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| Titel: |
Desalinization of Aggregated Saline Soil: Experiments on Columns of Spherical Aggregates |
| Auteur: |
A.A.Siyal A. G. Siyal Z. A. Abro A.W. Siyal R. Memon F.C. Oad |
| Verschenen in: |
Journal of applied sciences |
| Paginering: | Jaargang 2 (2002) nr. 4 pagina's 444-447 |
| Jaar: |
2002 |
| Inhoud: |
Salt affected soils may be reclaimed by leaching, but continuously pending the soil surface and allowing infiltration requires large quantities of water. During such leaching bypass flow occurs, consequently solute within the aggregates is transported much slower decreasing the overall leaching efficiency. The alternate is intermittent leaching which provides time for diffusion of solute from aggregates. Flux density and aggregate size have great effect on the leaching efficiency. Thus leaching of columns of spherical aggregates of three different sizes was carried out in the laboratory with continuous and intermittent leaching to explore the effect of aggregate size and the water flux density on the leaching efficiency. In continuous leaching the inflow of fresh water into column was set equal to outflow of leachate so that the aggregates were bathing in fresh water all the time. In case of intermittent leaching the inflow and out flow of water were regularly interrupted after certain time so as to provide time for salts in aggregates to diffuse out in the macro pores around the aggregates. Experimental results showed that leaching efficiency with intermittent leaching increased with increasing water flux density and aggregate diameter. Depending on the size of aggregate and water flux density water savings up to 65% were obtained under laboratory conditions by using intermittent leaching compared to that of continuous leaching. |
| Uitgever: |
Asian Network for Scientific Information, Pakistan (provided by DOAJ) |
| Bronbestand: |
Elektronische Wetenschappelijke Tijdschriften |
Details van artikel 10 van 42 gevonden artikelen
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