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Spatio-temporal characterization of the water quality of the san pedro River (Cote D’ivoire, West Africa)

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Research Paper 15/07/2022
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Spatio-temporal characterization of the water quality of the san pedro River (Cote D’ivoire, West Africa)

TM. Kamelan, A. Diomandé, KA. Kouame, EP. Kouamelan
J. Bio. Env. Sci.21( 1), 134-145, July 2022.
Certificate: JBES 2022 [Generate Certificate]
Key: AnthropizationAssessmentPollutionUrbanizationWatercourses

Abstract

The San Pedro River is subject to the effect of land use change in its watershed. Originating in the primary forest of the PNT, it flows through a large agricultural area of agro-industrial hevea blocks, palm trees and village plantations, before emptying into the Atlantic Ocean in the urban area of San Pedro. In order to assess the impact of anthropization of its watershed, the San Pedro River was investigated from May 2016 to April 2017. The physico-chemical and ionic variables of the water were collected monthly in three study stations respectively through a multiparameter type Lovibond Senso Direct 150 and miniphotometers brand Hanna. Different statistical approaches (Kruskall-Wallis, Mann-Withney and Principal Component Analysis) were applied to a dataset of 1836 values in order to interpret the spatio-temporal variation of the water quality of this coastal river. Significant spatial variation (p<0.05) was observed between data from the forested area and the anthropized area. An increase in water temperature, pH, electrical conductivity, dissolved solids, phosphate and nitrogen compounds, as well as a decrease in dissolved oxygen and transparency were observed from the park to the urban area. This change in the aquatic environment highlighted the impact of the removal of forest cover in favor of agriculture and urbanization in the San Pedro River watershed. This could be an ecological stressor for aquatic species and limit the conservation of aquatic biodiversity. Water quality monitoring programs should be considered for the preservation of aquatic resources.

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