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80-426: The drainage basin of Kambaniru covers an area of 111,000 hectare, comprising 34 villages and 8 administrative districts. The area suffers from heavy degradation, requiring massive rehabilitation. Although quite low in water during the dry season, the river floods the banks yearly during the wet season, due to the minimal flood control programs. The lack of bridges forces elementary school students of Bidipraing to cross

160-484: 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

240-414: 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

320-454: 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

400-540: 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

480-727: A relatively shallow sea compared to other bodies of water. The pressure of the South American Plate to the east of the Caribbean causes the region of the Lesser Antilles to have high volcanic activity. A very serious eruption of Mount Pelée in 1902 caused many casualties. The Caribbean sea floor is also home to two oceanic trenches : the Cayman Trench and the Puerto Rico Trench , which put

560-571: A sea route to Asia. At that time, the Americas were generally unknown to most Europeans, although they had been visited in the 10th century by the Vikings . Following Columbus's discovery of the islands, the area was quickly colonized by several Western cultures (initially Spain , then later England , the Dutch Republic , France , Courland and Denmark ). Following the colonization of

640-621: A year visit the area, including (in 1991–1992) about 8 million cruise ship tourists. Tourism based upon scuba diving and snorkeling on coral reefs of many Caribbean islands makes a major contribution to their economies. These three form the SSS islands that with the ABC islands comprise the Dutch Caribbean , of which the BES islands are not direct Kingdom constituents but subsumed with

720-789: Is bounded by the Greater Antilles to the north from Cuba to Puerto Rico , the Lesser Antilles to the east from the Virgin Islands to Trinidad and Tobago , South America to the south from the Venezuelan coastline to the Colombian coastline , and Central America and the Yucatán Peninsula to the west from Panama to Mexico . The geopolitical region centered around the Caribbean Sea, including

800-478: Is called coral bleaching , and can lead to the devastation of large areas of reef. Over 42% of corals are completely bleached, and 95% are experiencing some type of whitening. Historically the Caribbean is thought to contain 14% of the world's coral reefs. The habitats supported by the reefs are critical to such tourist activities as fishing and diving , and provide an annual economic value to Caribbean nations of US$ 3.1–4.6 billion. Continued destruction of

880-707: Is concentrated around coral reefs where there is little variation in water temperature, purity and salinity. Leeward side of lagoons provide areas of growth for sea grasses . Turtle grass ( Thalassia testudinum ) is common in the Caribbean as is manatee grass ( Syringodium filiforme ) which can grow together as well as in fields of single species at depths up to 20 m (66 ft). Another type shoal grass ( Halodule wrightii ) grows on sand and mud surfaces at depths of up to 5 m (16 ft). In brackish water of harbours and estuaries at depths less than 2.5 m (8 ft 2 in) widgeongrass ( Ruppia maritima ) grows. Representatives of three species belonging to

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960-411: Is endangered. The Antilles along with Central America lie in the flight path of migrating birds from North America so the size of populations is subject to seasonal fluctuations. Parrots and bananaquits are found in forests. Over the open sea can be seen frigatebirds and tropicbirds . The Caribbean region has seen a significant increase in human activity since the colonization period. The sea

1040-484: Is endangered. The rhinoceros iguana from the island of Hispaniola which is shared between Haiti and the Dominican Republic is also endangered. The region has several types of sea turtle ( loggerhead , green turtle , hawksbill , leatherback turtle , Atlantic ridley and olive ridley ). Some species are threatened with extinction. Their populations have been greatly reduced since the 17th century –

1120-445: Is one of the largest oil production areas in the world, producing approximately 170 million tons per year. The area also generates a large fishing industry for the surrounding countries, accounting for 500,000 tonnes (490,000 long tons; 550,000 short tons) of fish a year. Human activity in the area also accounts for a significant amount of pollution . The Pan American Health Organization estimated in 1993 that only about 10% of

