The Mississippi River is the second-longest river and chief river of the second-largest drainage system on the North American continent, second only to the Hudson Bay drainage system. Its source is Lake Itasca in northern Minnesota and it flows south for 2,320 miles to the Mississippi River Delta in the Gulf of Mexico. With its many tributaries, the Mississippi's watershed drains all or parts of 32 U. S. two Canadian provinces between the Rocky and Appalachian mountains. The main stem is within the United States; the Mississippi ranks as the fifteenth-largest river by discharge in the world. The river either borders or passes through the states of Minnesota, Iowa, Missouri, Tennessee, Arkansas and Louisiana. Native Americans have lived along its tributaries for thousands of years. Most were hunter-gatherers, but some, such as the Mound Builders, formed prolific agricultural societies; the arrival of Europeans in the 16th century changed the native way of life as first explorers settlers, ventured into the basin in increasing numbers.
The river served first as a barrier, forming borders for New Spain, New France, the early United States, as a vital transportation artery and communications link. In the 19th century, during the height of the ideology of manifest destiny, the Mississippi and several western tributaries, most notably the Missouri, formed pathways for the western expansion of the United States. Formed from thick layers of the river's silt deposits, the Mississippi embayment is one of the most fertile regions of the United States. During the American Civil War, the Mississippi's capture by Union forces marked a turning point towards victory, due to the river's strategic importance to the Confederate war effort; because of substantial growth of cities and the larger ships and barges that replaced steamboats, the first decades of the 20th century saw the construction of massive engineering works such as levees and dams built in combination. A major focus of this work has been to prevent the lower Mississippi from shifting into the channel of the Atchafalaya River and bypassing New Orleans.
Since the 20th century, the Mississippi River has experienced major pollution and environmental problems – most notably elevated nutrient and chemical levels from agricultural runoff, the primary contributor to the Gulf of Mexico dead zone. The word Mississippi itself comes from Misi zipi, the French rendering of the Anishinaabe name for the river, Misi-ziibi. In the 18th century, the river was the primary western boundary of the young United States, since the country's expansion westward, the Mississippi River has been considered a convenient if approximate dividing line between the Eastern and Midwestern United States, the Western United States; this is exemplified by the Gateway Arch in St. Louis and the phrase "Trans-Mississippi" as used in the name of the Trans-Mississippi Exposition, it is common to qualify a regionally superlative landmark in relation to it, such as "the highest peak east of the Mississippi" or "the oldest city west of the Mississippi". The FCC uses it as the dividing line for broadcast call-signs, which begin with W to the east and K to the west, mixing together in media markets along the river.
The Mississippi River can be divided into three sections: the Upper Mississippi, the river from its headwaters to the confluence with the Missouri River. The Upper Mississippi runs from its headwaters to its confluence with the Missouri River at St. Louis, Missouri, it is divided into two sections: The headwaters, 493 miles from the source to Saint Anthony Falls in Minneapolis, Minnesota. The source of the Upper Mississippi branch is traditionally accepted as Lake Itasca, 1,475 feet above sea level in Itasca State Park in Clearwater County, Minnesota; the name "Itasca" was chosen to designate the "true head" of the Mississippi River as a combination of the last four letters of the Latin word for truth and the first two letters of the Latin word for head. However, the lake is in turn fed by a number of smaller streams. From its origin at Lake Itasca to St. Louis, the waterway's flow is moderated by 43 dams. Fourteen of these dams are located above Minneapolis in the headwaters region and serve multiple purposes, including power generation and recreation.
The remaining 29 dams, beginning in downtown Minneapolis, all contain locks and were constructed to improve commercial navigation of the upper river. Taken as a whole, these 43 dams shape the geography and influence the ecology of the upper river. Beginning just below Saint Paul and continuing throughout the upper and lower river, the Mississippi is further controlled by thousands of wing dikes that moderate the river's flow in order to maintain an open navigation channel and prevent the river from eroding its banks; the head of navigation on the Mississippi is the Coon Rapids Dam in Minnesota. Before it was built in 1913, steamboats could go upstream as far as Saint Cloud, depending on river conditions; the uppermost lock and dam on the Upper Mississippi River is the Upper St. Anthony Falls Lock an
Midwestern United States
The Midwestern United States referred to as the American Midwest, Middle West, or the Midwest, is one of four census regions of the United States Census Bureau. It occupies the northern central part of the United States, it was named the North Central Region by the Census Bureau until 1984. It is located between the Northeastern United States and the Western United States, with Canada to its north and the Southern United States to its south; the Census Bureau's definition consists of 12 states in the north central United States: Illinois, Iowa, Michigan, Missouri, North Dakota, South Dakota, Wisconsin. The region lies on the broad Interior Plain between the states occupying the Appalachian Mountain range and the states occupying the Rocky Mountain range. Major rivers in the region include, from east to west, the Ohio River, the Upper Mississippi River, the Missouri River. A 2012 report from the United States Census put the population of the Midwest at 65,377,684; the Midwest is divided by the Census Bureau into two divisions.
