 24, 1814 (however, the treaty did not call for cessation of hostilities until after both governments had ratified it. The U.S. government ratified it on February 16, 1815). The fighting in Louisiana began in December 1814 and did not end until late January, after
1952-486: A more distant point controls at higher water levels. Effective flood channel geometry may be changed by growth of vegetation, accumulation of ice or debris, or construction of bridges, buildings, or levees within the flood channel. Periodic floods occur on many rivers, forming a surrounding region known as the flood plain . Even when rainfall is relatively light, the shorelines of lakes and bays can be flooded by severe winds—such as during hurricanes —that blow water into
2074-564: A series of public meetings during 1765 to keep the populace in opposition of the establishment of Spanish rule. Anti-Spanish passions in New Orleans reached their highest level after two years of Spanish administration in Louisiana. On October 27, 1768, a mob of local residents, spiked the guns guarding New Orleans and took control of the city from the Spanish . The rebellion organized a group to sail for Paris, where it met with officials of
2196-413: A thunderstorm over part of the drainage basin, where steep, bare rock slopes are common and the thin soil was already saturated. Flash floods are the most common flood type in normally-dry channels in arid zones, known as arroyos in the southwest United States and many other names elsewhere. In that setting, the first flood water to arrive is depleted as it wets the sandy stream bed. The leading edge of
2318-520: A type of hybrid river/areal flooding can occur, known locally as "overland flooding". This is different from "overland flow" defined as "surface runoff". The Red River Valley is a former glacial lakebed, created by Lake Agassiz , and over a length of 550 mi (890 km), the river course drops only 236 ft (72 m), for an average slope of about 5 inches per mile (or 8.2 cm per kilometer). In this very large area, spring snowmelt happens at different rates in different places, and if winter snowfall
2440-405: Is also the intentional flooding of land that would otherwise remain dry. This may take place for agricultural, military, or river-management purposes. For example, agricultural flooding may occur in preparing paddy fields for the growing of semi-aquatic rice in many countries. Flooding may occur as an overflow of water from water bodies, such as a river , lake , sea or ocean. In these cases,
2562-419: Is common when heavy flows move uprooted woody vegetation and flood-damaged structures and vehicles, including boats and railway equipment. Recent field measurements during the 2010–11 Queensland floods showed that any criterion solely based upon the flow velocity, water depth or specific momentum cannot account for the hazards caused by velocity and water depth fluctuations. These considerations ignore further
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#17327720004712684-493: Is commonly caused by a combination of storm surges caused by winds and low barometric pressure and large waves meeting high upstream river flows. The intentional flooding of land that would otherwise remain dry may take place for agricultural, military or river-management purposes. This is a form of hydraulic engineering . Agricultural flooding may occur in preparing paddy fields for the growing of semi-aquatic rice in many countries. Flooding for river management may occur in
2806-400: Is controlled by the geometry of the flow channel and, especially, by depth of channel, speed of flow and amount of sediments in it Flow channel restrictions like bridges and canyons tend to control water elevation above the restriction. The actual control point for any given reach of the drainage may change with changing water elevation, so a closer point may control for lower water levels until
2928-461: Is more significant to flooding within small drainage basins. The most important upslope factor in determining flood magnitude is the land area of the watershed upstream of the area of interest. Rainfall intensity is the second most important factor for watersheds of less than approximately 30 square miles or 80 square kilometres. The main channel slope is the second most important factor for larger watersheds. Channel slope and rainfall intensity become
3050-572: Is named after the Roman emperor Aurelian , originally being known as Aurelianum. Thus, by extension, since New Orleans is also named after Aurelian, its name in Latin would translate to Nova Aurelia. Following the defeat in the Seven Years' War , France formally transferred the possession of Louisiana to Spain , with which France had secretly signed the Treaty of Fontainebleau a year earlier, in
3172-583: Is usually dry. In the sense of "flowing water", the word may also be applied to the inflow of the tide . Floods are of significant concern in agriculture , civil engineering and public health . Human changes to the environment often increase the intensity and frequency of flooding. Examples for human changes are land use changes such as deforestation and removal of wetlands , changes in waterway course or flood controls such as with levees . Global environmental issues also influence causes of floods, namely climate change which causes an intensification of
3294-576: The Company of the Indies , founded a convent in the city in 1727. At the end of the colonial era, the Ursuline Academy maintained a house of 70 boarding and 100 day students. Today numerous schools in New Orleans can trace their lineage from this academy. Another notable example is the street plan and architecture still distinguishing New Orleans today. French Louisiana had early architects in
3416-481: The Deep South ; and the twelfth-most populous city in the southeastern United States . Serving as a major port , New Orleans is considered an economic and commercial hub for the broader Gulf Coast region of the United States . New Orleans is world-renowned for its distinctive music , Creole cuisine , unique dialects , and its annual celebrations and festivals, most notably Mardi Gras . The historic heart of
