Multi-Indices Assessment of Origin and Controlling Factors of Trace Metals in River Sediments from a Semi-Arid Carbonated Basin (the Sebou Basin, Morocco)

Mrissani, Sara El; Haida, Souad; Probst, Jean‐Luc; Probst, Anne

doi:10.3390/w13223203

Cited by 9 publications

(2 citation statements)

References 63 publications

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“…The annual surface water inflow of the Sebou River 5600 Mm 3 .year -1 is very irregular in space and time with the effects of dams [8]. Liquid discharges from domestic wastewater and food processing industries (oil, sugar, dairy products, etc.)…”

Section: A Study Areamentioning

confidence: 99%

Modelling daily Dissolved Oxygen Dynamics in the Sebou River (Morocco): Data-Centric Approaches

Haida

Ablat

Sibari

et al. 2022

2022 2nd International Conference on Innovative Research in Applied Science, Engineering and Technology (IRASET)

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Dissolved oxygen is one of the parameters of river water quality for which the accurate estimation is critical and of significant importance for many environmental applications. The continuous monitoring at high frequency (1 hour) of the water quality of the Sebou at the Mechra Bel Ksiri gauging station began in June 2020 using a multiparameter probe YSI (EXO2) and sensors. Real-time water quality data were collected in the Sebou River for Dissolved Oxygen, pH, temperature, electrical conductivity, turbidity, chlorides, and nitrates. Water level measurements were recorded at the same frequency by the radar. In this study, the high-frequency measurement highlights nycthemeral cycles at the day scale. A sine function model and three machine learning techniques: XGB Regressor, Random Forest Regressor, and Linear Regression, were used to develop data-driven models using temperature, nitrate levels, pH, and electrical conductivity to reproduce the daily fluctuations of dissolved oxygen. Each machine learning model was calibrated for each input scenario using 80% of the data obtained between June and November 2020 and validated using the remaining 20%. The evaluation simulations quality included the calculation of the error indices between simulations and observations (MAE and RMSE) and coefficient of determination (R²). The prediction based on the three machine learning techniques gave good results for XGB Regressor, Linear Regression, and Random Forest Regressor with R 2 values of 0.93, 0.89, and 0.88, respectively, while the sine function was slightly over-predicting the daily cycle of dissolved oxygen (R² =0.80) and indicated a relatively high saturation rate. The error indices were very low, with MAE and RMSE ranging in 0.05-0.06 and 0.06-0.08 respectively, which suggests satisfactory models performance.

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Section: A Study Areamentioning

confidence: 99%

Modelling daily Dissolved Oxygen Dynamics in the Sebou River (Morocco): Data-Centric Approaches

Haida

Ablat

Sibari

et al. 2022

2022 2nd International Conference on Innovative Research in Applied Science, Engineering and Technology (IRASET)

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“…Since Raymo and Ruddiman proposed the role of tectonic uplift on silicate weathering and global climate cooling during the Cenozoic era [3], the Tibetan Plateau has received considerable attention [4][5][6][7][8][9]. Given that rivers integrate dissolved and solid weathering products, river geochemistry studies could shed light on weathering processes and fluxes at the basin/global scale [5,[10][11][12][13][14][15].…”

Section: Introductionmentioning

confidence: 99%

Ge/Si Ratio of River Water in the Yarlung Tsangpo: Implications for Hydrothermal Input and Chemical Weathering

