الفهرس 
Definitions of the trickle irrigationOnly 14 pages are availabe for public view
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Abstract
In this research, the main idea was to determine uniformity of flow
rate along drip lateral depending on the average of absolute deviation and
coefficient of variation (CV) of emitter flow rate. A field experiment was
conducted for 50 m of lateral length with outer diameter 16mm and
φ13.6mm inner and variation of emitter types, flow rates and spacing
between emitters. Several points were taken into consideration, such as
emitter characteristic friction loss, manufacturing variation, flow rate,
hydraulic variation. Study compared between available theoretical and
field parameters for friction losses, flow rates and lateral length. All the
last items were effected to select the best emitter performance, the best
operation pressure, emitter discharge and spacing. The results showed
high correlation between field CVf and determined CVt . It was noticed
that the average friction loss increased when pressure and emitter flow
rate were increased.
The various drip irrigation design parameters were studied and
their relationships verified through simulation.
The effect of emitter grouping was studied through simulation and
its relation to the situation when the emitters are ungrouped was found.
Finally, using three different design methods to access the optimal
design for trickle irrigation system under the same specification resulted
in the best system design and high water in distribution in comparison
with flow variation method for lateral line, in spite of the fact that the
price was the same and saving energy cost, by reducing friction losses.