International Journal of Science and Technology

International Journal of Science and Technology>> Volume 7, Number 9, September 2017

International Journal of Science and Technology


Effects of Irrigation with Treated Wastewater on the Physical and Chemical Properties of Soil in Kuwait

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Author M. Al-Senafy, A. Akber
On Pages 139-150
Volume No. 2
Issue No. 3
Issue Date April, 2012
Publishing Date April, 2012
Keywords Farm, infiltration, return water, chemical, parameters, agriculture


Abstract

With the passage of time, reclamation and reuse of wastewater gain global importance as the demand for water increases and usable sources of water dwindle due to high consumption rates and quality degradation resulting from anthropogenic pollution. The problem is even further manifested in arid and semiarid regions such as Kuwait where desalination plants provide most of the freshwater supplies. The main objective of this study was to determine the effects of the infiltrating return water as it passes through the soil and the corresponding changes on chemistry, mineralogy, and hydraulic parameters of the soil. The study was conducted in the United Agricultural Production Company (UAPCO) Farm which is located in Sulaibiya area at the west of Kuwait City. The UAPCO Farm has been irrigated with tertiary treated wastewater since 1976. For the purpose of this study, data were collected through drilling of boreholes, establishment of ceramic cups and lysimeters, collection of soil samples from different depths, field penetration and infiltration tests as well as laboratory infiltration tests through sand columns. Soil samples were collected from irrigated and non-irrigated areas down to a depth of 1 m below the ground surface at 10-cm intervals to investigate the soilís characteristics. The chemical constituents of the leachate that was prepared from extracts of the soil samples were analyzed for nitrate, ammonia, phosphate, sulphate, chemical oxygen demand (COD) and biological oxygen demand (BOD). The collected soil samples were also analyzed using x-ray diffraction (XRD) to identify their mineralogical composition, with special emphasis on the clay content. Physical and chemical analyses of the soils revealed that there has been no negative impact of the wastewater used for irrigation on the upper 50-cm layer of the soil. Therefore, treated wastewater (with an EC of 1.47 dS/m) was considered appropriate for irrigation of forage crops.

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