Question Bank • QB_EXP_IDE_DRP_010 NAT • 1 Mark

Section 5: Irrigation and Drainage Engineering

Drip / Micro-Irrigation Design & Emitters

Subtopic: Drip emitter flow rate from pressure head

Question Statement:

A standard orifice-type drip emitter has an emitter discharge equation $q = 1.2 H^{0.5}$, where $q$ is in $\text{L/h}$ and $H$ is pressure head in $\text{m of water}$. At an operating pressure head of $H = 10\text{ m}$, the emitter discharge rate is ________ $\text{L/h}$ (round off to two decimal places).

Answer Key:

3.79

Step-by-Step Solution & Explanation

Applying the emitter discharge equation: $q = k H^x = 1.2 \times (10)^{0.5} = 1.2 \times 3.1623 = 3.79\text{ L/h}$
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