3538-649: The Democratic Party , was organized in 1874 and operated in the open, violently suppressing the black vote and running off Republican officeholders. In 1874, in the Battle of Liberty Place , 5,000 members of the White League fought with city police to take over the state offices for the Democratic candidate for governor, holding them for three days. By 1876, such tactics resulted in the white Democrats ,
3660-559: The Gallic community would have become a minority of the total population as early as 1820. After the Louisiana Purchase, numerous Anglo-Americans migrated to the city. The population doubled in the 1830s and by 1840, New Orleans had become the nation's wealthiest and the third-most populous city, after New York and Baltimore . German and Irish immigrants began arriving in the 1840s, working as port laborers. In this period,
3782-627: The Haitian Revolution , both whites and free people of color ( affranchis or gens de couleur libres ), arrived in New Orleans; a number brought their slaves with them, many of whom were native Africans or of full-blood descent. While Governor Claiborne and other officials wanted to keep out additional free black people, the French Creoles wanted to increase the French-speaking population. In addition to bolstering
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3904-501: The Mississippi River and that the use of the same name for the settlement relates to Native American concepts of the close interaction between rivers and their surrounding land. The name of New Orleans derives from the original French name, La Nouvelle-Orléans , which was given to the city in honor of Philippe II, Duke of Orléans , who served as Louis XV 's regent from 1715 to 1723. The French city of Orléans itself
4026-464: The New Orleans streetcar strike during which serious unrest occurred. It is also credited for the creation of the distinctly Louisianan Po' boy sandwich. By the mid-20th century, New Orleanians recognized that their city was no longer the leading urban area in the South. By 1950, Houston , Dallas , and Atlanta exceeded New Orleans in size, and in 1960 Miami eclipsed New Orleans, even as
4148-562: The Second World War ). Floods are caused by many factors or a combination of any of these generally prolonged heavy rainfall (locally concentrated or throughout a catchment area), highly accelerated snowmelt , severe winds over water, unusual high tides, tsunamis , or failure of dams, levees , retention ponds , or other structures that retained the water. Flooding can be exacerbated by increased amounts of impervious surface or by other natural hazards such as wildfires, which reduce
4270-484: The Treaty of Paris of 1763. The Spanish renamed the city Nueva Orleans ( pronounced [ˌnweβa oɾleˈans] ), which was used until 1800. The United States, which had acquired possession from France in 1803, adopted the French name and anglicized it to New Orleans . New Orleans has several nicknames, including these: La Nouvelle-Orléans (New Orleans) was founded in the spring of 1718 (May 7 has become
4392-420: The port remained one of the nation's largest, automation and containerization cost many jobs. The city's former role as banker to the South was supplanted by larger peer cities. New Orleans' economy had always been based more on trade and financial services than on manufacturing, but the city's relatively small manufacturing sector also shrank after World War II. Despite some economic development successes under
4514-562: The water table is shallow, such as a floodplain , or from intense rain from one or a series of storms . Infiltration also is slow to negligible through frozen ground, rock, concrete , paving, or roofs. Areal flooding begins in flat areas like floodplains and in local depressions not connected to a stream channel, because the velocity of overland flow depends on the surface slope. Endorheic basins may experience areal flooding during periods when precipitation exceeds evaporation. Floods occur in all types of river and stream channels, from
4636-737: The Americans held off the Royal Navy during a ten-day siege of Fort St. Philip (the Royal Navy went on to capture Fort Bowyer near Mobile , before the commanders received news of the peace treaty). As a port , New Orleans played a major role during the antebellum period in the Atlantic slave trade . The port handled commodities for export from the interior and imported goods from other countries, which were warehoused and transferred in New Orleans to smaller vessels and distributed along
4758-519: The Atlantic world. Its inhabitants traded across the French commercial system. New Orleans was a hub for this trade both physically and culturally because it served as the exit point to the rest of the globe for the interior of the North American continent. In one instance the French government established a chapter house of sisters in New Orleans. The Ursuline sisters after being sponsored by
4880-523: The Civil War, fought against Jim Crow. They organized the Comité des Citoyens (Citizens Committee) to work for civil rights. As part of their legal campaign, they recruited one of their own, Homer Plessy , to test whether Louisiana's newly enacted Separate Car Act was constitutional. Plessy boarded a commuter train departing New Orleans for Covington, Louisiana , sat in the car reserved for whites only, and
5002-616: The Confederate cause, his order warned that such future occurrences would result in his men treating such women as those "plying their avocation in the streets", implying that they would treat the women like prostitutes. Accounts of this spread widely. He also came to be called "Spoons" Butler because of the alleged looting that his troops did while occupying the city, during which time he himself supposedly pilfered silver flatware. Significantly, Butler abolished French-language instruction in city schools. Statewide measures in 1864 and, after
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5124-648: The French government. This group brought with them a long memorial to summarize the abuses the colony had endured from the Spanish. King Louis XV and his ministers reaffirmed Spain's sovereignty over Louisiana. Nearly all of the surviving 18th-century architecture of the Vieux Carré ( French Quarter ) dates from the Spanish period, notably excepting the Old Ursuline Convent . During the American Revolutionary War , New Orleans
