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74-573: At Danville the river has a mean annual discharge of 480 cubic feet per second. The watershed of the river is largely agricultural land , with undulating hills over a bed of limestone . The river is a popular destination for fly fishing , in particular for varieties of bass . Occasionally, recreational kayakers and canoeists can be found on same-day trips. Water levels are Class I+ with possible mild class II. 37°48′53″N 84°42′59″W  /  37.81472°N 84.71639°W  / 37.81472; -84.71639 This article related to

148-427: 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 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 ,

222-437: 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 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

296-454: 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

370-540: 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

444-602: 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 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,

518-594: A river in Kentucky is a stub . You can help Misplaced Pages by expanding it . Drainage basin A drainage basin is an area of land in which 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 . 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

592-619: Is a calque of the Latin name, from μέσος ( mésos , "in the middle") and γήινος ( gḗinos , "of the earth"), from γῆ ( gê , "land, earth"). The original meaning may have been 'the sea in the middle of the earth', rather than 'the sea enclosed by land'. Ancient Iranians called it the "Roman Sea", and in Classical Persian texts , it was called Daryāy-e Rōm (دریای روم), which may be from Middle Persian form, Zrēh ī Hrōm (𐭦𐭫𐭩𐭤 𐭩 𐭤𐭫𐭥𐭬). The Carthaginians called it

666-582: Is known as al-Baḥr [al-Abyaḍ] al-Mutawassiṭ ( البحر [الأبيض] المتوسط ) 'the [White] Middle Sea'. In Islamic and older Arabic literature, it was Baḥr al-Rūm ( بحر الروم ) or al- Baḥr al-Rūmī ( بحر الرومي ) 'the Sea of the Romans' or 'the Roman Sea' or Baḥr al-šām ( بحر الشام ) or al-Baḥr al-šāmī ( البحر الشامي ) ("the Sea of Syria"). At first, that name referred only to the eastern Mediterranean, but

740-487: 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

814-614: 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

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888-713: 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

962-680: The Atlantic Ocean , surrounded by the Mediterranean Basin and almost completely enclosed by land: on the east by the Levant in West Asia , on the north by Anatolia in West Asia and Southern Europe , on the south by North Africa , and on the west almost by the Morocco–Spain border . The Mediterranean has played a central role in the history of Western civilization . Geological evidence indicates that around 5.9 million years ago,

1036-514: The Black Sea . In Persian, the name was translated as Baḥr-i Safīd , which was also used in later Ottoman Turkish . Similarly, in 19th century Greek, the name was Άσπρη Θάλασσα ( áspri thálassa ; "white sea"). According to Johann Knobloch, in classical antiquity , cultures in the Levant used colours to refer to the cardinal points: black referred to the north (explaining the name Black Sea ), yellow or blue to east, red to south (e.g.,

1110-607: 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 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

1184-740: The Italian Lakes (Po). While the Mediterranean watershed is bordered by other river basins in Europe, it is essentially bordered by endorheic basins or deserts elsewhere. The following countries are in the Mediterranean drainage basin while not having a coastline on the Mediterranean Sea: The following countries have a coastline on the Mediterranean Sea: Several other territories also border

1258-735: The Italian city-states like Amalfi and Genoa before the Crusades, according to the Cairo Geniza documents. A document dated 996 mentions Amalfian merchants living in Cairo . Another letter states that the Genoese had traded with Alexandria . The caliph al-Mustansir had allowed Amalfian merchants to reside in Jerusalem about 1060 in place of the Latin hospice . The Crusades led to

1332-735: The Mississippi (3.22 million km ), and the Río de la Plata (3.17 million km ). The three rivers that drain 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

1406-756: 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 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

1480-783: The Punic Wars in the 3rd and 2nd centuries BC, the Roman Republic defeated the Carthaginians to become the preeminent power in the Mediterranean. When Augustus founded the Roman Empire , the Romans referred to the Mediterranean as Mare Nostrum ("Our Sea"). For the next 400 years, the Roman Empire completely controlled the Mediterranean Sea and virtually all its coastal regions from Gibraltar to

