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العنوان
MAXIMIZING OF DISTRIBUTION UNIFORMITY
FOR DRIP IRRIGATION SYSTEM USING
CLOSED-CIRCUITS /
المؤلف
ABOKORA,AYA MOHAMED ALI.
هيئة الاعداد
باحث / AYA MOHAMED ALI ABOKORA
مشرف / Khaled Faran Taher El- Bagoury
مشرف / Osama Mohamed Ahmed Bedair
مشرف / Wael Mahmoud Mokhtar Sultan
مناقش / Gomaa Abd-Rabou Abdel-Rahman Bakeer
تاريخ النشر
2018
عدد الصفحات
88p.:
اللغة
الإنجليزية
الدرجة
ماجستير
التخصص
الهندسة الزراعية وعلوم المحاصيل
تاريخ الإجازة
1/1/2018
مكان الإجازة
جامعة عين شمس - كلية الزراعة - الهندسة زراعية
الفهرس
Only 14 pages are availabe for public view

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Abstract

The required hydraulic tests and measurements were conducted at
National Irrigation Lab of Agricultural Engineering Research Institute
(AEnRI), Dokki, Giza. The aim of this investigation was to enhance
distribution uniformity of traditional drip irrigation system that use one
single inlet of water, operation of maximization based on the technique of
closed circuits with two manifolds.
The distribution uniformity is affected by both pressure
distribution along pipes and hydraulic characteristics of the drippers. The
selected drippers were tested under operating pressures of (50, 75, 100,
125 and 150 kPa), and the dripper irrigation lateral lengths were (35, 50,
75 and 100m). Two designs of drip irrigation were applied; first was
closed circuits with two manifolds as a modification of traditional design,
and the other design was the traditional with one manifold as a control.
Three types of built in drip lines of vortex drippers with flow rate
of (4l/h) and two types of on line vortex dripper with flow rate of (2 and 4
l/h) were calibrated. The results indicated that the closed circuits was the
best specially when using lateral lengths (75 and 100m), but the values
were nearly close in case of using lateral lengths of (35 and 50m).
Maximizing distribution uniformity is possible for traditional design when
using self-compensating flow rate where it can reach value of 88.2% with
100m lateral length, the accepted lateral length in case of using built in
drip line with 30cm spacing was 75m for closed circuits design where the
DU% was 94% comparing with 79.2% for traditional design. The closed
circuits had a significant positive effect in reducing friction head losses of
non-pressure compensating built in drip line ranged from 20 to 41.7 % ,
where the percentage ranged from 10% to 50% for built in drip line with
50cm spacing – pressure compensating.
Key words: Drip irrigation, Dripper calibration, Distribution uniformity,
Closed circuits, Friction head losses, Lateral lengths.