5246-504: The Mississippi River watershed. The river was filled with steamboats, flatboats and sailing ships. Despite its role in the slave trade , New Orleans at the time also had the largest and most prosperous community of free persons of color in the nation, who were often educated, middle-class property owners. Dwarfing the other cities in the Antebellum South, New Orleans had the U.S.' largest slave market. The market expanded after
5368-568: The United States ended the international trade in 1808. Two-thirds of the more than one million slaves brought to the Deep South arrived via forced migration in the domestic slave trade. The money generated by the sale of slaves in the Upper South has been estimated at 15 percent of the value of the staple crop economy. The slaves were collectively valued at half a billion dollars. The trade spawned an ancillary economy—transportation, housing and clothing, fees, etc., estimated at 13.5 percent of
5490-471: The United States in the Louisiana Purchase in 1803. Thereafter, the city grew rapidly with influxes of Americans, French , Creoles and Africans . Later immigrants were Irish , Germans , Poles and Italians . Major commodity crops of sugar and cotton were cultivated with slave labor on nearby large plantations . Between 1791 and 1810, thousands of St. Dominican refugees from
5612-423: The United States. Before the arrival of European colonists, the indigenous Choctaw people called the area of present-day New Orleans Bulbancha , which translates as "land of many tongues". It appears to have been a contraction of balbáha a̱shah , which means "there are foreign speakers". In his book Histoire de la Louisiane , Antoine-Simon Le Page du Pratz wrote that the indigenous name referred to
5734-404: The United States. The rate of lynchings of black men was high across the South, as other states also disfranchised blacks and sought to impose Jim Crow. Nativist prejudices also surfaced. Anti-Italian sentiment in 1891 contributed to the lynchings of 11 Italians , some of whom had been acquitted of the murder of the police chief. Some were shot and killed in the jail where they were detained. It
5856-670: The administrations of DeLesseps "Chep" Morrison (1946–1961) and Victor "Vic" Schiro (1961–1970), metropolitan New Orleans' growth rate consistently lagged behind more vigorous cities. During the later years of Morrison's administration, and for the entirety of Schiro's, the city was a center of the Civil Rights movement . The Southern Christian Leadership Conference was founded in New Orleans, and lunch counter sit-ins were held in Canal Street department stores. A prominent and violent series of confrontations occurred in 1960 when
5978-717: The adverse ecological impact of the inundation. That impact may also be adverse in a hydrogeological sense if the inundation lasts a long time. Examples for uncontrolled inundations are the second Siege of Leiden during the first part of the Eighty Years' War , the flooding of the Yser plain during the First World War , and the Inundation of Walcheren , and the Inundation of the Wieringermeer during
6100-423: The amount of water damage and mold that grows after an incident. Research suggests that there will be an increase of 30–50% in adverse respiratory health outcomes caused by dampness and mold exposure for those living in coastal and wetland areas. Fungal contamination in homes is associated with increased allergic rhinitis and asthma. Vector borne diseases increase as well due to the increase in still water after
6222-463: The antebellum period. It was the nation's fifth-largest city in 1860 (after New York, Philadelphia , Boston and Baltimore) and was significantly larger than all other southern cities. From the mid-19th century onward rapid economic growth shifted to other areas, while New Orleans' relative importance steadily declined. The growth of railways and highways decreased river traffic, diverting goods to other transportation corridors and markets. Thousands of
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#17327720004716344-487: The appellation of Chef Menteur, or "Lying Chief". More modern accounts describe the term as referring either to Kerlerec or the Mississippi River . In the case of the former, the name originates after the French Empire , represented by Kerlerec, reneged on a treaty. In the case of the latter, "lying" is used metaphorically, to describe the twisting and turning of the unregulated and unstable river's path through
6466-470: The authority of the " Fifth Military District " of the United States during Reconstruction. Louisiana was readmitted to the Union in 1868. Its Constitution of 1868 granted universal male suffrage and established universal public education . Both blacks and whites were elected to local and state offices. In 1872, lieutenant governor P.B.S. Pinchback , who was of mixed race , succeeded Henry Clay Warmouth for
6588-681: The city attempted school desegregation, following the Supreme Court ruling in Brown v. Board of Education (1954). When six-year-old Ruby Bridges integrated William Frantz Elementary School in the Ninth Ward , she was the first child of color to attend a previously all-white school in the South. Much controversy preceded the 1956 Sugar Bowl at Tulane Stadium , when the Pitt Panthers , with African-American fullback Bobby Grier on
6710-539: The city is the French Quarter , known for its French and Spanish Creole architecture and vibrant nightlife along Bourbon Street . The city has been described as the "most unique" in the United States, owing in large part to its cross-cultural and multilingual heritage. Additionally, New Orleans has increasingly been known as "Hollywood South" due to its prominent role in the film industry and in pop culture. Founded in 1718 by French colonists, New Orleans
