Impact des activités humaines sur la dégradation de la qualité des sédiments de l’estuaire de Loukkos (Maroc)

Morhit, Mohammed El; Fekhaoui, Mohammed; Abidi, Abdellah El; Yahyaoui, Ahmed; Hamdani, Ahmed

doi:10.4267/dechets-sciences-techniques.2607

Cited by 10 publications

(13 citation statements)

References 11 publications

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“…In addition, there is a high concentration of TOC that reflects a state of pollution of the waters of the Grou River. This finding is consistent with [22]; which explained the high TOC load of the lower Loukkos estuary (8.33 and 19.96 mg/l), in the upstream-downstream direction through intense erosion of the watershed, following brutal storm rains and contributions of erosion and pollution.…”

Section: Total Organic Carbon (Toc)supporting

confidence: 80%

Impact of wastewater from the rural commune of Jmaa Moulblad on the physico-chemical quality of the waters of the Grou River (Rabat region, Morocco)

et al. 2018

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Abstract. The Grou River is one of the main rivers that feed the reservoir of the Sidi Mohammed Ben Abdellah (SMBA) dam in Morocco. However, this river is particularly threatened by the pollution problem. It is in this context that this study aims to study the effect of wastewater from the rural commune of Jmaa Moulblad on the physicochemical quality of the waters of this river. We analyzed 11 physicochemical parameters (T° of area, T° of water, pH, EC, mV, Sal, TDS, BOD, COD, SS and TOC), with a monthly frequency since the month of December 2014 until November 2015. The results obtained show a worrying situation of the state of this watercourse. To remedy this problem, we recommend pre-treatment of wastewater before discharge and the implementation of a management plan and sustainable management of the Grou River watershed.

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Section: Total Organic Carbon (Toc)supporting

confidence: 80%

Impact of wastewater from the rural commune of Jmaa Moulblad on the physico-chemical quality of the waters of the Grou River (Rabat region, Morocco)

et al. 2018

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“…To obtain the best conditions in an environmental study, it was necessary to compare the levels of metal clay sediments from different regions. 20–23 Table 4 summarizes some comparative data.…”

Section: Resultsmentioning

confidence: 99%

Determination of Some Heavy Metal Pollutants in Sediments of the Seybouse River in Annaba, Algeria

Louhi

Hammadi

Achouri

2012

Air, Soil and Water Research

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This study was conducted in order to fight against pollution of the environment. The study concerns river sediment of the Seybouse River in northeastern Algeria. Northeastern Algeria is known for its various industries (steel, fertilizer, metal processing, etc), and the sediment deposited by the Seybouse River, is probably polluted by heavy metals. For this study, we used two protocols of digestion of sediments, the first, using a mixture of hydrofluoric acid and perchloric acid, and the second, using aqua regia. The comparison of these two protocols will help us to find the best solubilization and thus facilitate the extraction and determination of heavy metals in sediment. Before determining the concentration of some heavy metals (Fe, Zn, Mn, Sn, Ni, Cr, Pb and Cu), we first analyzed parameters of sediments such as pH and organic matter. We used atomic absorption spectrometry (AAS) to measure these heavy metals. The functional groups characteristic of organic matter and particularly clays were identified by infrared spectroscopy. The average concentrations of metals exceeded acceptable standards for sediment pollution with heavy metals. Maximum concentrations in mg/kg respectively of the elements studied (

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“…The influence of the tide on the various physicochemical parameters studied was tested for each station using the t-Student statistical test. To test the effect of the space represented by the stations, the analysis of variance with a classification criterion (ANOVA 1) was used for each of the parameters and for each of the tides (Sokal & Rohlf 1995;El Morhit et al 2012).…”

Section: Discussionmentioning

confidence: 99%

Effects of the tide on the temporal and spatial physicochemical structure of the Kienké river estuary (South Atlantic Coast of Cameroon, Kribi) and its phytoplankton

Mama

Ghepdeu²,

Tankoua³

et al. 2023

OandHS

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The present work aimed to understand the physicochemical and phytoplanktonic structure of the Kienke estuary water in the urban area of Kribi town in relation to human activities and fluvial or oceanic influences. Field investigations and laboratory work were devoted to the sampling and measurement of some physicochemical and biological parameters, specific treatments and classical statistics (descriptive, multidimensional) of variables. Estuary water is characterised by an instability and spatiotemporal variations in its physicochemical parameters. The most sensitive parameters are as follows: a temperature ranging between 22.6°C and 31°C under the influence of atmospheric variations, electrical conductivity and salinity that are relatively high (0.22 < C. E < 49.70 mS cm-1; avg =16.56 mS cm-1; 0 < Sal < 29.32 PSU; avg = 11.51 PSU), and a pH that is overall acidic to basic (6 < pH < 8.86; avg = 7.75 ± 0.82). The nutrients variation (ammonium, nitrite, nitrate and orthophosphate) is very low in space and time, with a longitudinal distribution controlled by tidal flows, river flows and the biological pump. For the 64 samples collected, 167 phytoplankton taxa were identified. The most abundant (36.36%) were Chrysophyta Division, followed by Chlorophyta. Species richness is marked by brackish water taxa. According to this structure and the combination of both gradients, mineratilisation and organic matter enrichment is of a physicochemical typology, and the biotypology is hydrotypologically dependent.

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Impact des activités humaines sur la dégradation de la qualité des sédiments de l’estuaire de Loukkos (Maroc)

Cited by 10 publications

References 11 publications

Impact of wastewater from the rural commune of Jmaa Moulblad on the physico-chemical quality of the waters of the Grou River (Rabat region, Morocco)

Impact of wastewater from the rural commune of Jmaa Moulblad on the physico-chemical quality of the waters of the Grou River (Rabat region, Morocco)

Determination of Some Heavy Metal Pollutants in Sediments of the Seybouse River in Annaba, Algeria

Effects of the tide on the temporal and spatial physicochemical structure of the Kienké river estuary (South Atlantic Coast of Cameroon, Kribi) and its phytoplankton

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