Geochemistry of saline minerals separated from Lake Qarun brine

Rasmy, Mokhtar; Estefan, Selim F.

doi:10.1016/0009-2541(83)90033-5

Cited by 12 publications

(4 citation statements)

References 4 publications

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“…Therefore, during the movement of groundwater towards Lake Qarun, the dominant anion changes from HCO 3 -to SO 4 2-. Since gypsum is abundant in the Faiyum (Rasmy & Estefan, 1983;Aref, 2003), this increase in sulphate concentration, and the transformation from HCO 3 --Na ? brine to SO 4 2--Na ?…”

Section: Discussionmentioning

confidence: 98%

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Ostracods and the Holocene palaeolimnology of Lake Qarun, with special reference to past human–environment interactions in the Faiyum (Egypt)

et al. 2010

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We present an ostracod record covering the past two millennia from an 8.25-m core taken from Lake Qarun, in the Faiyum Depression of Egypt. The occurrence of ostracod species in the lake is controlled primarily by variations in solute composition, which are in turn related to shifts in catchment land use. At times when the Faiyum Depression supported thriving agriculture, lake water contained Na ? -Cl -brine, and Cyprideis torosa dominated the ostracod assemblage. When the Faiyum Depression experienced periods of environmental and economic decline, lake water contained Na ? -HCO 3 -brine, and Limnocythere inopinata dominated. The relative abundance of other ostracod species provides additional information about past conditions in Lake Qarun including salinity and lake level changes. Overall, the ostracod assemblages provide evidence for human influences in the Faiyum, which extend back before instrumental or detailed observational records began.

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Section: Discussionmentioning

confidence: 98%

“…brine, may have been brought about by the action of the HCO 3 --Na ? solution on gypsum deposits in the following way (Rasmy & Estefan, 1983).…”

Section: Discussionmentioning

confidence: 99%

Ostracods and the Holocene palaeolimnology of Lake Qarun, with special reference to past human–environment interactions in the Faiyum (Egypt)

et al. 2010

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“…The agricultural activities in the Fayoum Depression depend mainly on Nile water. The agriculture drainage water annually carries 470 × 10 6 kg of dissolved salts to Lake Qarun [16]. Since the lake has no outlet and the climatic conditions are warm and dry almost all the year, the lake brine gradually evaporates and its salinity increases.…”

Section: Introductionmentioning

confidence: 99%

Crystallization sequence during evaporation of a high concentrated brine involving the system Na–K–Mg–Cl–SO4-H2O

et al. 2015

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“…Nowadays, 3,822,836 people inhabit the Fayum depression (CAMPAS 2020b). Owing to the steep downward slope of Fayum land towards Lake Qaroun (Donia 2013), the lake annually receives 470*10 6 kg dissolved salts from the agricultural drainage (Rasmy and Estefan 1983). Since the lake is regarded as an endorheic lake without outlets (Williams and Mann 2014), the continuous increase of agricultural discharge and evaporation rate had raised the lake's salinity.…”

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confidence: 99%

Can statistical remote sensing aid in predicting the potential productivity of inland lakes? Case study: Lake Qaroun, Egypt

Mohamed

Khalil

El‐Kafrawy

et al. 2022

Stoch Environ Res Risk Assess

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This study aimed at creating a sustainable and inexpensive Landsat-based electrical conductivity model that can easily notify fisheries managers of changes in electrical conductivity and hence the potential fish yield of Lake Qaroun in Egypt. The study integrated geospatial technology, field measurements, mathematical computations, and fish yield empirical model into the adopted methodology. Seventeen sampling sites covering the entire study area were selected to measure the electrical conductivity (EC; mS/cm) and water depths (D; m) of Lake Qaroun, Egypt, during November 2018. Spatial analysis tools within ArcGIS were used to extract EC data from non-surveyed sites. A high-resolution Sentinel-2B MSI and a cloud-free medium-resolution Landsat-8 OLI scenes for Lake Qaroun were used for morphometric and regression analyses, respectively. For regression, 75% of the dataset was used to build up the regression model, while the remaining 25% was used for validation. The study selected Landsat band ratios that correlated with the highest certainty (R > 0.80) with the examined EC. Stepwise regression model was then developed to predict EC from Landsat-8 data. In choosing the best regression model, the study selected the significant model (P < 0.05) with the highest coefficient of determination (R2) and the least error metrics. Finally, the developed model was applied in calculating the potential yield of Lake Qaroun. The innovative EC model derived in the current study using Landsat-8 OLI for Lake Qaroun showed a very good performance in estimating 95% of EC values significantly with high acceptable accuracy. In closure, the model can be used very efficiently as a decision support tool in assisting managers not only in monitoring the lake’s electrical conductivity regularly, during the month of November, but also in making preliminary estimates of the lake’s potential yield.

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Geochemistry of saline minerals separated from Lake Qarun brine

Cited by 12 publications

References 4 publications

Ostracods and the Holocene palaeolimnology of Lake Qarun, with special reference to past human–environment interactions in the Faiyum (Egypt)

Ostracods and the Holocene palaeolimnology of Lake Qarun, with special reference to past human–environment interactions in the Faiyum (Egypt)

Crystallization sequence during evaporation of a high concentrated brine involving the system Na–K–Mg–Cl–SO4-H2O

Can statistical remote sensing aid in predicting the potential productivity of inland lakes? Case study: Lake Qaroun, Egypt

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