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55-682: Although the Quillayute is one of the main rivers on the Olympic Peninsula and has a large drainage area , due to an unusual naming arrangement it is officially very short, being only about 4 miles (6.4 km) long. At the confluence of the Sol Duc and Bogachiel rivers the use of the Quillayute name ends, although these source rivers continue far into the interior of the Olympic Mountains . The name "Quillayute" comes from

110-484: A sink , which may be a permanent lake, a dry lake , or a point where surface water is lost underground . Drainage basins are similar but not identical to hydrologic units , which are drainage areas delineated so as to nest into a multi-level hierarchical drainage system . Hydrologic units are defined to allow multiple inlets, outlets, or sinks. In a strict sense, all drainage basins are hydrologic units but not all hydrologic units are drainage basins. About 48.71% of

165-414: A watershed , though in other English-speaking places, "watershed" is used only in its original sense, that of the drainage divide line. A drainage basin's boundaries are determined by watershed delineation , a common task in environmental engineering and science. In a closed drainage basin, or endorheic basin , rather than flowing to the ocean, water converges toward the interior of the basin, known as

220-541: A center for resort and travel destinations in the United States. New York City is the most populous city in the country and a major world financial center. Seventy-one of the world's Fortune 500 companies have their corporate headquarters in New York City, while Midtown Manhattan , with 400 million square feet of office space in 2018, is the largest central business district in the world. Washington, D.C.

275-454: A drainage basin, and there are different ways to interpret that data. In the unlikely event that the gauges are many and evenly distributed over an area of uniform precipitation, using the arithmetic mean method will give good results. In the Thiessen polygon method, the drainage basin is divided into polygons with the rain gauge in the middle of each polygon assumed to be representative for

330-540: A drainage boundary is referred to as watershed delineation . Finding the area and extent of a drainage basin is an important step in many areas of science and engineering. Most of the water that discharges from the basin outlet originated as precipitation falling on the basin. A portion of the water that enters the groundwater system beneath the drainage basin may flow towards the outlet of another drainage basin because groundwater flow directions do not always match those of their overlying drainage network. Measurement of

385-564: A single point, such as a river mouth , or flows into another body of water , such as a lake or ocean . A basin is separated from adjacent basins by a perimeter, the drainage divide , made up of a succession of elevated features, such as ridges and hills . A basin may consist of smaller basins that merge at river confluences , forming a hierarchical pattern . Other terms for a drainage basin are catchment area , catchment basin , drainage area , river basin , water basin , and impluvium . In North America, they are commonly called

440-443: A warm temperate climate ( Cfa Köppen/ Do Trewartha) with long and hot summers with at least one month over 22°C (71.6°F), cool winters with all months over freezing, and six to seven months above 50°F. Although winter precipitation is more likely to fall as rain than as snow, occasional heavy snow is possible. The area from the southern Delmarva Peninsula , southeast Virginia, and central North Carolina south to central Florida

495-547: Is humid subtropical ( Cfa/Cf ), with hot and rainy summers, mild and drier winters, and eight to twelve months above 50°F. Urban heat island exclaves of this zone are found north of this area in Baltimore and Washington, D.C. The region of Florida from the south-central region of the state south to the Florida Keys has a tropical climate ( Af/Aw/Ar ) that is usually frost-free and warm to hot all year, and all of

550-528: Is more likely to fall as rain than as snow, occasional heavy snow is possible. The East Coast, with the exception of eastern Maine, is a low-relief, passive margin coast. It has been shaped by the Pleistocene glaciation in the far northern areas in New England, with offshore islands such as Nantucket , Martha's Vineyard , Block Island , and Fishers Island . From northern New Jersey southward,

605-487: Is referred to as " watershed management ". In Brazil , the National Policy of Water Resources, regulated by Act n° 9.433 of 1997, establishes the drainage basin as the territorial division of Brazilian water management. When a river basin crosses at least one political border, either a border within a nation or an international boundary, it is identified as a transboundary river . Management of such basins becomes