6832-465: The city volunteered for the first regiments of Black troops in the War. Led by Brigadier General Daniel Ullman (1810–1892), of the 78th Regiment of New York State Volunteers Militia, they were known as the " Corps d'Afrique ". While that name had been used by a militia before the war, that group was composed of free people of color . The new group was made up mostly of former slaves. They were supplemented in
6954-449: The city with New Orleans experiencing 280 murders in 2022, resulting in the highest per capita homicide rate in the United States. The city and Orleans Parish ( French : paroisse d'Orléans ) are coterminous . As of 2017, Orleans Parish is the third most populous parish in Louisiana, behind East Baton Rouge Parish and neighboring Jefferson Parish . The city and parish are bounded by St. Tammany Parish and Lake Pontchartrain to
7076-515: The city's expansion. The most ambitious development during this period was a drainage plan devised by engineer and inventor A. Baldwin Wood , designed to break the surrounding swamp's stranglehold on the city's geographic expansion. Until then, urban development in New Orleans was largely limited to higher ground along the natural river levees and bayous . Flood A flood is an overflow of water ( or rarely other fluids ) that submerges land that
7198-539: The city's occupation by the Union Navy after the Battle of Forts Jackson and St. Philip , Gen. Benjamin F. Butler – a respected Massachusetts lawyer serving in that state's militia – was appointed military governor. New Orleans residents supportive of the Confederacy nicknamed him "Beast" Butler, because of an order he issued. After his troops had been assaulted and harassed in the streets by women still loyal to
7320-511: The city's population. The city became 63 percent black, a greater proportion than Charleston, South Carolina 's 53 percent at that time. On January 8-11, 1811, about 500 enslaved Africans in St. Charles and St. John the Baptist parishes rose up in rebellion against their enslavers, killing two white men in the process. They proceeded to march south toward New Orleans and were eventually controlled by
7442-526: The colony, which continued under Vaudreuil, resulted in many raids by Native American tribes, taking advantage of the French weakness. In 1747 and 1748, the Chickasaw would raid along the east bank of the Mississippi all the way south to Baton Rouge . These raids would often force residents of French Louisiana to take refuge in New Orleans proper. Inability to find labor was the most pressing issue in
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#17327720004717564-630: The competing interests of France, Spain, and England, as well as traditional rivals. Notably, the Natchez , whose traditional lands were along the Mississippi near the modern city of Natchez, Mississippi , had a series of wars culminating in the Natchez Revolt that began in 1729 with the Natchez overrunning Fort Rosalie . Approximately 230 French colonists were killed and the Natchez settlement destroyed, causing fear and concern in New Orleans and
7686-434: The deadliest floods worldwide, showing events with death tolls at or above 100,000 individuals. Floods (in particular more frequent or smaller floods) can also bring many benefits, such as recharging ground water , making soil more fertile and increasing nutrients in some soils. Flood waters provide much needed water resources in arid and semi-arid regions where precipitation can be very unevenly distributed throughout
7808-494: The delta . New Orleans New Orleans (commonly known as NOLA or The Big Easy among other nicknames) is a consolidated city-parish located along the Mississippi River in the southeastern region of the U.S. state of Louisiana . With a population of 383,997 according to the 2020 U.S. census, it is the most populous city in Louisiana and the French Louisiana region; the third-most populous city in
7930-415: The early 20th century when medical and scientific advances ameliorated the situation, the city suffered repeated epidemics of yellow fever and other tropical and infectious diseases . In the first half of the 19th century, yellow fever epidemics killed over 150,000 people in New Orleans. After growing by 45 percent in the 1850s, by 1860, the city had nearly 170,000 people. It had grown in wealth, with
8052-502: The end of the 1960s, a large gap in income levels and educational attainment persisted between the city's White and African American communities. As the middle class and wealthier members of both races left the center city, its population's income level dropped, and it became proportionately more African American. From 1980, the African American majority elected primarily officials from its own community. They struggled to narrow
8174-576: The field that is intended to impede the movement of the enemy. This may be done both for offensive and defensive purposes. Furthermore, in so far as the methods used are a form of hydraulic engineering, it may be useful to differentiate between controlled inundations and uncontrolled ones. Examples for controlled inundations include those in the Netherlands under the Dutch Republic and its successor states in that area and exemplified in
8296-470: The flood process; before, during and after. During floods accidents occur with falling debris or any of the many fast moving objects in the water. After the flood rescue attempts are where large numbers injuries can occur. Communicable diseases are increased due to many pathogens and bacteria that are being transported by the water .There are many waterborne diseases such as cholera , hepatitis A , hepatitis E and diarrheal diseases , to mention
8418-492: The flood thus advances more slowly than later and higher flows. As a result, the rising limb of the hydrograph becomes ever quicker as the flood moves downstream, until the flow rate is so great that the depletion by wetting soil becomes insignificant. Coastal areas may be flooded by storm surges combining with high tides and large wave events at sea, resulting in waves over-topping flood defenses or in severe cases by tsunami or tropical cyclones. A storm surge , from either
8540-403: The floods have settled. The diseases that are vector borne are malaria , dengue , West Nile , and yellow fever . Floods have a huge impact on victims' psychosocial integrity . People suffer from a wide variety of losses and stress . One of the most treated illness in long-term health problems are depression caused by the flood and all the tragedy that flows with one. Below is a list of
