Distribution, Speciation and Bioavailability of Nutrients in M’Badon Bay of Ebrie Lagoon, West Africa (Côte d’Ivoire)

N’Goran, Koffi Martin; Soro, Monique; Kouassi, N’guessan Louis Bérenger; Trokourey, Albert; Yao, Koffi Marcellin

doi:10.1007/s42250-023-00590-x

Cited by 6 publications

(3 citation statements)

References 63 publications

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“…To determine the net rain associated with each elementary shower, it is sufficient to successively subtract the cumulative values obtained for each time interval [33]. R = P -Ia -F (10) Ia = P, if P < Ia (11) Calculation of incoming sediment load The quantity of sediment entering the strip was calculated from the MUSLE model [35]; it is the modified version of the USLE model (universal soil loss equation) which evaluates water erosion during flooding based on five erosion factors. The equation is given by Equation ( 12):…”

Section: Stepsmentioning

confidence: 99%

“…The Lobo reservoir is used by the Cote d'Ivoire Water Distribution Company (SODECI) to supply drinking water to the Daloa town populations and its surrounding areas as well as to meet the water needs of agropastoral activities. The work carried out by Koua et al [8], Soro et al [9], N'goran et al [10] showed a spatial distribution of nutrients from mineral fertilizers applied to plants. This distribution predisposes ivorian reservoirs, particularly the Lobo reservoir to an enrichment of nutrient elements responsible for the observed eutrophication phenomenon in that reservoir.…”

Section: Introductionmentioning

confidence: 99%

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Fight against Eutrophication of the Lobo River in Daloa (Central‐West Ivory Coast): Methodology for Applying a Pollutant Transfer Model through a Vegetative Filter Strip

Koua,

Kouassi,

Kouassi

et al. 2024

Preprint

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The Lobo reservoir designed to supply water to the Daloa city populations (Central west of Côte d'Ivoire) is facing the phenomenon of eutrophication due to the agricultural plots located upstream the reservoir inputs. Studies have highlighted the reservoir pollution and sedimentation problem. This study was initiated to provide a simple and effective solution to the eutrophication problem. The main objective is to determine the potential optimal dimensions of a grassed strip in order to limit the eutrophication phenomenon of the Lobo reservoir. The sizing of this grassed strip was done using the VFSMOD model. The flow from the pollution source plots was simulated and integrated into the model. The different scenarios tested from the band width variation have concerned the return periods of 1 and 2 years. The results obtained revealed that for the one-year return period, the grassed strip to be installed should have a width of 12.70 m in order to reduce by 70% the flow entering the strip considering the diffuse runoff over a length of 300 m. For the two-year return period, a width of 22.95 m should be required with the same length. The scenarios showed that a grassy strip width equal to 3 m should allow a reduction of 75% of upstream sediments.

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Section: Stepsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Fight against Eutrophication of the Lobo River in Daloa (Central‐West Ivory Coast): Methodology for Applying a Pollutant Transfer Model through a Vegetative Filter Strip

Koua,

Kouassi,

Kouassi

et al. 2024

Preprint

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show abstract

“…Several studies published previously [14][15][16][17][18][19] have highlighted the Lobo water body's advanced eutrophication state. These studies were based on the analysis of biological and physicochemical parameters from point samples taken from the water body and did not allow an in-depth understanding of the eutrophication phenomenon, in particular, the nutrient transfer in the basin.…”

Section: Introductionmentioning

confidence: 99%

Spatial Distribution of Nutrient Loads Based on Mineral Fertilizers Applied to Crops: Case Study of the Lobo Basin in Côte d’Ivoire (West Africa)

Koua,

Jeong,

Alemayehu

et al. 2023

Applied Sciences

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Eutrophication in the Lobo watershed remains a major problem. The work carried out has focused on chemical and biological analyses in the lake or in its immediate environment: they did not sufficiently take into account the diffuse transfer of nutrients over the entire watershed. This study aims to assess the nutrient (N and P) loads in the Lobo watershed, an agricultural area, to understand the spatio-temporal impacts of land management practices on eutrophication. The methodology uses two steps: streamflow calibration and nutrient (N and P) estimation using the Soil and Water Assessment Tool (SWAT) watershed model. Thus, the nutrient inputs were estimated based on the levels of N and P in every kilogram of Nitrogen-phosphorus-Potassium (NPK) type fertilizers applied by farmers. The average quantities of N and P applied to the crops were 47.24 kg ha−1 and 21.25 kg ha−1. Results show a good performance on flow calibration as evidenced using evaluation criteria R2, Nash–Sutcliffe Efficiency (NSE), and Percent Bias (PBIAS) of 0.63, 0.62, and −8.1, respectively. The yields of inorganic N and soluble P varied from 0 to 0.049 kg ha−1 and from 0 to 0.31 kg ha−1. These results show that the crops’ inorganic nitrogen requirements were higher than the demands for soluble phosphorus. Simulations relating to the organic N transfer revealed values ranging from 0.2 to 5 kg ha−1, while the transport of organic phosphorus was estimated to vary from 0.3 to 1.3 kg ha−1.

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Dynamics of sediment phosphorus in the middle and lower stretch of River Ganga, India: insight into concentration, fractionation, and environmental risk assessment of phosphorus

Saha,

Das,

Tiwari

et al. 2024

Environ Geochem Health

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Distribution, Speciation and Bioavailability of Nutrients in M’Badon Bay of Ebrie Lagoon, West Africa (Côte d’Ivoire)

Cited by 6 publications

References 63 publications

Fight against Eutrophication of the Lobo River in Daloa (Central‐West Ivory Coast): Methodology for Applying a Pollutant Transfer Model through a Vegetative Filter Strip

Fight against Eutrophication of the Lobo River in Daloa (Central‐West Ivory Coast): Methodology for Applying a Pollutant Transfer Model through a Vegetative Filter Strip

Spatial Distribution of Nutrient Loads Based on Mineral Fertilizers Applied to Crops: Case Study of the Lobo Basin in Côte d’Ivoire (West Africa)

Dynamics of sediment phosphorus in the middle and lower stretch of River Ganga, India: insight into concentration, fractionation, and environmental risk assessment of phosphorus

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