Irrigation Water Conveyance and Application Methods
Subtopic: Surface, sprinkler and micro irrigation methods
Question Statement:
To prevent surface water ponding, soil crusting, and erosion-inducing runoff during sprinkler irrigation, the precipitation application rate of the sprinkler system must be:
Options:
(A) Less than the basic infiltration rate of the soil
(B) Greater than ten times the saturated hydraulic conductivity
(C) Equal to the critical velocity of open channel flow
(D) Independent of soil infiltration properties
Answer Key:
A
Step-by-Step Solution & Explanation
The fundamental agronomic requirement of sprinkler design is that the application rate ($I_{\text{app}}$ in $\text{mm/h}$) must never exceed the basic steady-state infiltration rate ($I_{\text{basic}}$ in $\text{mm/h}$) of the soil profile, ensuring immediate absorption without puddle formation or surface runoff. Option A is correct.