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Lawal, A.
Department of Agricultural and Bioenvironmental Engineering, Waziri Umaru Federal polytechnic, Birnin-Kebbi
Muhammad, K. D.
Department of Agricultural and Bioenvironmental Engineering, Ahmadu Bello University, Zaria
Adigun, H. A.
Department of Agricultural and Bioenvironmental Engineering, Waziri Umaru Federal polytechnic, Birnin-Kebbi
ABSTRACT
The Research was carried
out to evaluate the performance of a gravity drip irrigation kit in a
greenhouse. The system consists of a 2m3 tank mounted 2m above
ground, connected to a mainline which is also connected to two sub-mainlines.
Each sub-main has six junctions and each junction has two laterals connected to
it giving a total of 24 laterals in the system. Measurement of emitters
discharges was carried out from six (6) laterals selected one from each of the
six junctions. The pressure heads at the designated laterals were measured
using a pitot tube from which the operating pressure was calculated. The result
of the Research shows an average discharge of the emitter for the system of
857mLh-1. The uniformity coefficient and emitter coefficient of
variation for the whole system were found to be 94.87% and 0.07 respectively.
The uniformity of the system is classified as Excellent while the emitter
coefficient of variation CV, obtained from the study (0.07) for this type of
emitter is classified as average. The value of the emitter coefficient (k) and
emitter exponent(x) were found to be k=2.54 and x=0.5. The value of the emitter
exponent (x=0.5) shows that the flow regime of the emitter is fully turbulent
flow. The results of tests show that the emitter discharges were uniformly
distributed over all operating pressures. The discharge also increases with
operating pressure for all tested emitters.
Keywords: Drip irrigation, emitter, discharge, and operating pressure
https://doi.org/10.33922/j.ujet_v8i2_2
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Published
Thursday, December 22, 2022
Issue
Vol. 8 No. 2, December 2022
Article Section
GENERAL
The contents of the articles are the sole opinion of the author(s) and not of UJET.
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