A Comparison Of Water Application Uniformity
For Drip Irrigation System Above And Below Soil
Surface At Various Soil Depths And Scheduling
Techniques In Arid Region
Author(s)
H. M. Al-Ghobari
Abstract
The uniformity of water application and its stability, however, are still a matter
of controversy and deserve more investigation. An experiment was conducted to
evaluate the surface and subsurface water application uniformity for drip
irrigation system using three irrigation scheduling techniques under field
conditions and to quantify uniformity of soil water content on the soil surface
and below soil surface. In this study an evaluation of uniformity of surface drip
irrigation system used to irrigate a tomato crop in Riyadh, Saudi Arabia. Three
irrigation scheduling techniques were used in the field to irrigate tomato crop.
The uniformity of water application from emitters and subsurface water contents
below the soil surface after 24 hours from irrigation was determined at different
distances and depths from the emitter in parallel and perpendicular directions to
the drip line.
Field results showed evidence the importance of redistribution of the applied
water. The values of surface water uniformity from emitters were higher by
approximately 13% than the subsurface uniformity below soil ground after
24 hours from irrigation. Also, the values of coefficients of subsurface
uniformity varied in the lower soil layers than in the upper layers for all
irrigation scheduling techniques. An experimental relationship between the
uniformity coefficients of surface and subsurface was derived under arid region
conditions.
Keywords: drip irrigation, water redistribution, uniformity, scheduling
techniques, below and above soil surface.
Keywords
drip irrigation, water redistribution, uniformity, scheduling
techniques, below and above soil surface.
Related Book
Other papers in this volume
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