8662-428: The flow rate exceeds the capacity of the river channel , particularly at bends or meanders in the waterway . Floods often cause damage to homes and businesses if these buildings are in the natural flood plains of rivers. People could avoid riverine flood damage by moving away from rivers. However, people in many countries have traditionally lived and worked by rivers because the land is usually flat and fertile . Also,
8784-466: The foreign trends as well. The French colony of Louisiana was ceded to the Spanish Empire in the 1763 Treaty of Paris , following France's defeat by Great Britain in the Seven Years' War . After the French relinquished West Louisiana to the Spanish, New Orleans merchants attempted to ignore Spanish rule and even re-institute French control on the colony. The citizens of New Orleans held
8906-656: The form of diverting flood waters in a river at flood stage upstream from areas that are considered more valuable than the areas that are sacrificed in this way. This may be done ad hoc , or permanently, as in the so-called overlaten (literally "let-overs"), an intentionally lowered segment in Dutch riparian levees, like the Beerse Overlaat in the left levee of the Meuse between the villages of Gassel and Linden, North Brabant . Military inundation creates an obstacle in
9028-471: The free people of color as mulatto , a term used to cover all degrees of mixed race. Mostly part of the Francophone group, they constituted the artisan, educated and professional class of African Americans. The mass of blacks were still enslaved, working at the port, in domestic service, in crafts, and mostly on the many large, surrounding sugarcane plantations. Throughout New Orleans' history, until
9150-405: The gap by creating conditions conducive to the economic uplift of the African American community. New Orleans became increasingly dependent on tourism as an economic mainstay during the administrations of Sidney Barthelemy (1986–1994) and Marc Morial (1994–2002). Relatively low levels of educational attainment, high rates of household poverty, and rising crime threatened the city's prosperity in
9272-595: The institutionalizing of laws governing slavery within the colony. These laws required that slaves be baptized in the Roman Catholic faith, slaves be married in the church; the slave law formed in the 1720s is known as the Code Noir , which would bleed into the antebellum period of the American South as well. Louisiana slave culture had its own distinct Afro-Creole society that called on past cultures and
9394-403: The land in quantities that cannot be carried within stream channels or retained in natural ponds, lakes, and human-made reservoirs . About 30 percent of all precipitation becomes runoff and that amount might be increased by water from melting snow. River flooding is often caused by heavy rain, sometimes increased by melting snow. A flood that rises rapidly, with little or no warning, is called
9516-726: The last two years of the War by newly organized United States Colored Troops , who played an increasingly important part in the war. Violence throughout the South, especially the Memphis Riots of 1866 followed by the New Orleans Riot in the same year, led Congress to pass the Reconstruction Act and the Fourteenth Amendment , extending the protections of full citizenship to freedmen and free people of color. Louisiana and Texas were put under
9638-475: The later decades of the century. The negative effects of these socioeconomic conditions aligned poorly with the changes in the late-20th century to the economy of the United States, which reflected a post-industrial, knowledge-based paradigm in which mental skills and education were more important to advancement than manual skills. In the 20th century, New Orleans' government and business leaders believed they needed to drain and develop outlying areas to provide for
9760-459: The latter's population reached its historic peak. As with other older American cities, highway construction and suburban development drew residents from the center city to newer housing outside. The 1970 census recorded the first absolute decline in population since the city became part of the United States in 1803. The Greater New Orleans metropolitan area continued expanding in population, albeit more slowly than other major Sun Belt cities. While
9882-616: The legislature passed a constitutional amendment incorporating a " grandfather clause " that effectively disfranchised freedmen as well as the propertied people of color manumitted before the war. Unable to vote, African Americans could not serve on juries or in local office, and were closed out of formal politics for generations. The Southern U.S. was ruled by a white Democratic Party. Public schools were racially segregated and remained so until 1960. New Orleans' large community of well-educated, often French-speaking free persons of color ( gens de couleur libres ), who had been free prior to
10004-614: The livelihood of individuals. As a result, there is also significant socio-economic threats to vulnerable populations around the world from flooding. For example, in Bangladesh in 2007, a flood was responsible for the destruction of more than one million houses. And yearly in the United States, floods cause over $ 7 billion in damage. Flood waters typically inundate farm land, making the land unworkable and preventing crops from being planted or harvested, which can lead to shortages of food both for humans and farm animals. Entire harvests for
10126-601: The local militia, with numerous casualties on both sides. The uprising has been called the "largest slave rebellion in US history." During the final campaign of the War of 1812 , the British sent a force of 11,000 in an attempt to capture New Orleans. Despite great challenges, General Andrew Jackson , with support from the U.S. Navy , successfully cobbled together a force of militia from Louisiana and Mississippi , U.S. Army regulars,
