Effects of soil texture and groundwater level on leaching of salt from saline fields in Kesem irrigation scheme, Ethiopia

https://doi.org/10.17221/137/2018-SWRCitation:Gelaye K.K., Zehetner F., Loiskandl W., Klik A. (2019): Effects of soil texture and groundwater level on leaching of salt from saline fields in Kesem irrigation scheme, Ethiopia. Soil & Water Res., 14: 221-228.
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In Ethiopia, soil salinity has become a challenge for agricultural production in irrigated arid and semi-arid areas. This research investigates the effectiveness of leaching salt remediation under different soil textures and groundwater tables. Leaching was conducted in the bare parts of three abandoned saline fields. Soil texture of Field 1 (F1) is sandy loam while Field 2 (F2) and Field 3 (F3) are clay loam. The F1, F2, and F3 groundwater was located at 1.8, 1.5 and > 3 m, respectively. The leaching requirement water levels were 15, 20, 25, and 30% higher than the evaporation of the bare field needed for four consecutive weeks, respectively. The results of this study show that, after four days of leaching, the salinity of F1 with sandy loam texture was significantly (P < 0.05) and more strongly reduced than for the other fields exhibiting clay loam texture. For F1, salinity was reduced from 16.3 to 6.2 dS/m and from 12.4 to 5.5 dS/m at depths of 0–30 and 30–60 cm, respectively. In head parts of F1 and F3, the salinity level was reduced to 2.0 dS/m. However, in F2 with shallow groundwater and clay loam texture, the salinity levels were slightly higher after leaching, i.e. from 11.2 to 12.0 dS/m and from 8.1 to 11.6 dS/m at 0–30 and 30–60 cm depths, respectively. In our experiment, effective leaching was achieved only in the field with sandy soil and deeper groundwater table. We saw that the application of leaching with surface drainage at shallow groundwater levels may further exacerbate salinity problems. For such situations, the use of subsurface drainage could sustain the groundwater depth and prevent additional salinization. On clay-textured fields with shallow groundwater table, a prolonged leaching application is necessary to reduce the salt contents.


Abrol I.P., Yadav J.S.P., Massoud F.I. (1988): Salt-Affected Soils and their Management. FAO Soils Bulletin No. 39, Rome, FAO.
Ali M.H. (2011): Practices of Irrigation and On-farm Water Management. Vol. 2, New York, Springer.
Awulachew S.B., Yilma A.D., Loulseged M., Loiskandl W., Ayana M., Alamire T. (2007): Water Resources and Irrigation Development in Ethiopia. Working Paper 123. Colombo, International Water Management Institute.
Ayars J.E., Hoffman G.J., Corwin D.L. (2011): Leaching and Rootzone Salinity Control. Chapter 12. In: Wallender W.W., Tanji K.K. (eds.): Agricultural Salinity Assessment and Management. 2nd Ed., Reston, ASCE: 371–403.
Ayenew T. (2007): Water management problems in the Ethiopian rift: Challenges for development. Journal of African Earth Sciences, 48: 222–236.  https://doi.org/10.1016/j.jafrearsci.2006.05.010
Ayers R.S., Westcot D.W. (1985): Water Quality for Agriculture. Irrigation and Drainage Paper No. 29. Rome, FAO.
Bernhardt C. (1994): Particle Size Analysis: Classification and Sedimentation Methods. London, Chapman and Hall.
Corwin D.L., Rhoades J.D., Simunek J. (2007): Leaching requirement for soil salinity control: Steady-state versus transient models. Journal of Agricultural Water Management, 90: 165–180.  https://doi.org/10.1016/j.agwat.2007.02.007
Devkota M., Gupta R.K., Martius C., Lamers J.P.A., Devkota K.P., Sayre K.D., Vlek P.L.G. (2015): Soil salinity management on raised beds with different furrow irrigation modes in salt-affected lands. Journal of Agricultural Water Management, 152: 243–250.  https://doi.org/10.1016/j.agwat.2015.01.013
Gelaye K.K., Zehetner F., Loiskandl W., Klik A. (2018): Effectiveness of a leaching mitigation for abandoned saline fields in Awash River Basin, Ethiopia. In: EGU General Assembly, Vienna, Apr 4–13, 2018: 15927.
Gelaye K.K., Zehetner F., Loiskandl W., Klik A. (2019): Comparison of growth of annual crops used for salinity bioremediation in the semi-arid irrigation area. Plant, Soil and Environment, 65: doi.org/10.17221/499/2018-PSE. https://doi.org/10.17221/499/2018-PSE
Heidarpour M., Mostafazadeh-Fard B., Arzani A., Aghakhani A., Feizi M. (2009): Effects of irrigation water salinity and leaching fraction on yield and evapotranspiration in spring wheat. Journal of Communications in Soil Science and Plant Analysis, 40: 2521–2535.  https://doi.org/10.1080/00103620903111384
Nabiollahi K., Taghizadeh-Mehrjardi R., Kerry R., Moradian S. (2017): Assessment of soil quality indices for salt-affected agricultural land in Kurdistan Province, Iran. Journal of Ecological Indicators, 83: 482–494.  https://doi.org/10.1016/j.ecolind.2017.08.001
Oster J.D. (1994): Irrigation with poor quality water. Journal of Agricultural Water Management, 25: 271–971. https://doi.org/10.1016/0378-3774(94)90064-7
Penman H.L. (1948): Natural evaporation from open water, bare soil, and grass. Proceedings of the Royal Society of London, 193: 120–145.  https://doi.org/10.1098/rspa.1948.0037
Rengasamy P. (2006): World salinization with emphasis on Australia. Journal of Experimental Botany, 57: 1017–1023.  https://doi.org/10.1093/jxb/erj108
Rhoades J.D. (1974): Drainage for salinity control. In: Ayers R.S., Westcot D.W. (1985): Water Quality for Agriculture. Irrigation and Drainage Paper No. 29, Rome, FAO.
Savva P.A., Frenken K. (2002): Surface Irrigation Systems Planning, Design, Operation, and Maintenance. Irrigation Manual, Vol. 2, Module 7. Harare, FAO/SAFR.
Taddese G. (2001): Land degradation: A challenge to Ethiopia. Journal of Environmental Management, 27: 815–824.
U.S. Salinity Laboratory Staff (1954): Diagnosis and Improvement of Saline and Alkali Soils. Handbook No. 60, Washington, D.C., USDA.
Van Hoorn J.W. (1981): Salt movement, leaching efficiency, and leaching requirement. Journal of Agricultural Water Management, 4: 409–428.  https://doi.org/10.1016/0378-3774(81)90030-5
Van Hoorn J.W., Combremont R., Ollat C., Said M. (1969): Leaching Efficiency. Tucson, Univeristy of Arizona Press.
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