Effect Of Soil Surface Slope On The Performance Of Trickle Line Source:(B)Surface Runoff
AL-Rafdain Engineering Journal (AREJ),
Volume 22, Issue 5, Pages 14-23
AbstractThe present study aims to find out the einterferences effects of the soil surface slope, the water application rate, soil type, and the initial soil moisture on the local surface runoff, which is resulting from the application of certain water volume by trickle line source. In addition to determining the maximum applicable value for each of the above mentioned factors, which can be used without the surface runoff occurs which may be lead the water out of the area that is supposed to be secure the moisture from concerned trickler. The study included 16 test to monitor the advance of the wetting front and the local surface runoff with time in the soil profile under trickle line source. This was done by using sandy loam soil and clay loam soil, several soil surface slopes (0%, 3.75%,7.5%, 15%), two water application rates(3.03,5.06) ml/min/cm and two levels of the volumetric initial moisture for each soil. The study results showed that the surface runoff downstream trickler increases with the increase of the soil surface slope or the increase the water application rate or the increase of the initial soil moisture and the surface runoff effects are greater in the clay loam soil than the sandy loam soil. And study proposed the maximum value for each of the soil surface slope, the water application rate, and the volumetric initial soil moisture for study's soils when using trickle line source, so that the surface runoff does not happen outside the area that is supposed to be secure moisture from the concerned trickler.
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