10248-417: The location of the flood. Damage to roads and transport infrastructure may make it difficult to mobilize aid to those affected or to provide emergency health treatment. Flooding can cause chronically wet houses, leading to the growth of indoor mold and resulting in adverse health effects, particularly respiratory symptoms. Respiratory diseases are a common after the disaster has occurred. This depends on
10370-436: The loss of power. This includes loss of drinking water treatment and water supply, which may result in loss of drinking water or severe water contamination. It may also cause the loss of sewage disposal facilities. Lack of clean water combined with human sewage in the flood waters raises the risk of waterborne diseases , which can include typhoid , giardia , cryptosporidium , cholera and many other diseases depending upon
10492-520: The most ambitious people of color left the state in the Great Migration around World War II and after, many for West Coast destinations. From the late 1800s, most censuses recorded New Orleans slipping down the ranks in the list of largest American cities (New Orleans' population still continued to increase throughout the period, but at a slower rate than before the Civil War). In 1929
10614-419: The north, St. Bernard Parish and Lake Borgne to the east, Plaquemines Parish to the south, and Jefferson Parish to the south and west. The city anchors the larger Greater New Orleans metropolitan area , which had a population of 1,271,845 in 2020. Greater New Orleans is the most populous metropolitan statistical area (MSA) in Louisiana and, since the 2020 census, has been the 46th most populous MSA in
10736-503: The now parish of Orleans, back of Gentilly, there is a tract of land in the shape of an isthmus, projecting itself into Lake Pontchartrain, not far from the Rigolets, and terminating in what is called "pointe aux herbes", or Herb Point. It was there that the exiled Choctaw chief retired with his family and a few adherents, near a bayou which discharges itself into the lake. From this circumstance this tract of land received, and still retains
10858-457: The period of time between observations. This intensity will be less than the actual peak intensity if the duration of the rainfall event was less than the fixed time interval for which measurements are reported. Convective precipitation events (thunderstorms) tend to produce shorter duration storm events than orographic precipitation. Duration, intensity, and frequency of rainfall events are important to flood prediction. Short duration precipitation
10980-510: The phrase as originating amongst the Choctaw , in whose language the equivalent is "oulabe mingo." One book from 1891 describes the origin as follows: What the Choctaws were most conspicuous for was their hatred of falsehood and their love of truth. Tradition relates that one of their chiefs became so addicted to the vice of lying that in disgust they drove him away from their territory. In
11102-490: The price per person, amounting to tens of billions of dollars (2005 dollars, adjusted for inflation) during the antebellum period, with New Orleans as a prime beneficiary. According to historian Paul Lachance, the addition of white immigrants [from Saint-Domingue] to the white creole population enabled French-speakers to remain a majority of the white population until almost 1830. If a substantial proportion of free persons of color and slaves had not also spoken French, however,
11224-676: The province who were trained as military engineers and were now assigned to design government buildings. Pierre Le Blond de Tour and Adrien de Pauger , for example, planned many early fortifications, along with the street plan for the city of New Orleans. After them in the 1740s, Ignace François Broutin, as engineer-in-chief of Louisiana, reworked the architecture of New Orleans with an extensive public works program. French policy-makers in Paris attempted to set political and economic norms for New Orleans. The city acted autonomously in much of its cultural and physical aspects, but stayed in communication with
11346-547: The request and threatened to resign. The game went on as planned. The Civil Rights movement's success in gaining federal passage of the Civil Rights Act of 1964 and the Voting Rights Act of 1965 renewed constitutional rights, including voting for blacks. Together, these resulted in the most far-reaching changes in New Orleans' 20th century history. Though legal and civil equality were re-established by
11468-521: The rest of the territory. In retaliation, then-governor Étienne Perier launched a campaign to completely destroy the Natchez nation and its Native allies. By 1731, the Natchez people had been killed, enslaved, or dispersed among other tribes, but the campaign soured relations between France and the territory's Native Americans leading directly into the Chickasaw Wars of the 1730s. Relations with Louisiana's Native American population remained
11590-586: The result of sustained rainfall, rapid snow melt, monsoons , or tropical cyclones . However, large rivers may have rapid flooding events in areas with dry climates, since they may have large basins but small river channels, and rainfall can be very intense in smaller areas of those basins. In extremely flat areas, such as the Red River Valley of the North in Minnesota , North Dakota , and Manitoba ,
11712-480: The risks associated with large debris entrained by the flow motion. Floods can be a huge destructive power. When water flows, it has the ability to demolish all kinds of buildings and objects, such as bridges, structures, houses, trees, and cars. Economical, social and natural environmental damages are common factors that are impacted by flooding events and the impacts that flooding has on these areas can be catastrophic. There have been numerous flood incidents around
11834-454: The rivers provide easy travel and access to commerce and industry. Flooding can damage property and also lead to secondary impacts. These include in the short term an increased spread of waterborne diseases and vector-bourne disesases , for example those diseases transmitted by mosquitos. Flooding can also lead to long-term displacement of residents. Floods are an area of study of hydrology and hydraulic engineering . A large amount of
