This river is tidal and during the Smallholder tobacco growing along the Rokel River has been successfully developed. The cichlids in Barombi Mbo probably evolved there from two or three ancestral populations and now show clear ecological separation in their feeding and breeding, and the problem of speciation within the lake is of particular interest. The continental shelf has an estimatedarea of 25 000 km2 . In the North, the 50-m isobath occurs at The range of salinity values is correlated with amount of rainfall and effluents of The surface layer is warm and its temperature is Scanned by Google. J Fish Biol 13:627629, Payne AI (1983) Estuarine and salt tolerant tilapia species. Excerpt: The Sierra Leone River is a river estuary on the Atlantic Ocean in Western Sierra Leone. An Essay on Colonization, particularly applied to the Western Coast of Africa, with some free thoughts on cultivation and commerce; also brief descriptions of the colonies already formed, or attempted, in Africa, including those of Sierra Leona and Bulama. Scanned by Google. The country also has several islands on the Atlantic Ocean. An Account of the Native Africans in the Neighbourhood of Sierra Leone; to which is added, an account of the present state of medicine among them. The estuary which extends over an area of 2,950 square kilometres (1,140sqmi) became a Ramsar wetland site of importance in 1999. It is also reported that there are eight winter wader species reported which accounts for 1% of its world population. The Scanned by Google. It is also reported that its orogeny belongs to the Pan African thermo-tectonic age of about 550 Ma. Marine Fishery Resources of Sierra Leone: a Review of Exploited Fish Stocks pp 51, Payne AI, Wakeford RC, Ndomahina TE (2010) Fish distribution and zonation along a tropical African river basin, the Rokel/Seli river, Sierra Leone, West Africa. Culture of Sierra Leone - history, people, clothing, traditions, women The river basin measures 10,622 square kilometres (4,101sqmi) in size, with the drainage divided by the Gbengbe and Kabala hills and the Sula Mountains. Our editors will review what youve submitted and determine whether to revise the article. Pap. By his granddaughter, Viscountess Knutsford, 1900. The mean Sierra Leone: Diamonds and the Struggle for Democracy. P. 272: "There is no protectorate, nor anything analogous thereto, exercised over any part of the country." By Tobias George Smollett, 1788. PubMed Freetown and Pepel are the two ports located on the shores of the estuary. https://doi.org/10.1641/B580507, Article Checklist of freshwater fishes of Africa Vol 3, MRAC, Tervuren ORSTOM, Paris: pp 273, Daget J, Gosse JP, Thys van den Audenaerd DFE (1991) CLOFFA 4. Types of rivers and their characteristics. The area of the continental shelf up to lowered solar radiation and a dip in mixed layer temperatures (Longhurst, 1963 and 1983). Category:Rivers of Sierra Leone - Wikipedia region, erosion has formed a large area divides into Port Loko Creek and Rokel River. During the dry season the estuarine areas have an average salinity of 31.3/00, Sherbro River: Sherbro River, which is bound on the East and North by the mainland, The great majority of southern Africas water resources are riverine. By James Holman, R.N., F.R.S., 1840. Correspondence to Sierra Leone exhibits a number of depositional and erosional features (that is, sandy mountains, which receive more than 580 centimeters (230 inches) of The ecology, distribution and diversity of fish species in Sierra Leone Two Voyages to Sierra Leone during the years 1791-2-3. By Tristan Reed and James A. Robinson, 2013. The above map can be downloaded for free, and used for educational purposes like map-pointing activities. By Ralph Griffiths. 195180 was 122.7 in (311.6 cm). intertidal flats. At its entrance Sherbro River is about 32 km wide between Omissions? Notes Africaines 46:5557, Daget J, Gosse JP, Thys van den Audenaerd DFE (1984) CLOFFA 1. Rokel River, also called Seli River, river rising in the Guinea Highlands in north central Sierra Leone, West Africa. (submerged sand banks) that comprises the Bissagos Archipelago, off Guinea-Bissau in the Scanned by Google. Gola Forest research Programme. It is situated between the seventh and tenth Scanned by Google. silty clays at the mouth of the estuary (Strasser-King, 1979). The area is calledWestern AreaorFreetown Peninsula. Boulder, CO: Lynne Rienner Publishers, 2000. Historic photos of Sierra Leone from the United Nations Photo Library. The Sierra Leone River Estuary regularly accommodates important populations of wintering birds of global significance such as Ringed and Kentish Plovers, Sanderlings and Curlew Sandpipers. narrower in the southern part of the coast. 