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660-614: Is the Dead Sea . Drainage basins have been historically important for determining territorial boundaries, particularly in regions where trade by water has been important. For example, the English crown gave the Hudson's Bay Company a monopoly on the fur trade in the entire Hudson Bay basin, an area called Rupert's Land . Bioregional political organization today includes agreements of states (e.g., international treaties and, within

715-429: Is the federal capital and political nerve center of the United States. Many organizations such as defense contractors, civilian contractors, nonprofit organizations, lobbying firms, trade unions, industry trade groups and professional associations have their headquarters in or near Washington, D.C., in order to be close to the federal government . Miami is one of the top domestic and international travel destinations in

770-713: The African Great Lakes , the interiors of Australia and the Arabian Peninsula , and parts in Mexico and the Andes . Some of these, such as the Great Basin, are not single drainage basins but collections of separate, adjacent closed basins. In endorheic bodies of water where evaporation is the primary means of water loss, the water is typically more saline than the oceans. An extreme example of this

825-765: The Continental Divide , northern Alaska and parts of North Dakota , South Dakota , Minnesota , and Montana in the United States, the north shore of the Scandinavian peninsula in Europe, central and northern Russia, and parts of Kazakhstan and Mongolia in Asia , which totals to about 17% of the world's land. Just over 13% of the land in the world drains to the Pacific Ocean . Its basin includes much of China, eastern and southeastern Russia, Japan,

880-714: The Korean Peninsula , most of Indochina, Indonesia and Malaysia, the Philippines, all of the Pacific Islands , the northeast coast of Australia , and Canada and the United States west of the Continental Divide (including most of Alaska), as well as western Central America and South America west of the Andes. The Indian Ocean 's drainage basin also comprises about 13% of Earth's land. It drains

935-765: The Potomac River , respectively, both of which are tidal arms of the Atlantic Ocean. The original Thirteen Colonies of Great Britain in North America all lay along the East Coast. Two additional U.S. states on the East Coast were not among the original Thirteen Colonies: Maine became part of the English Colony of Massachusetts in 1677 and Florida was held by the British from

990-586: The Quileute people. In the Quileute language the name is /kʷoʔlíːyot'/, which perhaps derived from /kʷolíː/ ("wolves"), and was the name of a village at La Push . The Quillayute River is the current, traditional, and ancestral center of the territory of the Quileute Native Tribe , which before European settlement occupied the entire drainage basin (plus that of the Hoh River ). Presently

1045-769: The coastline where the Eastern United States meets the Atlantic Ocean . The Thirteen Colonies , which formed the United States in 1776 were located on this coast, and it has played an important role in the development of the United States. The region is generally understood to include the U.S. states that border the Atlantic Ocean: Connecticut , Delaware , Florida , Georgia , Maine , Maryland , Massachusetts , New Hampshire , New Jersey , New York , North Carolina , Rhode Island , South Carolina , and Virginia , as well as

1100-680: The groundwater . A drainage basin is an area of land where all flowing surface water converges to a single point, such as a river mouth, or flows into another body of water, such as a lake or ocean. East Coast of the United States The East Coast of the United States , also known as the Eastern Seaboard , the Atlantic Coast , and the Atlantic Seaboard , is the region encompassing

1155-617: The 12 months of the year average above 18 °C (64.4 °F). This region of Florida is the only tropical climate in the continental U.S. Although landfalls are rare, the Eastern Seaboard is susceptible to hurricanes in the Atlantic hurricane season, officially running from June 1 to November 30, although hurricanes can occur before or after these dates. Hurricanes Hazel , Hugo , Bob , Isabel , Irene , and Sandy , and most recently Florence , Isaias , Henri , and Ida are some of

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1210-779: The East Coast is connected from the Annisquam River in Gloucester, Massachusetts to Miami, Florida , by the Intracoastal Waterway , also known as the East Coast Canal, which was completed in 1912. Amtrak's Downeaster and Northeast Regional offer the main passenger rail service on the Seaboard. The Acela Express offers the only high-speed rail passenger service in the Americas, by

1265-623: The US, interstate compacts ) or other political entities in a particular drainage basin to manage the body or bodies of water into which it drains. Examples of such interstate compacts are the Great Lakes Commission and the Tahoe Regional Planning Agency . In hydrology , the drainage basin is a logical unit of focus for studying the movement of water within the hydrological cycle . The process of finding

