Marine biology of the Sierra Leone River Estuary. 1. The physical environment

Findlay, I.W.O. (1978) Marine biology of the Sierra Leone River Estuary. 1. The physical environment. Bulletin of the Institute of Marine Biology & Oceanography, Fourah Bay College, University of Sierra Leone, 3(1), pp. 48-64.

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Abstract

The Sierra Leone River Estuary is a relatively young drowned river valley, it is shallow except for a deep channel which passes close to the Freetown shoreline. The upper reaches merge into a network of creeks and channels fringed by large areas of mangrove swamps. It is a tidal estuary of the semi-mixed type with the saline oceanic water entering it on a diurnal cycle. The climate of Sierra Leone is marked by a very distinct change between a very wet rainy season and a dry season. The tidal range of the Estuary (spring 3.03m; neap 2.28m) does not impede normal use of the harbour. The tidal variations can be felt as far as 42 miles inland along the water courses of the Sierra Leone River and its tributaries. The volume of fresh water entering the Estuary is large during the rainy season and greatly reduced during the dry season. Consequently there is a marked fall in salinity during the rainy season and higher salinities due to the marine influence prevailing during the dry season. The nature of the shores and bottom, the hydrography and chemistry of the estuarine system have been outlined in relation to the prevailing climatic conditions.

Item Type: Article
Title: Marine biology of the Sierra Leone River Estuary. 1. The physical environment
Personal Creator/Author:
CreatorsEmail
Findlay, I.W.O.
Corporate Creator/Author: Institute of Marine Biology & Oceanography, Fourah Bay College, University of Sierra Leone
Journal or Publication Title: Bulletin of the Institute of Marine Biology & Oceanography, Fourah Bay College, University of Sierra Leone
Volume: 3
Number: 1
Page Range: pp. 48-64
Date: 1978
Issuing Agency: University of Sierra Leone Fourah Bay College Institute of Marine Biology & Oceanography
Additional Information: Also available in "Bulletin of the Institute of Marine Biology and Oceanography", Special edition (1993) - ICLARM contribution no. 1002
Uncontrolled Keywords: Sierra Leone; hydrography; mangrove swamps; estuarine circulation
Subjects: Biology
Environment
Item ID: 6330
Depositing User: Ms Maria Kalentsits
Date Deposited: 22 Jul 2011 12:40
Last Modified: 22 Jul 2011 12:40
URI: http://aquaticcommons.org/id/eprint/6330

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