Soil water and salinity distribution under different treatments of drip irrigation.

Research output: Contribution to specialist publication or newspaperSpecialist publication article

Abstract

In this study, field experiments and numerical simulations for different drip irrigation treatments in a sandy loam soil were conducted to investigate soil water and salinity distribution as well as dye infiltration patterns. Three treatments, surface drip irrigation without and with plastic mulch (T1 and T2, respectively); and subsurface drip irrigation (T3), were used. In addition, daily and bi-weekly irrigation regimes were considered during performing each treatment. After ceasing the designed irrigation schedule of each treatment, horizontal soil sections were dug with 10 cm intervals. Then, dye patterns were captured using a digital camera and soil water and pore water electric conductivity were measured by a WET-sensor. Experiments results revealed that maximum dye infiltration depth and maximum dye coverage volume occurred during the bi-weekly irrigation regime and in T3. Daily irrigation regime kept the top soil layer moist with adequate amount of soil water as compared to bi-weekly regime. Moreover, T2 provided higher soil water content within the soil domain as compared to other treatments. The simulation results also demonstrated that model prediction for soil moisture distribution within the flow domain was excellent. Furthermore, T2 and daily irrigation showed lower salinity levels in the flow domain as compared to other irrigation treatments and regimes. In sum, mulching treatment with daily irrigation regime is recommended for arid areas over other drip irrigation treatments and regimes. In addition, HYDRUS-2D/3D can be used as a fast and cost effective assessment tool for water flow and salt movement for specific sites having similar soil conditions.

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Subject classification (UKÄ) – MANDATORY

  • Other Social Sciences
  • Water Engineering
Original languageEnglish
Pages1144-1156
Volume77
Issue number4
Specialist publication or newspaperSoil Science Society of America Journal
PublisherSOIL SCI SOC AMER
Publication statusPublished - 2013
Publication categoryPopular science

Related research output

Aboulila, T. S., 2012, Lund University. 63 p.

Research output: ThesisDoctoral Thesis (compilation)

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