1320-415: The United States. Miami is the warmest major city in the continental United States in winter, which contributes to it being a major tourism hub for international visitors. Miami has one of the largest concentrations of international banks in the United States, and the third-largest skyline in the U.S. with over 439 high-rises, 68 of which exceed 490 ft (149 m). Port of Miami is the busiest cruise port in

1375-406: The basin, it can form tributaries that change the structure of the land. There are three different main types, which are affected by the rocks and ground underneath. Rock that is quick to erode forms dendritic patterns, and these are seen most often. The two other types of patterns that form are trellis patterns and rectangular patterns. Rain gauge data is used to measure total precipitation over

1430-460: The coastal plain broadens southwards, separated from the Piedmont region by the Atlantic Seaboard fall line of the East Coast rivers, often marking the head of navigation and prominent sites of cities. The coastal areas from Long Island south to Florida are often made up of barrier islands that front the coastal areas, with the long stretches of sandy beaches. Many of the larger capes along

1485-401: The coastal wilderness strip north of the river. This Clallam County, Washington state location article is a stub . You can help Misplaced Pages by expanding it . This article related to a river in the state of Washington is a stub . You can help Misplaced Pages by expanding it . Drainage area A drainage basin is an area of land in which all flowing surface water converges to

1540-465: The coastline lies along the Atlantic Ocean . The 14 states that have a shoreline on the Atlantic Ocean are (from north to south): Maine , New Hampshire , Massachusetts , Rhode Island , Connecticut , New York , New Jersey , Delaware , Maryland , Virginia , North Carolina , South Carolina , Georgia , and Florida . Pennsylvania and Washington, D.C. border the Delaware River and

1595-430: The discharge of water from a basin may be made by a stream gauge located at the basin's outlet. Depending on the conditions of the drainage basin, as rainfall occurs some of it seeps directly into the ground. This water will either remain underground, slowly making its way downhill and eventually reaching the basin, or it will permeate deeper into the soil and consolidate into groundwater aquifers. As water flows through

1650-441: The drainage area is dependent on the soil type. Certain soil types such as sandy soils are very free-draining, and rainfall on sandy soil is likely to be absorbed by the ground. However, soils containing clay can be almost impermeable and therefore rainfall on clay soils will run off and contribute to flood volumes. After prolonged rainfall even free-draining soils can become saturated , meaning that any further rainfall will reach

1705-697: The drainage basin to the mouth, and may accumulate there, disturbing the natural mineral balance. This can cause eutrophication where plant growth is accelerated by the additional material. Because drainage basins are coherent entities in a hydrological sense, it has become common to manage water resources on the basis of individual basins. In the U.S. state of Minnesota , governmental entities that perform this function are called " watershed districts ". In New Zealand, they are called catchment boards. Comparable community groups based in Ontario, Canada, are called conservation authorities . In North America, this function

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1760-857: The eastern coast of Africa, the coasts of the Red Sea and the Persian Gulf , the Indian subcontinent , Burma, and most parts of Australia . The five largest river basins (by area), from largest to smallest, are those of the Amazon (7 million km ), the Congo (4 million km ), the Nile (3.4 million km ), the Mississippi (3.22 million km ), and the Río de la Plata (3.17 million km ). The three rivers that drain

1815-532: The end of the French and Indian War until 1781 and was part of New Spain until 1821. In present-day Florida, Spanish explorer Juan Ponce de León made the first textual records of the state during his 1513 voyage. The state was initially named for Ponce de Ponce de León, who called the peninsula La Pascua Florida in recognition of the verdant landscape and because it was the Easter season. Delaware Colony and

1870-513: The federal capital of Washington, D.C. , and non-coastline states: Pennsylvania , Vermont , and West Virginia . The place name East Coast derives from the idea that the contiguous 48 states are defined by two major coastlines, one at the western edge and one on the eastern edge. Other terms for referring to this area include the Eastern Seaboard , which is another term for coastline, Atlantic Coast, and Atlantic Seaboard because

