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Evolution géochimique de la solution des sols irrigués par les eaux à alcalinité résiduelle positive en conditions contrôlées. Application au Bas-Chéliff
| Content Provider | Semantic Scholar |
|---|---|
| Author | Abdelhamid, Bradaï Abdelhamid Bradaï Abdelkader, Douaoui Abdelkader Douaoui |
| Copyright Year | 2013 |
| Abstract | This paper studies the geochemical evolution of the soil solution in contact with water irrigation of a positive residual Alkalinity, in order to predict their salinization path and structural d egradation under the effect of water concentration by evaporation. Two soil textures, one equilibrated (S1) and the other is clay (S2), are d istributed in pots made by PVC tubes of 5 cm diamete r and 12 cm high in the laboratory. The water with a positive residual alkalinity (E: RS C> 0) is brought up to pots till soil is oversatura ed then, after 24 hours, the water excess is shipping dry naturally and the soil reach s his retention capacity. The weight difference be twe n the wet pot and the dry one gives the necessary water volume to push the soil into hi s field capacity. The total evaporation of the brou ght volume water is the concentration factor (CF). Soil solution contained in the pots is extracted for chemical analysis. Fifteen concentrat ion factors were performed. As far as the waters are concentrated, the calcium and magnes ium ions were precipitates and an increase in the s odium molality in the soil solution. The increase of the concentrations factors leads to the desorption of sodium ion to the exchange compl ex under the effect of depletion of elements with big solubility’s (Ca and Mg). It was thus observed an increase in the SAR, especially for clayey soils, which led to the destruction of the structure. |
| Starting Page | 27 |
| Ending Page | 32 |
| Page Count | 6 |
| File Format | PDF HTM / HTML |
| Volume Number | 5 |
| Alternate Webpage(s) | https://www.univ-chlef.dz/revuenatec/Art_08_C_04.pdf |
| Language | English |
| Access Restriction | Open |
| Content Type | Text |
| Resource Type | Article |
