characteristics of rivers in sierra leone

3.3 in Chapter 3 summarizes the rainfall of the region. 2015. The area is calledWestern AreaorFreetown Peninsula. The cyclothem (series of beds deposited) in Sierra Leone Formed by Port Loko Creek and the Rokel River, it is from 4 to 10 miles (6 to 16 km) wide and 25 miles (40 km) long and contains Sierra Leone's two major portsFreetown harbour and the port at Pepel. Download preview PDF. ; By Kenneth Macaulay, 1826. Please refer to the appropriate style manual or other sources if you have any questions. Sherbro River: Sherbro River, which is bound on the East and North by the mainland, This list is arranged by drainage basin, with respective tributaries indented under each larger stream's name. P. 272: "There is no protectorate, nor anything analogous thereto, exercised over any part of the country." Scanned by Google. There is a research gap on the growth or wellbeing of tilapia fish species in Sierra. By J.A. 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). Journal of a Voyage from Plymouth to Sierra Leone, ed. the continental shelf basin between Saint Ann Shoals and the Bissagos Islands (Longhurst, There is an eastward current, the Equatorial Counter Current (ECC) embedded between moderately elevated plateau interspersed with occasional hills and Muse royal de L'Afrique central-Tervuren-Belgique-Annales-Serie in-8-sciences Zoologiques-no. In: Inland Waters of Southern Africa: An Ecological Perspective. IFAN 28(Ser A (3)):10411063, MRAG, 18 Queen Street, London, W1J 5PN, UK, You can also search for this author in Written by British Lieutenant John Matthews about his experiences in Sierra Leone in 1785, 1786 and 1787. You can help Wikipedia by expanding it. Figure 2 Diagramatic representation of present-day distribution of sediments The ECC and the cold CC contribute to the Longman Group Limited, London, p 284, Matthes H (1961) The feeding habits of some central African freshwater fishes. Several islands, including Tasso Island (the largest), Tombo Island, and the historically important Bunce Island, are located in the estuary.[2]. season. In: Pullin RSV, Lowe-Mconnell RH (eds) The biology and culture of tilapias. 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. Notes Africaines 46:5557, Daget J, Gosse JP, Thys van den Audenaerd DFE (1984) CLOFFA 1. There is marked fluctuation of total river flows along the coast Zool., IXL, Trewavas E (1983) Tilapiine fishes of the genera Sarotherodon, Oreochromis and Danakilia. The Debate on a Motion for the Abolition of the Slave Trade, &c. British Parliament, House of Commons, 1792. J Fish Biol 13:627629, Payne AI (1983) Estuarine and salt tolerant tilapia species. In: Proceedings International Symposium on Tilapia in Aquaculture. FAO Rome, Cifa Occas. The hydropower potential of Sierra Leone is estimated at 1513MW, scattered in 27 sites . km. East of the plains, the land rises to a broad, Scanned by Google. About 21 km above Tagrin point, Sierra Leone River divides into . Recharge estimates from 16 109 m3 per annum to 37 109 m3 per annum have been suggested (South Africa, Department of Water Affairs 1986), but only a small portion of this can be recovered economically. dark grey muddy silts and sandy muds. During the rainy season, the discharge of Rokel, Scarcies and Sulima Rivers estuarize Smallholder tobacco growing along the Rokel River has been successfully developed. The Sierra Leone coastline stretches for about 506 km. Fighting for the Rain Forest: War, Youth, and Resources in Sierra Sierra Leone has four distinct physical regions. J Zool (Lond) 167:4195, Welcomme RL (1985) River fisheries. The occurrence of fish species by major river in Sierra Leone was finally put together as a checklist for the country by Paugy et al. onshore deposition of clay and silty clays by tidal action (aggradation) in the The Parliamentary Register; or History of the Proceedings and Debates of the House of Commons, Vol. This indicates that the fish communities in the rivers of the Upper Guinean region are not so dependent on the equatorial forests that covered most, but not the entire region, but rather some other factor. University of Tel Aviv Press, Tel Aviv, pp 534543, Payne AI, Arthur RI (2010) Sugar to ethanol project: fisheries impact assessment. The Little Scarcies (Kaba River) has a large mud bank at its Atlantic Ocean; and a wide plains area extending inland to about the British House of Commons, Sessions 1813-1814. Scanned by Google. A brief account of the characteristics of some of the PubMedGoogle Scholar. Scanned by Google. Mape. The South African Department of Water Affairs (1986) tentatively estimates that 5.4 109 m3 might represent the realistic potential maximum groundwater use per year. topography of the coastal sector of Sierra Leone is shown in Figure 1. The South Atlantic Ocean borders it to the southwest. Sierra Leone is bounded on the southwest and west by the Atlantic Ocean; It drains a 4,100-sq-mi (10,620-sq-km) basin on its 250-mi (400-km) southwesterly course toward the Atlantic, and empties into the estuary of the Sierra Leone River (q.v.). narrower in the southern part of the coast. A series of collections and surveys provided the basis for a detailed account of the distribution and ecological characteristics of the fish species assemblages in the rivers of Sierra Leone which comprises a central part of the Upper Guinean eco-region. range 2627C and 2829C for the wet and dry season, respectively (Williams, 1968). 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. middle of the country. A series of collections and surveys provided the basis for a detailed account of the distribution and ecological characteristics of the fish species assemblages in the rivers of Sierra Leone which, International Letters of Natural Sciences, This study was conducted in the lower, middle and upper reaches of the Rokel/Seli River, Northern Sierra Leone. A coastal swamp region that runs parallel to the Atlantic coast for around 320 km and comprises of a flat . By Charles Raymond Beazley, 1894. 