1200-487: 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

1280-447: 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

1360-614: 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

1440-694: Is the national flower of Jamaica and the Bayahibe rose ( Pereskia quisqueyana ) which is the national flower of the Dominican Republic and the ceiba which is the national tree of both Puerto Rico and Guatemala . The mahogany is the national tree of the Dominican Republic and Belize . The caimito ( Chrysophyllum cainito ) grows throughout the Caribbean. In coastal zones there are coconut palms and in lagoons and estuaries are found thick areas of black mangrove and red mangrove ( Rhizophora mangle ). In shallow water flora and fauna

1520-400: Is the second most polluted sea. Pollution (in the form of up to 300,000 tonnes of solid garbage dumped into the Caribbean Sea each year) is progressively endangering marine ecosystems, wiping out species, and harming the livelihoods of the local people, which is primarily reliant on tourism and fishing. KfW took part in a €25.7 million funding agreement to eliminate marine trash and boost

1600-713: 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

1680-478: The Caribbean ; only one extant species is not endangered. There are 500 species of reptiles (94% of which are endemic ). Islands are inhabited by some endemic species such as rock iguanas and American crocodile . The blue iguana , endemic to the island of Grand Cayman , is endangered. The green iguana is invasive to Grand Cayman . The Mona ground iguana which inhabits the island of Mona, Puerto Rico ,

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1760-828: 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,

1840-633: The Gulf of Gonâve , the Gulf of Venezuela , the Gulf of Darién , Golfo de los Mosquitos , the Gulf of Paria and the Gulf of Honduras . The Caribbean Sea has the world's second-largest barrier reef , the Mesoamerican Barrier Reef . It runs 1,000 km (620 mi) along the Mexico, Belize , Guatemala , and Honduras coasts. The name Caribbean derives from the Caribs , one of

1920-714: 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

2000-501: The circular economy in the Caribbean's Small Island Developing States . The project "Sustainable finance methods for marine preservation in the Caribbean" will assist remove solid waste and keep it out of the marine and coastal environment by establishing a new facility under the Caribbean Biodiversity Fund (CBF). Non-governmental organizations, universities, public institutions, civil society organizations, and

2080-608: 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. Caribbean Sea The Caribbean Sea is a sea of the North Atlantic Ocean in the tropics of the Western Hemisphere , located south of the Gulf of Mexico and southwest of the Sargasso Sea . It

2160-901: The Caribbean Islands and the Central American coast. Among them stands out the Belize Barrier Reef , with an area of 963 km (372 sq mi), which was declared a World Heritage Site in 1996. It forms part of the Great Mayan Reef (also known as the MBRS ) and, being over 1,000 km (600 mi) in length, is the world's second longest. It runs along the Caribbean coasts of Mexico , Belize , Guatemala and Honduras . Since 2005 unusually warm Caribbean waters have been increasingly threatening Caribbean coral reefs . Coral reefs support some of

2240-587: The Caribbean Sea is estimated to be between 160 and 180 million years and was formed by a horizontal fracture that split the supercontinent called Pangea in the Mesozoic Era . It is assumed the proto-caribbean basin existed in the Devonian period and in the early Carboniferous movement of Gondwana to the north and its convergence with the Euramerica basin decreased in size. The next stage of

2320-464: The Caribbean Sea's formation began in the Triassic . Powerful rifting led to the formation of narrow troughs, stretching from modern Newfoundland to the Gulf of Mexico's west coast, forming siliciclastic sedimentary rocks . In the early Jurassic due to powerful marine transgression , water broke into the present area of the Gulf of Mexico creating a vast shallow pool. Deep basins emerged in

2400-604: The Caribbean during the Middle Jurassic rifting . The emergence of these basins marked the beginning of the Atlantic Ocean and contributed to the destruction of Pangaea at the end of the late Jurassic . During the Cretaceous the Caribbean acquired a shape close to today. In the early Paleogene due to marine regression the Caribbean became separated from the Gulf of Mexico and the Atlantic Ocean by

2480-450: The Caribbean islands, the Caribbean Sea became a busy area for European-based marine trading and transports. This commerce eventually attracted pirates such as Samuel Bellamy and Blackbeard . As of 2015 the area is home to 22 island territories and borders 12 continental countries . The International Hydrographic Organization defines the limits of the Caribbean Sea as follows: Although Trinidad and Tobago and Barbados are on

