Abstract
This study aims to show the impact of successive floods on the spatial variation of the physico-chemical properties of sediments along the Bandama River in the localities of Sinématiali and Niakaramadougou because of their importance in the functioning of this ecosystem. Several samples were taken from both stations based on flood recurrence areas. The particle size analysis was done using the Robinson’s Pipette method. Traditional methods of sediment analysis have been used to measure organic carbon (O.C.), nitrogen (N), and other chemical properties including pH, organic matter (MO), and C/N ratio. Statistical analyzes were carried out to assess the differences between the physico-chemical parameters of the different sampling zones. In the area of niakamadougou, the lower values in MO were recorded in areas subject to more frequent flooding, thus close to the watercourse. In the Sinématiali area, lower M.O. values were recorded in sediments far from the stream. Total organic matter levels are higher in surface sediments with the lowest proportions of clay. The results show that the physico-chemical properties of the sediments vary at the level of the vertical distribution and according to their spatial distribution. Successive floods have a direct effect on the dynamics of the physico-chemical properties of sediments along the shore.
Highlights
The number of studies on the effects of climate change on the environment has increased steadily over the past decades, and these changes have a direct impact on river flow patterns and play a decisive role in stabilizing riparian ecosystems (Leroy Poff, 2002; Schipper et al, 2010)
This study aims to show the impact of successive floods on the spatial variation of the physico-chemical properties of sediments along the Bandama River in the localities of Sinématiali and Niakaramadougou because of their importance in the functioning of this ecosystem
The results show that the physico-chemical properties of the sediments vary at the level of the vertical distribution and according to their spatial distribution
Summary
The number of studies on the effects of climate change on the environment has increased steadily over the past decades, and these changes have a direct impact on river flow patterns and play a decisive role in stabilizing riparian ecosystems (Leroy Poff, 2002; Schipper et al, 2010). The constant input of sediment carried by successive floods has an impact on the physico-chemical properties of the sediment. The latter can vary enormously in vertical distribution and spatial distribution, which are influenced by various hydrological processes (Clinton et al, 2003; Watkins et al, 2010)
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