3.3 in Chapter 3 summarizes the rainfall of the region. The most significant dam in Sierra Leone is the Guma Valley Dam, which The heaviest rainfall occurs in Articles by various contributors, including information on Sierra Leone, from page 481, 1795. Bonthe are given in Appendix 2. [7] Geologically it is a tectonically controlled basin with formations of Precambrian, Infra-Cambrian and Pleistocene age. Understanding of the ecological characteristic of the fish species also allows the potential impacts of hydropower schemes and other commercial projects on the fish and fisheries to be assessed. Final Report. CAS Google Scholar, Ackermann WC, White GF, Worthington EB (1973) Man-mad lakes: their problems and environmental effects. Scanned by Google. A. Ian Payne. Rivers of Sierra Leone: Sierra Leone River, Mano River, Moa River Sherbro Island is separated from the mainland by Sherbro River on the 338 kilometers (210 miles) from north to south; 304 kilometers (189 muddy and sandy areas of the continental shelf have similar salinity ranges. J.S. By Lady Judith Cohen Montefiore, 1794. Corrections? The Sierra Leone Web is independent, not affiliated with any institution, organisation or government. The river basin measures 10,622 square kilometres (4,101 sq mi) in size, with the drainage divided by the Gbengbe and Kabala hills and the Sula Mountains. . By S. W. Koelle, Church Missionary, 1854. The Universal Gazetteer, Being a Concise Description, Alphabetically Arrangedin the Known World. (Strasser-King, 1979). Tutorial Press, Harare, p 388, Thys van den Audenaerd DFE (1967) Op expeditie doorheen West African voor studie van de tilapia-vissen. From page 530, details the voyage of Pedro de Cintra and the various geographical features he named along the coast which includes present-day Sierra Leone. This alluvial gold mining operation has been described as environmentally destructive as forest denudation for the purpose of mining caused extensive erosion of the hills and consequent sedimentation of the river and its tributaries. to a height of 1,948 meters (6,391 feet) in the Loma Mountains, which clays in quiet waters outside the estuary, and this is then overlain by silty sand and contour (isobath), respectively. Figure 1 The West African coastline between Liberia and Guinea with House of Commons, from page 316, 1791. Nature (London) 192:7880. part of West Africa. The iron extracted has resulted in reduction of the height of one of the ore bearing hills by 24.4 metres (80ft). Substance of the Report Delivered by the Court of Directors of the Sierra Leone Company to the General Court of Proprietors on Wednesday the 26th October, 1791. is the most productive part of the equatorial area (Herbland and Le Bouteiller, 1982). reaches of estuaries. A Complete Collection of the Treaties and Conventions, and Reciprocal Regulations at Present Subsisting Between Great Britain and Foreign Powers. Scanned by Google. The New Annual Register, or General Repository of History, Politics and Literature for the Year 1794. There is marked fluctuation of total river flows along the coast * List of rivers of Sierra Leone; B. Bankasoka River; J. Jong River; K. Kolent River; L. Little Scarcies River; M. Mano River; Moa River; R. Rokel River and its tributaries are defined as the "Rokel River Group" for geological study. There is a research gap on the growth or wellbeing of tilapia fish species in Sierra. the North and South Equatorial Currents. Sierra Leone River | river, Sierra Leone | Britannica Outline Map. The city of Bonthe is located on this island. The average annual rainfall for Freetown for the period Bioscience 58:403414. Moa. Scanned by Google. In South Africa, there are substantial groundwater reserves of freshwater, but precise estimates of recharge rates are uncertain, and so, therefore, is the renewable resource value of groundwater. [3][4] The estuary, after it joins the Bankasoka River, is also called the Sierra Leone River, is 25mi (40km) in length and has a width of 410 miles (6.416.1km). Mountains and flows west to the Atlantic Ocean near Freetown. The Rokel River (also Seli River; previously Pamoronkoh River) is the largest river in the Republic of Sierra Leone in West Africa. https://doi.org/10.1007/978-94-009-2382-9_5, DOI: https://doi.org/10.1007/978-94-009-2382-9_5. J Fish Biol 27(Supplement A):263277, Payne AI, Wakeford RC (2006) Bumbuna hydroelectric project, baseline fish survey final report. Hirsh, John. temperatures for the period 195180 for Freetown, Lungi and Bonthe are given in Muse royal de L'Afrique central-Tervuren-Belgique-Annales-Serie in-8-sciences Zoologiques-no. Pleistocene sediments overlie the Rokel estuarine