Wang

Жао

et al. 2022

Water

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Germanium/Silicon (Ge/Si) ratio is a common proxy for primary mineral dissolution and secondary clay formation yet could be affected by hydrothermal and anthropogenic activities. To decipher the main controls of riverine Ge/Si ratios and evaluate the validity of the Ge/Si ratio as a weathering proxy in the Tibetan Plateau, a detailed study was presented on Ge/Si ratios in the Yarlung Tsangpo River, southern Tibetan Plateau. River water and hydrothermal water were collected across different climatic and tectonic zones, with altitudes ranging from 800 m to 5000 m. The correlations between TDS (total dissolved solids) and the Ge/Si ratio and Si and Ge concentrations of river water, combined with the spatial and temporal variations of the Ge/Si ratio, indicate that the contribution of hydrothermal water significantly affects the Ge/Si ratio of the Yarlung Tsangpo River water, especially in the upper and middle reaches. Based on the mass balance calculation, a significant amount of Ge (11–88%) has been lost during its transportation from hydrothermal water to the river system; these could result from the incorporation of Ge on/into clays, iron hydroxide, and sulfate mineral. In comparison, due to the hydrothermal input, the average Ge/Si ratio in the Yarlung Tsangpo River is a magnitude order higher than the majority of rivers over the world. Therefore, evaluation of the contribution of hydrothermal sources should be considered when using the Ge/Si ratio to trace silicate weathering in rivers around the Tibetan Plateau.

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Examining temporal trends in heavy metal levels to analyze sediment pollution dynamics in the Saida urban watershed (N‐W Algeria)

Fatmi,

Hazzab,

Rahmani

et al. 2024

Water Environment Research

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The study focuses on current pollution in the Saïda basin, a semi‐arid region in north‐western Algeria. By analyzing sediments, the study provides interesting results on urban pollution and its environmental impact. The research consists of two main phases, each addressing different aspects of pollution. In the first phase, different pollution indicators are used to analyze heavy metals and organic pollutants in urban drainage sediments. The results are compared with sediment quality guidelines, regulatory thresholds, and local and international references. Most of the metallic contaminants exceed the toxicity levels established by the continental crust and sediment quality guidelines, suggesting an anthropogenic origin. In addition, contamination indices show significant accumulation. In this context, the results highlight the importance of accumulation and transport processes in urban sediments. Hydrological parameters significantly influence heavy metal distribution mechanisms. Remarkable variations between copper (Cu) and lead (Pb) suggest a combined or singular source during transport. Conversely, chromium (Cr), nickel (Ni), and iron (Fe) are mainly derived from natural lithological sources. Cadmium (Cd) is associated with anthropogenic sources related to the agricultural use of phosphate fertilizers, whereas zinc (Zn) is mainly derived from physical corrosion processes. In the second phase, a combined descriptive and multivariate statistical analysis examines the mobility and distribution of heavy metals and their relationships with organic matter (OM) over time. Pronounced temporal variations in Cd, Zn, and Cu concentrations are attributed to human activities. Strong correlations exist between OM and cobalt (Co), Cu and Pb, confirming the ability of OM to adsorb these metals under specific geochemical conditions associated with waste disposal. Conversely, Zn, Cd, Cr, and Ni show weak or negative correlations with OM, suggesting diverse sources, including potential agricultural, industrial, and natural origins. The dendrogram confirms the existence of previously identified contaminant groups, suggesting common sources and potential co‐occurrence patterns. This analysis highlights the role of the drainage network as a physico‐chemical reactor in the mobilization of contaminants. It underlines the importance of sediment interactions in urban pollution processes. Finally, recommendations are proposed to ensure effective pollution control and remediation.Practitioner Points Useful information on pollution and its environmental impact is provided by the analysis of sediments in the urban basin of Saida (NW‐Algeria). The results of this study indicate high levels of heavy metals in the sediments, in excess of toxicity limits, and evidence of anthropogenic sources. Temporal variations in metal concentrations indicate the influence of human activities. The study has made it possible to identify the sources, to understand the mobility and distribution, and to control the contamination by heavy metals in the urban sediments. Drainage system serves as a pathway for dispersing contaminants.

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Multi-Indices Assessment of Origin and Controlling Factors of Trace Metals in River Sediments from a Semi-Arid Carbonated Basin (the Sebou Basin, Morocco)

Cited by 9 publications

References 63 publications

Modelling daily Dissolved Oxygen Dynamics in the Sebou River (Morocco): Data-Centric Approaches

Modelling daily Dissolved Oxygen Dynamics in the Sebou River (Morocco): Data-Centric Approaches

Ge/Si Ratio of River Water in the Yarlung Tsangpo: Implications for Hydrothermal Input and Chemical Weathering

Examining temporal trends in heavy metal levels to analyze sediment pollution dynamics in the Saida urban watershed (N‐W Algeria)

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