The East North Central Division includes Illinois, Michigan and Wisconsin, all of which are part of the Great Lakes region. The West North Central Division includes Iowa, Minnesota, North Dakota and South Dakota, several of which are located, at least within the Great Plains region. Chicago is the most populous city in the American Midwest and the third most populous in the entire country. Other large Midwestern cities include: Columbus, Detroit, Kansas City, Minneapolis, Cleveland, St. Louis, St. Paul, Cincinnati and Des Moines. Chicago and its suburbs form the largest metropolitan statistical area with 9.9 million people, followed by Metro Detroit, Minneapolis–St. Paul, Greater St. Louis, Greater Cleveland, Greater Cincinnati, the Kansas City metro area, the Columbus metro area; the term Midwestern has been in use since the 1880s to refer to portions of the central United States. A variant term, Middle West, has been used since the 19th century and remains common. Another term sometimes applied to the same general region is the heartland.
Other designations for the region have fallen out of use, such as the Northwest or Old Northwest and Mid-America. The Northwest Territory was one of the earliest territories of the United States, stretching northwest from the Ohio River to northern Minnesota and the upper-Mississippi; the upper-Mississippi watershed including the Missouri and Illinois Rivers was the setting for the earlier French settlements of the Illinois Country and the Ohio Country. Economically the region is balanced between heavy industry and agriculture, with finance and services such as medicine and education becoming important, its central location makes it a transportation crossroads for river boats, autos and airplanes. Politically, the region swings back and forth between the parties, thus is contested and decisive in elections. After the sociological study Middletown, based on Muncie, commentators used Midwestern cities as "typical" of the nation. Earlier, the rhetorical question, "Will it play in Peoria?", had become a stock phrase using Peoria, Illinois to signal whether something would appeal to mainstream America.
The region has a higher employment-to-population ratio than the Northeast, the West, the South, or the Sun Belt states as of 2011. Traditional definitions of the Midwest include the Northwest Ordinance Old Northwest states and many states that were part of the Louisiana Purchase; the states of the Old Northwest are known as Great Lakes states and are east-north central in the United States. The Ohio River runs along the southeastern section while the Mississippi River runs north to south near the center. Many of the Louisiana Purchase states in the west-north central United States, are known as Great Plains states, where the Missouri River is a major waterway joining with the Mississippi; the Midwest lies north of the 36°30′ parallel that the 1820 Missouri Compromise established as the dividing line between future slave and non-slave states. The Midwest Region is defined by the U. S. Census Bureau as these 12 states: Illinois: Old Northwest, Mississippi River, Ohio River, Great Lakes state Indiana: Old Northwest, Ohio River, Great Lakes state Iowa: Louisiana Purchase, Mississippi River, Missouri River state Kansas: Louisiana Purchase, Great Plains, Missouri River state Michigan: Old Northwest and Great Lakes state Minnesota: Old Northwest, Louisiana Purchase, Mississippi River, part of Red River Colony before 1818, Great Lakes state Missouri: Louisiana Purchase, Mississippi River, Missouri River, border state Nebraska: Louisiana Purchase, Great Plains, Missouri River state North Dakota: Louisiana Purchase, part of Red River Colony before 1818, Great Plains, Missouri River state Ohio: Old Northwest, Ohio River, Great Lakes state.
The southeastern part of the state is part of northern Appalachia South Dakota: Louisiana Purchase, Great Plains, Missouri River state Wisconsin: Old Northwest, Mississippi River, Great Lakes stateVarious organizations define the Midwest with different groups of states. For example, the Council of State Governments, an organization for communication and coordination among state governments, includes in its Midwe
Population density is a measurement of population per unit area or unit volume. It is applied to living organisms, most of the time to humans, it is a key geographical term. In simple terms population density refers to the number of people living in an area per kilometer square. Population density is population divided by total land water volume, as appropriate. Low densities may lead to further reduced fertility; this is called the Allee effect after the scientist. Examples of the causes in low population densities include: Increased problems with locating sexual mates Increased inbreeding For humans, population density is the number of people per unit of area quoted per square kilometer or square mile; this may be calculated for a county, country, another territory or the entire world. The world's population is around 7,500,000,000 and Earth's total area is 510,000,000 square kilometers. Therefore, the worldwide human population density is around 7,500,000,000 ÷ 510,000,000 = 14.7 per km2. If only the Earth's land area of 150,000,000 km2 is taken into account human population density is 50 per km2.