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2560-531: The Caribbean itself. The Caribbean hurricane season as a whole lasts from June through November, with the majority of hurricanes occurring during August and September. On average around nine tropical storms form each year, with five reaching hurricane strength. According to the National Hurricane Center 385 hurricanes occurred in the Caribbean between 1494 and 1900. The region has a high level of biodiversity and many species are endemic to

2640-1053: The Caribbean marine life, such as Caribbean Conservation Corporation which seeks to study and protect sea turtles while educating others about them. In connection with the foregoing, the Institute of Marine Sciences and Limnology of the National Autonomous University of Mexico , conducted a regional study, funded by the Department of Technical Cooperation of the International Atomic Energy Agency , in which specialists from 11 Latin American countries (Colombia, Costa Rica, Cuba, Guatemala, Haiti, Honduras, Mexico, Nicaragua, Panama, Dominican Republic, Venezuela) plus Jamaica participated. The findings indicate that heavy metals such as mercury, arsenic, and lead, have been identified in

2720-412: The Caribbean there is industrial catching of lobster and sardines (off the coast of Yucatán Peninsula ). There are 90 species of mammals in the Caribbean including sperm whales , humpback whales and dolphins . The island of Jamaica is home to seals and manatees . The Caribbean monk seal which lived in the Caribbean is considered extinct. Solenodons and hutias are mammals found only in

2800-603: The Caribbean through the Anegada Passage between the Lesser Antilles and the Virgin Islands and the Windward Passage between Cuba and Haiti . The Yucatán Channel between Mexico and Cuba links the Gulf of Mexico with the Caribbean. The deepest points of the sea lie in Cayman Trough with depths reaching approximately 7,686 m (25,220 ft). Despite this, the Caribbean Sea is considered

2880-666: The Caribbean, 600 species of birds have been recorded, of which 163 are endemic such as todies , Fernandina's flicker and palmchat . The American yellow warbler is found in many areas, as is the green heron . Of the endemic species 48 are threatened with extinction including the Puerto Rican amazon , and the Zapata wren . According to Birdlife International in 2006 in Cuba 29 species of bird are in danger of extinction and two species officially extinct. The black-fronted piping guan

2960-417: The Caribbean. The vegetation of the region is mostly tropical but differences in topography , soil and climatic conditions increase species diversity . Where there are porous limestone terraced islands these are generally poor in nutrients. It is estimated that 13,000 species of plants grow in the Caribbean of which 6,500 are endemic . For example, guaiac wood ( Guaiacum officinale ), the flower of which

3040-623: 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

3120-468: The area at a high risk of earthquakes . Underwater earthquakes pose a threat of generating tsunamis which could have a devastating effect on the Caribbean islands. Scientific data reveals that over the last 500 years, the area has seen a dozen earthquakes above 7.5 magnitude. Most recently, a 7.1 earthquake struck Haiti on January 12, 2010. The hydrology of the sea has a high level of homogeneity. Annual variations in monthly average water temperatures at

3200-468: The area is tropical , varying from tropical rainforest in some areas to tropical savanna in others. There are also some locations that are arid climates with considerable drought in some years. Rainfall varies with elevation, size, and water currents (cool upwelling keep the ABC islands arid). Warm, moist trade winds blow consistently from the east, creating both rainforest and semi-arid climates across

3280-406: 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

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3360-523: The coastal zone of the Caribbean Sea. Analysis of toxic metals and hydrocarbons is based on the investigation of coastal sediments that have accumulated less than 50 meters deep during the last hundred and fifty years. The project results were presented in Vienna in the forum "Water Matters", and the 2011 General Conference of said multilateral organization. After the Mediterranean, the Caribbean Sea

3440-498: The corporate sector are all eligible for financing. The project is estimated to prevent and remove at least 15 000 tonnes of marine trash, benefiting at least 20 000 individuals. The climate of the Caribbean is driven by the low latitude and tropical ocean currents that run through it. The principal ocean current is the North Equatorial Current , which enters the region from the tropical Atlantic . The climate of