1925-522: The first spot in the United States that immigrants arrived and the close proximity of Europe , the Caribbean , and Latin America , the East Coast is home to a diverse population and home to multi-cultures when compared to the rest of the U.S. From the strong Latin culture in southern Florida , to the 200-year-old Gullah culture of the low country coastal islands of Georgia and South Carolina , to

1980-527: The greatest portion of western Sub-Saharan Africa , as well as Western Sahara and part of Morocco . The two major mediterranean seas of the world also flow to the Atlantic. The Caribbean Sea and Gulf of Mexico basin includes most of the U.S. interior between the Appalachian and Rocky Mountains , a small part of the Canadian provinces of Alberta and Saskatchewan , eastern Central America ,

2035-435: The ground and along rivers it can pick up nutrients , sediment , and pollutants . With the water, they are transported towards the outlet of the basin, and can affect the ecological processes along the way as well as in the receiving water body . Modern use of artificial fertilizers , containing nitrogen (as nitrates ), phosphorus , and potassium , has affected the mouths of drainage basins. The minerals are carried by

2090-781: The ground at its terminus, the area can go by several names, such playa, salt flat, dry lake , or alkali sink . The largest endorheic basins are in Central Asia , including the Caspian Sea , the Aral Sea , and numerous smaller lakes. Other endorheic regions include the Great Basin in the United States, much of the Sahara Desert , the drainage basin of the Okavango River ( Kalahari Basin ), highlands near

2145-639: The islands of the Caribbean and the Gulf, and a small part of northern South America. The Mediterranean Sea basin, with the Black Sea , includes much of North Africa , east-central Africa (through the Nile River ), Southern , Central, and Eastern Europe , Turkey , and the coastal areas of Israel , Lebanon , and Syria . The Arctic Ocean drains most of Western Canada and Northern Canada east of

2200-417: The largest city and the largest metropolitan area on the East Coast. The East Coast is the most populated coastal area in the United States. Hartford The primary Interstate Highway along the East Coast is Interstate 95 , completed in 2018, which replaced the historic U.S. Route 1 ( Atlantic Highway ), the original federal highway that traversed all East Coast states, except Delaware . By water,

2255-1441: The lenient US definition of high speed rail. Between New York and Boston the Acela Express has up to a 54% share of the combined train and air passenger market. Some of the largest airports in the United States are located along the East Coast of the United States, such as John F. Kennedy International Airport in Queens , New York City , Logan International Airport in Boston , Newark Liberty Airport in Newark, New Jersey , Philadelphia International Airport in Philadelphia , Baltimore–Washington International Airport near Baltimore , Dulles International Airport near Washington, D.C. , Hartsfield–Jackson International Airport in Atlanta , Miami International Airport in Miami , Charlotte Douglas International Airport in Charlotte, North Carolina , Tampa International Airport in Tampa , and Orlando International Airport in Orlando, Florida . As

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2310-463: The lower East Coast are in fact barrier islands, like the Outer Banks of North Carolina and Cape Canaveral , Florida. The Florida Keys are made up of limestone coral and provide the only coral reefs on the U.S. mainland. In 2010, the population of the states that have shoreline on the East Coast was estimated at 112,642,503 (about 36% of the country's total population). New York City is both

2365-538: The many historic cities in the Mid-Atlantic , where a strong English, German, Italian, Irish, and French culture are present, the East Coast is significantly more diverse than the rest of the United States. Numerous Chinatowns in New York City , and Little Havana in Miami , are examples of such cultural centers in the bigger cities. The East Coast is home to much of the political and financial power and

2420-686: The monthly mean temperature of the coldest month (January) and the number of months averaging above 50 °F (10 °C), respectively. The region from northern Maine and Upstate New York south to almost all of Connecticut, most of northern New Jersey (except for areas close enough to New York City ), most of Pennsylvania, and western Maryland has a humid continental climate ( Dfa/Dfb/Dc ), with warm-to-hot summers, cold and snowy winters with at least one month averaging below freezing, and four to seven months with mean temperatures warmer than 50 °F. The area from Martha's Vineyard and extreme SW Rhode Island to southern Delaware and western North Carolina has

