الفهرس 
Traditional trickle irrigation systemOnly 14 pages are availabe for public view
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Abstract
The aim of this work is to design a trickle irrigation lateral with microtube
emitters. The items to achieve this aim are :-
1. Using different lengths and diameters for micro-tube emitter.
2. Emitters test in terms of manufacturing and hydraulic variations of
micro-tube emitter.
3. Finding the head loss due to the entrance of flow from the lateral to the
micro-tube emitter through a connection barb.
4. Evaluating a field installation of a micro-tube irrigation system.
A field experiment was conducted for 50 m of lateral length (13.6 and
18 mm inner diameter), and with 100 (spaghetti tube) micro-tube emitters
with lengths (0.5, 1.0 and 2.0 cm zigzag bar), and with 10 micro-tube
emitters with lengths (normal and adjusted) with zero slope level. In
addition, spacing was 0.5 m between 0.5, 1.0 and 2.0 cm zigzag bar but it
was 5 m between normal and adjusted lengths of emitters, while inlet
pressure head 100, 150, and 200 kPa were used. Several points were taken
into consideration,such as emitter characteristic friction loss, manufacturing
variation, flow rate and hydraulic variation. A compared study was carried
out between available theoretical and field parameters for lateral length. All
the last items were conducted to select the best emitter performance, the
best operation pressure, emitter discharge and spacing. The results showed
high correlation between field CV and calculated CV. It was noticed that
the average friction loss increased when pressure and emitter discharge
were increased.
Finally, The most suitable length of the irrigation lateral line in each of
the previous mentioned cases as well as the most suitable length of
submain and that in single and double lateral were determind.
Keywords: - Drip irrigation lateral – Micro tube emitter – Discharge –
Pressure – Uniformity coefficient – Emission uniformity – Friction loss.