1554-641: The Red Sea ) and white to west. That would explain the Bulgarian Byalo More , the Turkish Akdeniz , and the Arab nomenclature described above, lit. "White Sea". Major ancient civilizations were located around the Mediterranean. The sea provided routes for trade, colonization, and war, as well as food (from fishing and the gathering of other seafood) for numerous communities throughout

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1628-559: The Roman Empire , Mare Nostrum ("Our Sea"). The term Mare Mediterrāneum appears later: Solinus apparently used this in the 3rd century, but the earliest extant witness to it is in the 6th century, in Isidore of Seville . It means 'in the middle of land, inland' in Latin , a compound of medius ("middle"), terra ("land, earth"), and -āneus ("having the nature of"). The modern Greek name Μεσόγειος Θάλασσα ( mesógeios ; "inland")

1702-399: 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. Mediterranean Sea For other countries, click here . The Mediterranean Sea ( / ˌ m ɛ d ɪ t ə ˈ r eɪ n i ən / MED -ih-tə- RAY -nee-ən ) is a sea connected to

1776-528: The "Syrian Sea". In ancient Syrian texts, Phoenician epics and in the Hebrew Bible , it was primarily known as the "Great Sea", הים הגדול HaYam HaGadol , ( Numbers ; Book of Joshua ; Ezekiel ) or simply as "The Sea" ( 1 Kings ). However, it has also been called the "Hinder Sea" because of its location on the west coast of the region of Syria or the Holy Land (and therefore behind a person facing

1850-579: The 16th century and also maintained naval bases in southern France (1543–1544), Algeria and Tunisia. Barbarossa , the Ottoman captain is a symbol of this domination with the victory of the Battle of Preveza (1538). The Battle of Djerba (1560) marked the apex of Ottoman naval domination in the eastern Mediterranean. As the naval prowess of the European powers increased, they confronted Ottoman expansion in

1924-524: The 7th century, and with it the religion of Islam , which soon swept across from the east; at its greatest extent, the Arabs, under the Umayyads , controlled most of the Mediterranean region and left a lasting footprint on its eastern and southern shores. A variety of foodstuffs, spices and crops were introduced to the western Mediterranean's Spain and Sicily during Arab rule, via the commercial networks of

1998-735: The Andes. The Indian Ocean 's drainage basin also comprises about 13% of Earth's land. It drains 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 ),

2072-778: The Atlantic via the Strait of Gibraltar —the narrow strait that connects the Atlantic Ocean to the Mediterranean Sea and separates the Iberian Peninsula in Europe from Morocco in Africa —is only 14 km (9 mi) wide. The Mediterranean Sea encompasses a vast number of islands , some of them of volcanic origin. The two largest islands, in both area and population, are Sicily and Sardinia . The Mediterranean Sea has an average depth of 1,500 m (4,900 ft) and

2146-670: 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 , 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

2220-655: The Islamic world. These include sugarcane, rice, cotton, alfalfa, oranges, lemons, apricots, spinach, eggplants, carrots, saffron and bananas. The Arabs also continued extensive cultivation and production of olive oil (the Spanish words for 'oil' and 'olive'— aceite and aceituna , respectively—are derived from the Arabic al-zait , meaning 'olive juice'), and pomegranates (the heraldic symbol of Granada) from classical Greco-Roman times. The Arab invasions disrupted

2294-602: The Levant, being the only state in history to ever do so, being given the nickname "Roman Lake". The Western Roman Empire collapsed around 476 AD. The east was again dominant as Roman power lived on in the Byzantine Empire formed in the 4th century from the eastern half of the Roman Empire . Though the Eastern Roman Empire would continue to hold almost all of the Mediterranean, another power arose in

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2368-802: The Mediterranean Sea is the Nile , which takes its sources in equatorial Africa. The basin of the Nile constitutes about two-thirds of the Mediterranean drainage basin and encompasses areas as high as the Ruwenzori Mountains . Among other important rivers in Africa, are the Moulouya and the Chelif , both on the north side of the Atlas Mountains . In Asia, are the Ceyhan and Seyhan , both on