This includes all continental and island land area, including Antarctica. If Antarctica is excluded population density rises to over 55 people per km2. However, over half of the Earth's land mass consists of areas inhospitable to human habitation, such as deserts and high mountains, population tends to cluster around seaports and fresh-water sources. Thus, this number by itself does not give any helpful measurement of human population density. Several of the most densely populated territories in the world are city-states and dependencies; these territories have a small area and a high urbanization level, with an economically specialized city population drawing on rural resources outside the area, illustrating the difference between high population density and overpopulation The potential to maintain the agricultural aspects of deserts is limited as there is not enough precipitation to support a sustainable land. The population in these areas are low. Therefore, cities in the Middle East, such as Dubai, have been increasing in population and infrastructure growth at a fast pace.
Cities with high population densities are, by some, considered to be overpopulated, though this will depend on factors like quality of housing and infrastructure and access to resources. Most of the most densely populated cities are in Southeast Asia, though Cairo and Lagos in Africa fall into this category. City population and area are, however dependent on the definition of "urban area" used: densities are invariably higher for the central city area than when suburban settlements and the intervening rural areas are included, as in the areas of agglomeration or metropolitan area, the latter sometimes including neighboring cities. For instance, Milwaukee has a greater population density when just the inner city is measured, the surrounding suburbs excluded. In comparison, based on a world population of seven billion, the world's inhabitants, as a loose crowd taking up ten square feet per person, would occupy a space a little larger than Delaware's land area; the Gaza Strip has a population density of 5,046 pop/km.
Although arithmetic density is the most common way of measuring population density, several other methods have been developed to provide a more accurate measure of population density over a specific area. Arithmetic density: The total number of people / area of land Physiological density: The total population / area of arable land Agricultural density: The total rural population / area of arable land Residential density: The number of people living in an urban area / area of residential land Urban density: The number of people inhabiting an urban area / total area of urban land Ecological optimum: The density of population that can be supported by the natural resources Demography Human geography Idealized population Optimum population Population genetics Population health Population momentum Population pyramid Rural transport problem Small population size Distance sampling List of population concern organizations List of countries by population density List of cities by population density List of city districts by population density List of English districts by population density List of European cities proper by population density List of United States cities by population density List of islands by population density List of U.
S. states by population density List of Australian suburbs by population density Selected Current and Historic City, Ward & Neighborhood Density Duncan Smith / UCL Centre for Advanced Spatial Analysis. "World Population Density". Exploratory map shows data from the Global Human Settlement Layer produced by the European Commission JRC and the CIESIN Columbia University
Humid continental climate
A humid continental climate is a climatic region defined by Russo-German climatologist Wladimir Köppen in 1900, typified by large seasonal temperature differences, with warm to hot summers and cold winters. Precipitation is distributed throughout the year; the definition of this climate regarding temperature is as follows: the mean temperature of the coldest month must be below −3 °C and there must be at least four months whose mean temperatures are at or above 10 °C. In addition, the location in question must not be arid; the Dfb and Dsb subtypes are known as hemiboreal. Humid continental climates are found between latitudes 40° N and 60° N, within the central and northeastern portions of North America and Asia, they are much less found in the Southern Hemisphere due to the larger ocean area at that latitude and the consequent greater maritime moderation. In the Northern Hemisphere some of the humid continental climates in Scandinavia, Nova Scotia, Newfoundland are maritime-influenced, with cool summers and winters being just below the freezing mark.