3520-430: 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

3600-441: 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

3680-697: 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

3760-411: The driest is August, with 2 mm rainfall. In 1963 Ms. Mathilda Taka (Mrs. Daniswan Anwar) composed a song about this river titled "Kambaniru" which was famous in the 1960s. 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

3840-857: 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

3920-488: The genus Halophila , ( Halophila baillonii , Halophila engelmannii and Halophila decipiens ) are found at depths of up to 30 m (98 ft) except for Halophila engelmani which does not grow below 5 m (16 ft) and is confined to the Bahamas , Florida , the Greater Antilles and the western part of the Caribbean. Halophila baillonii has been found only in the Lesser Antilles . Marine biota in

4000-583: 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 ,

4080-435: 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

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4160-781: 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

4240-417: 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

4320-424: The land of Cuba and Haiti . The Caribbean remained like this for most of the Cenozoic until the Holocene when rising water levels of the oceans restored communication with the Atlantic Ocean. The Caribbean's floor is composed of sub-oceanic sediments of deep red clay in the deep basins and troughs. On continental slopes and ridges calcareous silts are found. Clay minerals have likely been deposited by

4400-496: The mainland river Orinoco and the Magdalena River . Deposits on the bottom of the Caribbean Sea and the Gulf of Mexico have a thickness of about 1 km (0.62 mi). Upper sedimentary layers relate to the period from the Mesozoic to the Cenozoic (250 million years ago) and the lower layers from the Paleozoic to the Mesozoic . The Caribbean seafloor is divided into five basins separated from each other by underwater ridges and mountain ranges. Atlantic Ocean water enters

4480-403: The most diverse marine habitats in the world, but they are fragile ecosystems. When tropical waters become unusually warm for extended periods of time, microscopic plants called zooxanthellae , which are symbiotic partners living within the coral polyp tissues, die off. These plants provide food for the corals and give them their color. The result of the death and dispersal of these tiny plants

4560-409: 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

4640-412: The northern Atlantic as the Guiana Current and part of the North Equatorial Current enter the sea on the east. On the western side of the sea, the trade winds influence a northerly current which causes an upwelling and a rich fishery near Yucatán . The Caribbean is home to about 9% of the world's coral reefs , covering about 50,000 km (19,000 sq mi), most of which are located off

4720-438: The northern area of Sumba with predominantly tropical savanna climate (designated as As in the Köppen-Geiger climate classification). The annual average temperature in the area is 27 °C. The warmest month is October, when the average temperature is around 31 °C, and the coldest is June, at 24 °C. The average annual rainfall is 1203 mm. The wettest month is December, with an average of 257 mm rainfall, and

4800-434: The northern tip of Yucatán Tropical cyclones are a threat to the nations that rim the Caribbean Sea. While landfalls are infrequent, the resulting loss of life and property damage makes them a significant hazard to life in the Caribbean. Tropical cyclones that impact the Caribbean often develop off the West coast of Africa and make their way west across the Atlantic Ocean toward the Caribbean, while other storms develop in

4880-439: The number of green turtles has declined from 91 million to 300,000 and hawksbill turtles from 11 million to less than 30,000 by 2006. All 170 species of amphibians that live in the region are endemic. The habitats of almost all members of the toad family, poison dart frogs , tree frogs and leptodactylidae (a type of frog) are limited to only one island. The Golden coqui is in serious threat of extinction. In

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4960-464: The numerous islands of the West Indies and adjacent coastal areas in the mainland of the Americas , is known as the Caribbean . The Caribbean Sea is one of the largest seas on Earth and has an area of about 2,754,000 km (1,063,000 sq mi). The sea's deepest point is the Cayman Trough , between the Cayman Islands and Jamaica , at 7,686 m (25,217 ft) below sea level . The Caribbean coastline has many gulfs and bays :

5040-418: 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

5120-511: The reefs could severely damage the region's economy. A Protocol of the Convention for the Protection and Development of the Marine Environment of the Wider Caribbean Region came in effect in 1986 to protect the various endangered marine life of the Caribbean through forbidding human activities that would advance the continued destruction of such marine life in various areas. Currently this protocol has been ratified by 15 countries. Also, several charitable organisations have been formed to preserve