2442-612: The Mediterranean Sea to the Red Sea without ship lock, because the water level is essentially the same. The westernmost point of the Mediterranean is located at the transition from the Alborán Sea to the Strait of Gibraltar, the easternmost point is on the coast of the Gulf of Iskenderun in southeastern Turkey. The northernmost point of the Mediterranean is on the coast of the Gulf of Trieste near Monfalcone in northern Italy while

2516-525: The Mediterranean towards East Africa and Asia. This led to a preference for the Mediterranean countries and their ports like Trieste with direct connections to Central and Eastern Europe experienced a rapid economic rise. In the 20th century, the 1st and 2nd World Wars as well as the Suez Crisis and the Cold War led to a shift of trade routes to the European northern ports, which changed again towards

2590-516: The Mediterranean was cut off from the Atlantic and was partly or completely desiccated over a period of some 600,000 years during the Messinian salinity crisis before being refilled by the Zanclean flood about 5.3 million years ago. The Mediterranean Sea covers an area of about 2,500,000 km (970,000 sq mi), representing 0.7% of the global ocean surface, but its connection to

2664-417: 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

2738-406: The ages. The earliest advanced civilizations in the Mediterranean were the Egyptians and the Minoans , who traded extensively with each other. Other notable civilizations that appeared somewhat later are the Hittites and other Anatolian peoples , the Phoenicians , and Mycenean Greece . Around 1200 BC the eastern Mediterranean was greatly affected by the Bronze Age Collapse , which resulted in

2812-407: The area as generic Mediterranean Sea, in the Western Basin. It does not recognize the label Sea of Sardinia . Note 2: Thracian Sea and Myrtoan Sea are seas that are part of the Aegean Sea . Note 3: The Black Sea is not considered part of it. The International Hydrographic Organization defines the limits of the Mediterranean Sea as follows: Stretching from the Strait of Gibraltar in

2886-406: 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

2960-526: The deepest recorded point is 5,109 ± 1 m (16,762 ± 3 ft) in the Calypso Deep in the Ionian Sea . It lies between latitudes 30° and 46° N and longitudes 6° W and 36° E . Its west–east length, from the Strait of Gibraltar to the Gulf of Alexandretta , on the southeastern coast of Turkey , is about 4,000 kilometres (2,500 mi). The north–south length varies greatly between different shorelines and whether only straight routes are considered. Also including longitudinal changes,

3034-512: The destruction of many cities and trade routes. The most notable Mediterranean civilizations in classical antiquity were the Greek city states and the Phoenicians , both of which extensively colonized the coastlines of the Mediterranean. Darius I of Persia , who conquered Ancient Egypt, built a canal linking the Red Sea to the Nile, and thus the Mediterranean. Darius's canal was wide enough for two triremes to pass each other with oars extended and required four days to traverse. Following

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3108-430: 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

3182-441: 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

3256-642: 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

3330-420: The east), which is sometimes translated as "Western Sea". Another name was the "Sea of the Philistines ", ( Book of Exodus ), from the people inhabiting a large portion of its shores near the Israelites . In Modern Hebrew , it is called הים התיכון HaYam HaTikhon 'the Middle Sea'. In Classic Persian texts was called Daryāy-e Šām (دریای شام) "The Western Sea" or "Syrian Sea". In Modern Standard Arabic , it

3404-443: The entire Mediterranean. Once, most of the trade between Western Europe and the East was passing through the region , but after the 1490s the development of a sea route to the Indian Ocean allowed the importation of Asian spices and other goods through the Atlantic ports of western Europe. The sea remained strategically important. British mastery of Gibraltar ensured their influence in Africa and Southwest Asia. Especially after

3478-399: The flourishing of trade between Europe and the outremer region. Genoa, Venice and Pisa created colonies in regions controlled by the Crusaders and came to control the trade with the Orient. These colonies also allowed them to trade with the Eastern world. Though the fall of the Crusader states and attempts at banning of trade relations with Muslim states by the Popes temporarily disrupted

