A Hydraulic Study of Trickle Irrigation.

Document Type : Research Studies

Authors

1 Associate Professor., Irrigation and Hydraulic Engineering Department., Faculty of Engineering., El-Mansoura University., Mansoura., Egypt.

2 Research Assistant., Agricultural Engineering Department., College of Agriculture., Al-Qassim., King Saud University., Saudi Arabia.

Abstract

Polyethylene pipes are widely used in the trickle irrigation system. The main objective of this research work is to determine friction factors for this type of pipes. 
A field study was carried out on two trickle irrigation laterals each of which was about 240 m in length. One line had 18.5 mm inside diameter, the other consisted of two parts, the first was 21.5 mm inside diameter and the other was 17 mm inside diameter. 
The measured friction factor was compared by the corresponding friction factors given by conventional friction formulae. Blasius equation has to be modified to cope with the measured factors, and predicted equations are presented. 
The relationship between the discharge of the orifice type emitter and the pressure exerted on it, is given.

Main Subjects

MEJ- Mansoura Engineering Journal
Volume 18, Issue 3
September 1993
Pages 9-24

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