2475-465: The more significant storms to have affected the region. The least common climate on the East Coast is the oceanic ( Cfb/Do ), which is only found on Block Island , Nantucket , and the Outer Cape and Chatham on Cape Cod , and in areas of the southern Appalachian Mountains . This zone has all monthly averages between 0 and 22 °C and six to seven months above 50 °F. Although winter precipitation

2530-514: The most water, from most to least, are the Amazon, Ganges , and Congo rivers. Endorheic basin are inland basins that do not drain to an ocean. Endorheic basins cover around 18% of the Earth's land. Some endorheic basins drain to an Endorheic lake or Inland sea . Many of these lakes are ephemeral or vary dramatically in size depending on climate and inflow. If water evaporates or infiltrates into

2585-476: The natives live at the town of La Push on their small treaty reservation which adjoins the south shore of the river at the mouth. The final 2 to 3 miles (3.2 to 4.8 km) at the mouth of the Quillayute pass through the narrow coastal strip of the Olympic National Park . Park roads lead to the Mora Campground and Rialto Beach recreation area on the north side of the Quillayute. There are camping and picnicking facilities, public parking, and trailhead access to

2640-462: The provinces of New Jersey , New York , and Pennsylvania had been colonized by the Dutch as New Netherland until they were ceded to the British in the mid- to late-17th century. Until 1791, Vermont was an independent nation as the Vermont Republic . Three basic climate regions occur on the East Coast according to the Köppen climate classification and four occur according to the Trewartha climate classification from north to south based on

2695-418: The rainfall on the area of land included in its polygon. These polygons are made by drawing lines between gauges, then making perpendicular bisectors of those lines form the polygons. The isohyetal method involves contours of equal precipitation are drawn over the gauges on a map. Calculating the area between these curves and adding up the volume of water is time-consuming. Isochrone maps can be used to show

2750-572: The responsibility of the countries sharing it. Nile Basin Initiative , OMVS for Senegal River , Mekong River Commission are a few examples of arrangements involving management of shared river basins. Management of shared drainage basins is also seen as a way to build lasting peaceful relationships among countries. The catchment is the most significant factor determining the amount or likelihood of flooding . Catchment factors are: topography , shape, size, soil type, and land use (paved or roofed areas). Catchment topography and shape determine

2805-461: The river rather than being absorbed by the ground. If the surface is impermeable the precipitation will create surface run-off which will lead to higher risk of flooding; if the ground is permeable, the precipitation will infiltrate the soil. Land use can contribute to the volume of water reaching the river, in a similar way to clay soils. For example, rainfall on roofs, pavements , and roads will be collected by rivers with almost no absorption into

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2860-418: The speed with which the runoff reaches a river. A long thin catchment will take longer to drain than a circular catchment. Size will help determine the amount of water reaching the river, as the larger the catchment the greater the potential for flooding. It is also determined on the basis of length and width of the drainage basin. Soil type will help determine how much water reaches the river. The runoff from

2915-415: The time taken for rain to reach the river, while catchment size, soil type, and development determine the amount of water to reach the river. Generally, topography plays a big part in how fast runoff will reach a river. Rain that falls in steep mountainous areas will reach the primary river in the drainage basin faster than flat or lightly sloping areas (e.g., > 1% gradient). Shape will contribute to

2970-477: The time taken for runoff water within a drainage basin to reach a lake, reservoir or outlet, assuming constant and uniform effective rainfall. Drainage basins are the principal hydrologic unit considered in fluvial geomorphology . A drainage basin is the source for water and sediment that moves from higher elevation through the river system to lower elevations as they reshape the channel forms. Drainage basins are important in ecology . As water flows over

3025-405: The world's land drains to the Atlantic Ocean . In North America , surface water drains to the Atlantic via the Saint Lawrence River and Great Lakes basins, the Eastern Seaboard of the United States, the Canadian Maritimes , and most of Newfoundland and Labrador . Nearly all of South America east of the Andes also drains to the Atlantic, as does most of Western and Central Europe and

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