Mathematical model to predict the distribution of soil moisture in the root zone of turf landscape

الملخص EN

Field experiment was carried out on one of the turf (lawn), category (Passpalm 10) to study the effect of irrigation systems on soil moisture distribution in the root zone.

Experimental plot area was (4.5*4.5 ), soil media used was sandy soil and three treatments (spray, sub surface drib irrigation (SDI), hydrogel) irrigation and every treatment replicated three times.

Results of this research could be summarized as follows:  Annual water consumption was less by 77.3% , 71.3% when using hydrogel material, compared with other irrigation systems (spray, and SDI) resp.

, this is due to the quantity of loss water from evaporation in spray irrigation treatment, where evaporation parameters are more effective than the others (SDI, hydrogel) irrigation treatments.

 The hydrogel treatment has highest water saving by 170% , 300% compared with (SDI and spray) irrigation treatments, because the hydrogel's ability to hold water and has a large period between irrigation when using hydrogel in the soil.

 The SDI treatment has highest electrical saving by 520% , 55% compared with (spray and hydrogel ) irrigation treatments resp.

 The turf quality index (color, density, ground cover ) give high degree at hydrogel treatment compared with others, this is due to the hydrogel has many materials, both nat
urally occurring and synthetic and ability of water saving around root zone of turf.

 The average of soil moisture contents at (10cm and 15cm) depth of soil under hydrogel treatment was highest compared with (Spray and SDI) irrigation systems resp.