More extreme humid continental climates found in northeast China, southern Siberia, the Canadian Prairies, the Great Lakes region of the American Midwest and Central Canada combine hotter summer maxima and colder winters than the marine-based variety. Using the Köppen climate classification, a climate is classified as humid continental when the temperature of the coldest month is below −3 °C and there must be at least four months whose mean temperatures are at or above 10 °C; these temperatures were not arbitrary. In Europe, the −3 °C average temperature isotherm was near the southern extent of winter snowpack; the 10 °C average temperature was found to be the minimum temperature necessary for tree growth. Wide temperature ranges are common within this climate zone. Second letter in the classification symbol defines seasonal rainfall as follows: s: A dry summer—the driest summer month has less than 40 millimetres of rainfall and has less than 1⁄3 the precipitation of the wettest winter month, w: A dry winter—the driest winter month has less than one‑tenth of the precipitation found in the wettest summer month, f: Without dry season—does not meet either of the alternative specifications.while the third letter denotes the extent of summer heat: a: Hot summer, warmest month averages at least 22 °C, b: Warm summer, warmest month averages below 22 °C and at least four months averages above 10 °C.
Within North America, moisture within this climate regime is supplied by the Gulf of Mexico and adjacent western subtropical Atlantic. Precipitation is well distributed year-round in many areas with this climate, while others may see a marked reduction in wintry precipitation, which increases the chances of a wintertime drought. Snowfall occurs in all areas with a humid continental climate and in many such places is more common than rain during the height of winter. In places with sufficient wintertime precipitation, the snow cover is deep. Most summer rainfall occurs during thunderstorms, in North America and Asia an tropical system. Though humidity levels are high in locations with humid continental climates, the "humid" designation means that the climate is not dry enough to be classified as semi-arid or arid. By definition, forests thrive within this climate. Biomes within this climate regime include temperate woodlands, temperate grasslands, temperate deciduous, temperate evergreen forests, coniferous forests.
Within wetter areas, spruce, pine and oak can be found. Fall foliage is noted during the autumn. A hot summer version of a continental climate features an average temperature of at least 22 °C in its warmest month. Since these regimes are limited to the Northern Hemisphere, the warmest month is July or August. For example, Chicago has average July afternoon temperatures near 29 °C, while average January afternoon temperature are near −1 °C. Frost free periods last 4–6 months within this climate regime. Within North America, this climate includes small areas of central and southeast Canada, portions of the central and eastern United States from the 100th meridian eastward to the Atlantic. Precipitation is less seasonally uniform in the west; the western states of the central United States have thermal regimes which fit the Dfa climate type, but are quite dry, are grouped with the steppe climates. In the Eastern Hemisphere, this climate regime is found within interior Eurasia, east-central Asia, parts of India.
Within Europe, the Dfa climate type is present near the Black Sea in southern Ukraine, the Southern Federal District of Russia, southern Moldova, parts of southern Romania, Bulgaria, but tends to be drier and can be semi-arid in these places. In East Asia, this climate exhibits a monsoonal tendency with much higher precipitation in summer than in winter, due the effects of the strong Siberian High much colder winter temperatures than similar latitudes around the world, however with lower snowfall, the exception being western Japan with its heavy snowfall. Tōhoku, between Tokyo and Hokkaidō and Wester
1930 United States Census
The Fifteenth United States Census, conducted by the Census Bureau one month from April 1, 1930, determined the resident population of the United States to be 122,775,046, an increase of 13.7 percent over the 106,021,537 persons enumerated during the 1920 Census. The 1930 Census collected the following information: address name relationship to head of family home owned or rented if owned, value of home if rented, monthly rent whether owned a radio set whether on a farm sex race age marital status and, if married, age at first marriage school attendance literacy birthplace of person, their parents if foreign born: language spoken at home before coming to the U. S. year of immigration whether naturalized ability to speak English occupation and class of worker whether at work previous day veteran status if Indian: whether of full or mixed blood tribal affiliationFull documentation for the 1930 census, including census forms and enumerator instructions, is available from the Integrated Public Use Microdata Series.
The original census enumeration sheets were microfilmed by the Census Bureau in 1949. The microfilmed census is located on 2,667 rolls of microfilm, available from the National Archives and Records Administration. Several organizations host images of the microfilmed census online, digital indices. Microdata from the 1930 census are available through the Integrated Public Use Microdata Series. Aggregate data for small areas, together with electronic boundary files, can be downloaded from the National Historical Geographic Information System. 1930 Census Questions Hosted at CensusFinder.com 1931 U. S Census Report Contains 1930 Census results Historic US Census data 1930Census.com: 1930 United States Census for Genealogy & Family History Research 1930 Interactive US Census Find stories and more attached to names on the 1930 US census
St. Louis is an independent city and major inland port in the U. S. state of Missouri. It is situated along the western bank of the Mississippi River, which marks Missouri's border with Illinois; the Missouri River merges with the Mississippi River just north of the city. These two rivers combined form the fourth longest river system in the world; the city had an estimated 2017 population of 308,626 and is the cultural and economic center of the St. Louis metropolitan area, the largest metropolitan area in Missouri, the second-largest in Illinois, the 22nd-largest in the United States. Before European settlement, the area was a regional center of Native American Mississippian culture; the city of St. Louis was founded in 1764 by French fur traders Pierre Laclède and Auguste Chouteau, named after Louis IX of France. In 1764, following France's defeat in the Seven Years' War, the area was ceded to Spain and retroceded back to France in 1800. In 1803, the United States acquired the territory as part of the Louisiana Purchase.