3552-435: 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

3626-422: 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

3700-436: The immediate coastline on all sides of the Mediterranean tends to have strong maritime moderation. The sea was an important route for merchants and travellers of ancient times, facilitating trade and cultural exchange between the peoples of the region. The history of the Mediterranean region is crucial to understanding the origins and development of many modern societies. The Roman Empire maintained nautical hegemony over

3774-588: The major ranges bordering Southern Europe. Total annual precipitation is significantly higher on the European part of the Mediterranean basin, especially near the Alps (the 'water tower of Europe') and other high mountain ranges. As a consequence, the river discharges of the Rhône and Po are similar to that of the Nile, despite the latter having a much larger basin. These are the only three rivers with an average discharge of over 1,000 m /s (35,000 cu ft/s). Among large natural fresh bodies of water are Lake Victoria (Nile basin), Lake Geneva (Rhône), and

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3848-414: The migrants and arrest the traffickers of immigrants. In 2015, more than one million migrants crossed the Mediterranean Sea into Europe. Italy was particularly affected by the European migrant crisis . Since 2013, over 700,000 migrants have landed in Italy, mainly sub-Saharan Africans. The Mediterranean Sea connects: The 163 km (101 mi) long artificial Suez Canal in the southeast connects

3922-435: The naval battles of Abukir (1799, Battle of the Nile ) and Trafalgar (1805), the British had for a long time strengthened their dominance in the Mediterranean. Wars included Naval warfare in the Mediterranean during World War I and Mediterranean theatre of World War II . With the opening of the lockless Suez Canal in 1869, the flow of trade between Europe and Asia changed fundamentally. The fastest route now led through

3996-428: The number of drowned refugees in the region as a direct result of the policies. An Azerbaijani official described the sea as "a burial ground ... where people die". Following the 2013 Lampedusa migrant shipwreck , the Italian government decided to strengthen the national system for the patrolling of the Mediterranean Sea by authorising " Operation Mare Nostrum ", a military and humanitarian mission in order to rescue

4070-418: 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

4144-474: The region when the Battle of Lepanto (1571) checked the power of the Ottoman Navy . This was the last naval battle to be fought primarily between galleys . The Barbary pirates of Northwest Africa preyed on Christian shipping and coastlines in the Western Mediterranean Sea. According to Robert Davis, from the 16th to 19th centuries, pirates captured 1 million to 1.25 million Europeans as slaves. The development of oceanic shipping began to affect

4218-572: 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

4292-461: 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

4366-468: The sea for centuries and is the only state to have ever controlled all of its coast. The countries surrounding the Mediterranean and its marginal seas in clockwise order are Spain , France , Monaco , Italy , Slovenia , Croatia , Bosnia and Herzegovina , Montenegro , Albania , Greece , Turkey , Syria , Lebanon , Israel , Palestine ( Gaza Strip ), Egypt , Libya , Tunisia , Algeria , and Morocco ; Cyprus and Malta are island countries in

4440-458: The sea. In addition, Northern Cyprus ( de facto state ) and two overseas territories of the United Kingdom ( Akrotiri and Dhekelia , and Gibraltar ) also have coastlines along the Mediterranean Sea. The drainage basin encompasses a large number of other countries, the Nile being the longest river ending in the Mediterranean Sea. The Ancient Egyptians called the Mediterranean Wadj-wr/Wadj-Wer/Wadj-Ur. This term (literally "great green")

4514-423: The shortest shipping route between the multinational Gulf of Trieste and the Libyan coastline of the Gulf of Sidra is about 1,900 kilometres (1,200 mi). The water temperatures are mild in winter and warm in summer and give name to the Mediterranean climate type due to the majority of precipitation falling in the cooler months. Its southern and eastern coastlines are lined with hot deserts not far inland, but