11956-602: The roster, met the Georgia Tech Yellow Jackets . There had been controversy over whether Grier should be allowed to play due to his race, and whether Georgia Tech should even play at all due to Georgia's Governor Marvin Griffin 's opposition to racial integration. After Griffin publicly sent a telegram to the state's Board Of Regents requesting Georgia Tech not to engage in racially integrated events, Georgia Tech's president Blake R. Van Leer rejected
12078-497: The shore areas. Extreme flood events often result from coincidence such as unusually intense, warm rainfall melting heavy snow pack, producing channel obstructions from floating ice, and releasing small impoundments like beaver dams. Coincident events may cause extensive flooding to be more frequent than anticipated from simplistic statistical prediction models considering only precipitation runoff flowing within unobstructed drainage channels. Debris modification of channel geometry
12200-545: The situation for slaves in the New World . Afro-Creole was present in religious beliefs and the Louisiana Creole language. The religion most associated with this period was called Voodoo . In the city of New Orleans an inspiring mixture of foreign influences created a melting pot of culture that is still celebrated today. By the end of French colonization in Louisiana, New Orleans was recognized commercially in
12322-538: The smallest ephemeral streams in humid zones to normally-dry channels in arid climates to the world's largest rivers. When overland flow occurs on tilled fields, it can result in a muddy flood where sediments are picked up by run off and carried as suspended matter or bed load . Localized flooding may be caused or exacerbated by drainage obstructions such as landslides , ice , debris , or beaver dams. Slow-rising floods most commonly occur in large rivers with large catchment areas . The increase in flow may be
12444-462: The so-called Redeemers , regaining political control of the state legislature. The federal government gave up and withdrew its troops in 1877, ending Reconstruction . In 1892 the racially integrated unions of New Orleans led a general strike in the city from November 8 to 12, shutting down the city & winning the vast majority of their demands. Dixiecrats passed Jim Crow laws, establishing racial segregation in public facilities. In 1889,
12566-577: The state legislature passed more restrictions on manumissions of slaves and virtually ended it in 1852. In the 1850s, white Francophones remained an intact and vibrant community in New Orleans. They maintained instruction in French in two of the city's four school districts (all served white students). In 1860, the city had 13,000 free people of color ( gens de couleur libres ), the class of free, mostly mixed-race people that expanded in number during French and Spanish rule. They set up some private schools for their children. The census recorded 81 percent of
12688-527: The supply of vegetation that can absorb rainfall. During times of rain, some of the water is retained in ponds or soil, some is absorbed by grass and vegetation, some evaporates, and the rest travels over the land as surface runoff . Floods occur when ponds, lakes, riverbeds, soil, and vegetation cannot absorb all the water. This has been exacerbated by human activities such as draining wetlands that naturally store large amounts of water and building paved surfaces that do not absorb any water. Water then runs off
12810-778: The territory's French-speaking population, these refugees had a significant impact on the culture of Louisiana, including developing its sugar industry and cultural institutions. As more refugees were allowed into the Territory of Orleans , St. Dominican refugees who had first gone to Cuba also arrived. Many of the white Francophones had been deported by officials in Cuba in 1809 as retaliation for Bonapartist schemes. Nearly 90 percent of these immigrants settled in New Orleans. The 1809 migration brought 2,731 whites, 3,102 free people of color (of mixed-race European and African descent), and 3,226 slaves of primarily African descent, doubling
12932-440: The third most important factors for small and large watersheds, respectively. Time of Concentration is the time required for runoff from the most distant point of the upstream drainage area to reach the point of the drainage channel controlling flooding of the area of interest. The time of concentration defines the critical duration of peak rainfall for the area of interest. The critical duration of intense rainfall might be only
13054-673: The traditional date to mark the anniversary, but the actual day is unknown) by the French Mississippi Company , under the direction of Jean-Baptiste Le Moyne de Bienville , on land inhabited by the Chitimacha . It was named for Philippe II, Duke of Orléans , who was regent of the Kingdom of France at the time. His title came from the French city of Orléans . As a French colony, Louisiana faced struggles with numerous Native American tribes , who were navigating
13176-699: The two Hollandic Water Lines , the Stelling van Amsterdam , the Frisian Water Line , the IJssel Line , the Peel-Raam Line , and the Grebbe line in that country. To count as controlled , a military inundation has to take the interests of the civilian population into account, by allowing them a timely evacuation , by making the inundation reversible , and by making an attempt to minimize
13298-533: The war, 1868 further strengthened the English-only policy imposed by federal representatives. With the predominance of English speakers, that language had already become dominant in business and government. By the end of the 19th century, French usage had faded. It was also under pressure from Irish, Italian and German immigrants. However, as late as 1902 "one-fourth of the population of the city spoke French in ordinary daily intercourse, while another two-fourths