During the 19th century, St. Louis became a major port on the Mississippi River, it separated from St. Louis County in 1877, becoming an independent city and limiting its own political boundaries. In 1904, it hosted the Summer Olympics; the economy of metropolitan St. Louis relies on service, trade, transportation of goods, tourism, its metro area is home to major corporations, including Anheuser-Busch, Express Scripts, Boeing Defense, Energizer, Enterprise, Peabody Energy, Post Holdings, Edward Jones, Go Jet and Sigma-Aldrich. Nine of the ten Fortune 500 companies based in Missouri are located within the St. Louis metropolitan area; this city has become known for its growing medical and research presence due to institutions such as Washington University in St. Louis and Barnes-Jewish Hospital. St. Louis has two professional sports teams: the St. Louis Cardinals of Major League Baseball and the St. Louis Blues of the National Hockey League. One of the city's iconic sights is the 630-foot tall Gateway Arch in the downtown area.
The area that would become St. Louis was a center of the Native American Mississippian culture, which built numerous temple and residential earthwork mounds on both sides of the Mississippi River, their major regional center was at Cahokia Mounds, active from 900 to 1500. Due to numerous major earthworks within St. Louis boundaries, the city was nicknamed as the "Mound City"; these mounds were demolished during the city's development. Historic Native American tribes in the area included the Siouan-speaking Osage people, whose territory extended west, the Illiniwek. European exploration of the area was first recorded in 1673, when French explorers Louis Jolliet and Jacques Marquette traveled through the Mississippi River valley. Five years La Salle claimed the region for France as part of La Louisiane; the earliest European settlements in the area were built in Illinois Country on the east side of the Mississippi River during the 1690s and early 1700s at Cahokia and Fort de Chartres. Migrants from the French villages on the opposite side of the Mississippi River founded Ste.
Genevieve in the 1730s. In early 1764, after France lost the 7 Years' War, Pierre Laclède and his stepson Auguste Chouteau founded what was to become the city of St. Louis; the early French families built the city's economy on the fur trade with the Osage, as well as with more distant tribes along the Missouri River. The Chouteau brothers gained a monopoly from Spain on the fur trade with Santa Fe. French colonists used African slaves as domestic workers in the city. France, alarmed that Britain would demand French possessions west of the Mississippi and the Missouri River basin after the losing New France to them in 1759–60, transferred these to Spain as part of the Viceroyalty of New Spain; these areas remained in Spanish possession until 1803. In 1780 during the American Revolutionary War, St. Louis was attacked by British forces Native American allies, in the Battle of St. Louis; the founding of St. Louis began in 1763. Pierre Laclede led an expedition to set up a fur-trading post farther up the Mississippi River.
Before Laclede had been a successful merchant. For this reason, he and his trading partner Gilbert Antoine de St. Maxent were offered monopolies for six years of the fur trading in that area. Although they were only granted rights to set-up a trading post and other members of his expedition set up a settlement; some historians believe that Laclede's determination to create this settlement was the result of his affair with a married woman Marie-Thérèse Bourgeois Chouteau in New Orleans. Laclede on his initial expedition was accompanied by Auguste Chouteau; some historians still debate. The reason for this lingering question is that all the documentation of the founding was loaned and subsequently destroyed in a fire. For the first few years of St. Louis's existence, the city was not recognized by any of the governments. Although thought to be under the control of the Spanish government, no one asserted any authority over the settlement, thus St. Louis had no local government; this led Laclede to assume a position of civil control, all problems were disposed i
A snow flurry is a term for a light snowfall that results in little or no snow accumulation. The US National Weather Service defines snow flurries as intermittent light snow that produces no measurable precipitation. In contrast, bursts of snowfall which do result in measurable snow accumulation are called snow showers. Snow shower Drizzle Precipitation Some Common Weather Terminology Glossary of Meteorology