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4588-400: The south side of the Taurus Mountains . In Europe, the largest basins are those of the Rhône , Ebro , Po , and Maritsa . The basin of the Rhône is the largest and extends up as far north as the Jura Mountains , encompassing areas even on the north side of the Alps . The basins of the Ebro, Po, and Maritsa, are respectively south of the Pyrenees , Alps, and Balkan Mountains , which are

4662-421: The southern ports through European integration, the activation of the Silk Road and free world trade. In 2013, the Maltese president described the Mediterranean Sea as a "cemetery" due to the large number of migrants who drowned there after their boats capsized. European Parliament president Martin Schulz said in 2014 that Europe's migration policy "turned the Mediterranean into a graveyard", referring to

4736-599: The southernmost point is on the coast of the Gulf of Sidra near the Libyan town of El Agheila . Large islands in the Mediterranean include: The Alpine arc , which also has a great meteorological impact on the Mediterranean area, touches the Mediterranean in the west in the area around Nice . The typical Mediterranean climate has hot, dry summers and mild, rainy winters. Crops of the region include olives , grapes , oranges , tangerines , carobs and cork . The Mediterranean Sea includes 15 marginal seas : Note 1: The International Hydrographic Organization defines

4810-418: 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

4884-440: The term was later extended to the whole Mediterranean, it was also called Baḥr al-Maghrib ( بحر المغرب ) ("the Sea of the West"). A name that was used mainly for the western basin. In Turkish , it is the Akdeniz 'the White Sea'; in Ottoman, ﺁق دڭيز , which sometimes means only the Aegean Sea . The origin of the name is not clear, as it is not known in earlier Greek, Byzantine or Islamic sources. It may be to contrast with

4958-415: 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

5032-477: 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

5106-508: The trade in western Europe and brought it to a halt. However, the Norsemen developed the trade from Norway to the White Sea , while also trading in luxury goods from Spain and the Mediterranean. The Byzantines in the mid-8th century retook control of the area around the north-eastern part of the Mediterranean. Venetian ships from the 9th century armed themselves to counter the harassment by Arabs while concentrating trade of Asian goods in Venice. The Fatimids maintained trade relations with

5180-487: The trade relations between Western and Eastern Europe while disrupting trade routes with Eastern Asian Empires. This, however, had the indirect effect of promoting trade across the Caspian Sea . The export of grains from Egypt was re-routed towards the Eastern world . Products from East Asian empires, like silk and spices, were carried from Egypt under the Arab rule to ports like Venice and Constantinople by sailors and Jewish merchants. The Viking raids further disrupted

5254-412: The trade with the Orient, it however continued. Europe started to revive, however, as more organized and centralized states began to form in the later Middle Ages after the Renaissance of the 12th century . Ottoman power based in Anatolia continued to grow, and in 1453 extinguished the Byzantine Empire with the Conquest of Constantinople . Ottomans gained control of much of the eastern part sea in

5328-657: The west to the entrances to the Dardanelles and the Suez Canal in the east, the Mediterranean Sea is bounded by the coasts of Europe, Africa, and Asia and is divided into two deep basins: The drainage basin of the Mediterranean Sea is particularly heterogeneous and extends much further than the Mediterranean region. Its size has been estimated between 4,000,000 and 5,500,000 km (1,500,000 and 2,100,000 sq mi), depending on whether non-active parts (deserts) are included or not. The longest river ending in

5402-789: 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, 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

5476-734: Was the name given by the Ancient Egyptians to the semi-solid, semi-aquatic region characterized by papyrus forests to the north of the cultivated Nile delta, and, by extension, the sea beyond. The Ancient Greeks called the Mediterranean simply ἡ θάλασσα ( hē thálassa ; "the Sea") or sometimes ἡ μεγάλη θάλασσα ( hē megálē thálassa ; "the Great Sea"), ἡ ἡμετέρα θάλασσα ( hē hēmetérā thálassa ; "Our Sea"), or ἡ θάλασσα ἡ καθ’ ἡμᾶς ( hē thálassa hē kath’hēmâs ; "the sea around us"). The Romans called it Mare Magnum ("Great Sea") or Mare Internum ("Internal Sea") and, starting with

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