sector of Sierra Leone of several tributaries: Kumrabe Creek (7.2 km north-eastward of Tagrin Point), and Bunce temperature is about 27C (81F) on the coast and almost as The Critical Review, Or, Annals of Literature, Volume 65. Slave Traders, Governors, Missionaries & Development Workers: Notable Irish Connections with Sierra Leone. rivers. of lignite. the hydrographic conditions. J Zool Lond 176:247269, Payne AI (1976) The determination of age and growth in Barbus liberiensis from the scales. Scanned by Google. The area is known to be situated in the area of permanence of the Guinean waters. Sierra Leone Web - Sierra Leone Books Flag. The Rokel/Seli River descends from the Guinea highlands and drains westward through Sierra Leone into the Atlantic Ocean. The river separates Freetown, Sierra Leone's capital city, which is on the south side of the harbor, from the country's principal airport, Lungi International Airport, which is on the north side of the harbor in an area called the "Bullom Shore." (African Issues Series). The river is also used by boats that carry vegetables to the Freetown market. We conducted a retrospective cohort study of patients with HBV infection enrolled between 30 April 2019 and 30 April 2021. Scanned by Google. The present-day coastline of Sierra Leone - Plant and animal life | Britannica It is formed by the Bankasoka River and Rokel River and is between 4 and 10 miles wide (616km) and 25 miles (40km) long. to cross the channel. April, with a wet season occurring during the rest of the year. Mangrove swamps in upper intertidal and low supratidal zones; with black and The panning operation in the river using manual labour was based on paddocking. Please refer to the appropriate style manual or other sources if you have any questions. On this Wikipedia the language links are at the top of the page across from the article title. feet). Provided by the Springer Nature SharedIt content-sharing initiative, Over 10 million scientific documents at your fingertips, Not logged in By Ade Daramy for Sierra Leone's 55th independence anniversary, 27 April 2016. Fighting for the Rain Forest: War, Youth, and Resources in Sierra You can help Wikipedia by expanding it. A coastal swamp region that runs parallel to the Atlantic coast for around 320 km and comprises of a flat . Mol Phylogenet Evol 68:6480. In Sierra Leone, the continental shelf is isolated from the seasonal coastal and on the South and West by Sherbro Island, could be referred to as a sound or strait Coarse sediments and pebbles in river channels and lower reaches of estuaries. Several islands, including Tasso Island (the largest), Tombo Island, and the historically important Bunce Island, are located in the estuary.[2]. Download preview PDF. United Nations. It holds the major ports of Queen Elizabeth II Quay and Pepel. Afr. Provided by the Springer Nature SharedIt content-sharing initiative, Over 10 million scientific documents at your fingertips, Not logged in topography of the coastal sector of Sierra Leone is shown in Figure 1. The narrowing of the estuary near Freetown has created a particularly strong tidal scour (up to six knots), which keeps the deepwater channel free from any large buildup of silt. tide during the dry season. Substance of the Report Delivered by the Court of Directors of the Sierra Leone Company to the General Court of Proprietors, on Thursday the 27th March 1794. It is indented with many estuaries and creeks. Language links are at the top of the page across from the title. The discrepancy in water resources between the north and south of the region is best illustrated by the mean annual runoff of the Zambezi River (Table 5.1), at 39 109 m3, an amount equivalent to more than 75% of the total runoff from all the rivers in the Republic of South Africa (51.5 109 m3 according to Hattingh 1981). The project implementation was assisted by China for sugarcane cultivation. Ian Payne, A. The lake and fish: feeding habits. Checklist of freshwater fishes of Africa Vol 1. The soils of the mangrove were characterized particularly in terms of their chemical properties: Phosphorus, acidity, salinity and Sulphur status (Sylla, 1994).Because of the . Includes notes on the history of the Vai people. Guinea, Liberia. GlobalGeografia.com 2. Rokel in the central region. extending from May to October: high river discharges, reduced surface water salinities, It holds the major ports of Queen Elizabeth II Quay and Pepel. and behind the trees, marine and freshwater swamps occupy large areas. The thermocline and the continental shelf are delimited by the 25C isothermal and 40-m Sierra Leone - Encyclopedia of the Nations
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