5200-506: The region have representatives of both the Indian and Pacific oceans which were caught in the Caribbean before the emergence of the Isthmus of Panama four million years ago. In the Caribbean Sea there are around 1,000 documented species of fish, including sharks ( bull shark , tiger shark , silky shark and Caribbean reef shark ), flying fish , giant oceanic manta ray , angel fish , spotfin butterflyfish , parrotfish , Atlantic Goliath grouper , tarpon and moray eels . Throughout

5280-451: The region remained undisputed during the first century of European colonization. From the 16th century, Europeans visiting the Caribbean region distinguished the "South Sea" (the Pacific Ocean south of the isthmus of Panama) from the "North Sea" (the Caribbean Sea north of the same isthmus). The Caribbean Sea had been unknown to the populations of Eurasia until after 1492 when Christopher Columbus sailed into Caribbean waters to find

5360-430: The region's dominant native people at the time of European contact during the late 15th century . After Christopher Columbus landed in The Bahamas in 1492 and later discovered some of the islands in The Caribbean, the Spanish term Antillas applied to the lands; stemming from this, the Sea of the Antilles became a common alternative name for the "Caribbean Sea" in various European languages. Spanish dominance in

5440-443: The region. The tropical rainforest climates include lowland areas near the Caribbean Sea from Costa Rica north to Belize , as well as the Dominican Republic and Puerto Rico , while the more seasonal dry tropical savanna climates are found in Cuba , northern Venezuela , and southern Yucatán, Mexico . Arid climates are found along the extreme northern coast of Venezuela out to the islands including Aruba and Curaçao , as well as

5520-572: 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

5600-461: 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

5680-410: The river width of 65 metres and the depth of 1.2 metres daily to go to school in the village of Kiritanah, Kambera. Kambaniru Dam was finished on 8 September 1992, located 10 km from the city of Waingapu, is the biggest dam in the regency, providing water to 1,440 hectares of rice fields in Mauliru, Kawangu and Kambaniru. The dam is located in the village of Malumbi, Kambera. The river flows along

5760-472: The same continental shelf, they are considered to be in the Atlantic Ocean rather than in the Caribbean Sea. The Caribbean Sea is an oceanic sea on the Caribbean Plate . The Caribbean Sea is separated from the ocean by several island arcs of various ages. The youngest stretches from the Lesser Antilles to the Virgin Islands to north of Trinidad and Tobago , which is in the Atlantic. This arc

5840-451: The seawater is about 3.6%, and its density is 1,023.5–1,024.0 kg/m (63.90–63.93 lb/cu ft). The surface water color is blue-green to green . The Caribbean's depth in its wider basins and deep-water temperatures are similar to those of the Atlantic. Atlantic deep water is thought to spill into the Caribbean and contribute to the general deep water of its sea. The surface water (30 m; 100 ft) acts as an extension of

5920-540: The sewage from the Central American and Caribbean Island countries is properly treated before being released into the sea. The region has been famous for its rum production - the drink is first mentioned in records from Barbados in around 1650, although it was likely to have been produced beforehand across the other islands. The Caribbean region supports a large tourism industry. The Caribbean Tourism Organization calculates that about 12 million people

6000-418: 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

6080-410: The surface do not exceed 3 °C (5.4 °F). Over the past 50 years, the Caribbean has gone through three stages: cooling until 1974, a cold phase with peaks during 1974–1976 and 1984–1986, and finally a warming phase with an increase in temperature of 0.6 °C (1.1 °F) per year. Virtually all temperature extremes were associated with the phenomena of El Niño and La Niña . The salinity of

6160-415: 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

6240-477: 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

6320-610: 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

6400-706: Was formed by the collision of the South American Plate with the Caribbean Plate . It included active and extinct volcanoes such as Mount Pelee , the Quill on Sint Eustatius in the Caribbean Netherlands , La Soufrière in Saint Vincent and the Grenadines and Morne Trois Pitons on Dominica . The larger islands in the northern part of the sea Cuba , Hispaniola , Jamaica and Puerto Rico lie on an older island arc. The geological age of

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