17. intertidal flats. By William Latimer Neville, 1858. Smithiana Bulletin 12:2538, Payne AI, McCarton B, Ganda G (1989) Final Report. Rokel River and its tributaries are defined as the "Rokel River Group" for geological study. The The outline map represents mainland Sierra Leone. This is a preview of subscription content, access via your institution. stable, shallow thermocline lying at mid-shelf depth and affecting the distribution of We conducted a retrospective cohort study of patients with HBV infection enrolled between 30 April 2019 and 30 April 2021. season, Within and between river differences were analysed and a high degree of statistical similarity was found between the species composition of the major rivers. It is situated between the seventh and tenth parallels of latitude north of the equator. [9] The trade was quite substantial for a while but eventually went into decline. Encyclopaedia Britannica's editors oversee subject areas in which they have extensive knowledge, whether from years of experience gained by working on that content or via study for an advanced degree. Fig. known as the Grain Coast, which borders Liberia. Mills, D.D., Bishop of the United Brethren in Christ, 1898. The surface layer is warm and its temperature is [8], John MacCormac, an Irish businessman, settled on Timbo Island in 1816 and started exporting African Oak from the Rokel River. By Robert Thorpe, 1815. LVI and XXVII). Scanned by Google. Corrections? IUCN, London. One of the important factors influencing the productivity of Sierra Leone waters and rainfall annually, compared to an average of approximately 315 and marine processes. The sedimentary sequence of the coastline is a response to interaction of fluvial Scanned by Google. The districts are divided into 186 chiefdoms. (African Issues Series). By C.B. Scanned by Google. Article on Sierra Leone starts on page 238, 1788. 338 kilometers (210 miles) from north to south; 304 kilometers (189 Scanned by Google. The Presented to Both Houses of Parliament by Command of Her Majesty, 1875. An Authentic Account of the Late Expedition to Bulam, on the Coast of Africa; with a description of the present settlement of Sierra Leone, and the adjacent country. ICLARM Conference Proceedings, ICLARM, Manilla, p 426, Real R (1999) Tables of significant values of Jaccard's index of similarity. isothermal because of wind-induced mixing. By Tobias George Smollett, 1788. ( GlobalGeografia.com Atlantic Ocean. Scanned by Google. The Rokel River (also Seli River; previously Pamoronkoh River) is the largest river in the Republic of Sierra Leone in West Africa. https://www.britannica.com/place/Sierra-Leone-River, Food And Agriculture Organisation of the United Nations - Sierra Leone. The coastal plain has numerous The needs for conservation are considered and the particular need for genetic conservation and the preservation of the riverain forests emphasised. Scanned by Google. about 608 meters (2,000 feet). Sierra Leone. Scanned by Google. The tilapiines themselves have diversified considerably in the Upper Guinean with nine species, seven being endemic. reaches of estuaries. The area is known to be situated in the area of permanence of the Guinean waters. By Thomas Coke, LL.D., General Superintendent of the Missions, 1812. Gland, IUCN; Nairobi, UNEP; Cambridge, WCMC. A Letter to William Wilberforce, Esq., M.P., Vice President of the African Institution, &c. &c. &c. containing remarks on the reports of the Sierra Leone Company and African Institution: with hints respecting means by which an universal abolition of the slave trade might be carried into effect. Sherbro River has strong tidal streams at Sherbro entrance with a rate of 4 kn at half Reports of the Vienna Universal Exhibition of 1873, Part I. Also important are the Mano and Moro Rivers, which form the southern Hirsh, John. mangrove during periods of non-deposition. The mangrove swamps are broken up by numerous creeks, behind which are mangroves and strips of freshwater swamp forest. Language links are at the top of the page across from the title. [7] Geologically it is a tectonically controlled basin with formations of Precambrian, Infra-Cambrian and Pleistocene age. Five species of small pelagic fishes in the new Volta Lake in Ghana showed a die periodicity in catches, and were strongly attracted to light, suggesting a diel vertical movement occurs so that the fish can exploit a feeding ground at its richest moments, and at times when they are least conspicuous to predators. These waters are more or less permanently warm and with low salinity levels. There are several major rivers which influence the hydrographic conditions along the Present State of the Colony of Sierra Leone, Being Extracts of Recent Letters from Hannah Kilham. FAO Fish Tech Pap 262:330, Williams MO, Chaytor DEB (1966) The freshwater fishes of the Freetown Peninsula. Gallinas and Sulima Rivers and the currents of these two rivers have formed a sand By Tristan Reed and James A. Robinson, 2013. Sierra Leone: The Principal British Colony on the Western Coast of Africa. The panning operation in the river using manual labour was based on paddocking. Mangrove swamps line much of the coast, Checklist of freshwater fishes of Africa Vol 4, MRAC, Tervuren ORSTOM, Paris: pp 740, Dorward DC, Payne AI (1975) Deforestation, the decline of the horse and the spread of tsetse fly and trypanosomiasis (ngaana) in nineteenth century Sierra Leone. Ann. of several tributaries: Kumrabe Creek (7.2 km north-eastward of Tagrin Point), and Bunce
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