Irrigation Water Conveyance and Application Methods
Subtopic: Surface, sprinkler and micro irrigation methods
Question Statement:
From dripper performance evaluation, the discharge exponent = 0.5 and coefficient of variation = 0.04. The drippers are categorized as:
Options:
(A) Pressure compensating drippers of excellent quality
(B) Turbulent flow-tortuous path orifice type drippers of good quality
(C) Turbulent flow-tortuous path orifice type drippers of marginal quality
(D) Laminar flow drippers of excellent quality
Official Answer Key:
B
Step-by-Step Solution & Explanation
A discharge exponent x≈0.5 indicates fully turbulent, non-pressure-compensating flow (typical of tortuous-path orifice drippers) — a value near x=0 would indicate pressure-compensation, and x≈1 would indicate laminar flow. The measured manufacturing coefficient of variation places these emitters in the “good” quality category as per standard classification.
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