Estimation of seasonal salt balance in soil water of Siwa Oasis closed basin, Western Desert, Egypt
Journal Title: International Journal of engineering Research and Applications - Year 2018, Vol 8, Issue 1
Abstract
Salinity of soil water problem in closed basins is so vital to water and soil. Siwa Oasis suffers from serious soil-water salinization and water logging problems. During the last four decades, more trials were carried out for improving soil water salinity via different authorities. Nowadays, some random reclamation projects are carried out in Siwa Oasis causing soil deterioration especially in the old cultivated land around Siwa lake (3000 Fed.). The present paper throws light on the changes in soil-water salinity as a result of the present agricultural activities. To achieve this goal, the salt balance of the soil-water of these cultivated lands is estimated. The estimation of the input and output components was carried out in the present work based on the field measurements during 1999.The estimated mean daily salt influx, input component to the soil water via 620 flowing wells and springs, reaches 215.4 ton and 465.1 ton during winter and summer season respectively. The high value of salt influx in summer season may attribute to the intensive irrigation activity in this season. The Output component includes the salt efflux through different drains from subsurface flow and the salinity losses due to plant uptake. The estimated daily mean value of salt efflux reaches 118.9 ton during winter season, while during summer season it reaches 378 ton. The average storage component, which equals to the difference between the salt influx and the salt efflux, is 7 ton /day and 88 ton /day during winter and summer season respectively. The estimation of salt balance shows that the soil water receives an excess of salt content ranges from 32 and 29 kg /day / Fed during winter and summer season respectively. While the salt load due to leaching of the root zone reaches more than 100 ton /day. Recommendations concerning salt reduction in the soil zone through improvement of irrigation and drainage techniques are focused in this paper.
Authors and Affiliations
Mohamed I. GAD, Hamoud N. Alalati, A. A. Abdel- Baki
Keywords
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- EP ID EP393456
- DOI 10.9790/9622-0801043744.
- Views 79
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