13420-543: The war, it was spared the destruction through warfare suffered by many other cities of the American South . The Union Army eventually extended its control north along the Mississippi River and along the coastal areas. As a result, most of the southern portion of Louisiana was originally exempted from the liberating provisions of the 1863 Emancipation Proclamation issued by President Abraham Lincoln . Large numbers of rural ex-slaves and some free people of color from
13542-441: The water cycle and sea level rise . For example, climate change makes extreme weather events more frequent and stronger. This leads to more intense floods and increased flood risk. Natural types of floods include river flooding, groundwater flooding coastal flooding and urban flooding sometimes known as flash flooding. Tidal flooding may include elements of both river and coastal flooding processes in estuary areas. There
13664-487: The water overtops or breaks levees , resulting in some of that water escaping its usual boundaries. Flooding may also occur due to an accumulation of rainwater on saturated ground. This is called an areal flood . The size of a lake or other body of water naturally varies with seasonal changes in precipitation and snow melt. Those changes in size are however not considered a flood unless they flood property or drown domestic animals . Floods can also occur in rivers when
13786-515: The waters in a flood are very deep and have strong currents . Deaths do not just occur from drowning, deaths are connected with dehydration , heat stroke , heart attack and any other illness that needs medical supplies that cannot be delivered. Injuries can lead to an excessive amount of morbidity when a flood occurs. Injuries are not isolated to just those who were directly in the flood, rescue teams and even people delivering supplies can sustain an injury. Injuries can occur anytime during
13908-450: The world which have caused devastating damage to infrastructure, the natural environment and human life. Floods can have devastating impacts to human societies. Flooding events worldwide are increasing in frequency and severity, leading to increasing costs to societies. Catastrophic riverine flooding can result from major infrastructure failures, often the collapse of a dam . It can also be caused by drainage channel modification from
14030-557: The world's population lives in close proximity to major coastlines , while many major cities and agricultural areas are located near floodplains . There is significant risk for increased coastal and fluvial flooding due to changing climatic conditions. Floods can happen on flat or low-lying areas when water is supplied by rainfall or snowmelt more rapidly than it can either infiltrate or run off . The excess accumulates in place, sometimes to hazardous depths. Surface soil can become saturated, which effectively stops infiltration, where
14152-415: The young colony. The colonists turned to sub-Saharan African slaves to make their investments in Louisiana profitable. In the late 1710s the transatlantic slave trade imported enslaved Africans into the colony. This led to the biggest shipment in 1716 where several trading ships appeared with slaves as cargo to the local residents in a one-year span. By 1724, the large number of blacks in Louisiana prompted
14274-406: Was able to understand the language perfectly," and as late as 1945, many elderly Creole women spoke no English. The last major French language newspaper, L'Abeille de la Nouvelle-Orléans (New Orleans Bee), ceased publication on December 27, 1923, after 96 years. According to some sources, Le Courrier de la Nouvelle Orleans continued until 1955. As the city was captured and occupied early in
14396-553: Was an important port for smuggling aid to the American revolutionaries , and transporting military equipment and supplies up the Mississippi River . Beginning in the 1760s, Filipinos began to settle in and around New Orleans. Bernardo de Gálvez y Madrid, Count of Gálvez successfully directed a southern campaign against the British from the city in 1779. The Third Treaty of San Ildefonso in 1800 restored French control of New Orleans and Louisiana, but Napoleon sold both to
14518-429: Was arrested. The case resulting from this incident, Plessy v. Ferguson , was heard by the U.S. Supreme Court in 1896. The court ruled that " separate but equal " accommodations were constitutional, effectively upholding Jim Crow measures. In practice, African American public schools and facilities were underfunded across the South. The Supreme Court ruling contributed to this period as the nadir of race relations in
14640-765: Was heavy, a fast snowmelt can push water out of the banks of a tributary river so that it moves overland, to a point further downstream in the river or completely to another streambed. Overland flooding can be devastating because it is unpredictable, it can occur very suddenly with surprising speed, and in such flat land it can run for miles. It is these qualities that set it apart from simple "overland flow". Rapid flooding events, including flash floods , more often occur on smaller rivers, rivers with steep valleys, rivers that flow for much of their length over impermeable terrain, or normally-dry channels. The cause may be localized convective precipitation (intense thunderstorms ) or sudden release from an upstream impoundment created behind
14762-593: Was once the territorial capital of French Louisiana before becoming part of the United States in the Louisiana Purchase of 1803. New Orleans in 1840 was the third most populous city in the United States, and it was the largest city in the American South from the Antebellum era until after World War II . The city has historically been very vulnerable to flooding , due to its high rainfall, low lying elevation, poor natural drainage, and proximity to multiple bodies of water. State and federal authorities have installed
14884-426: Was the largest mass lynching in U.S. history. In July 1900 the city was swept by white mobs rioting after Robert Charles, a young African American, killed a policeman and temporarily escaped. The mob killed him and an estimated 20 other blacks; seven whites died in the days-long conflict, until a state militia suppressed it. New Orleans' economic and population zenith in relation to other American cities occurred in
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