In irrigation tubewell design, to minimize head loss, prevent screen corrosion and encrustation, and avoid sand-pumping, the maximum recommended entrance velocity of groundwater through the screen slot openings is:
Options:
(A) $0.03\text{ m/s}$ ($3\text{ cm/s}$)
(B) $0.25\text{ m/s}$ ($25\text{ cm/s}$)
(C) $1.0\text{ m/s}$
(D) $2.5\text{ m/s}$
Answer Key:
A
Step-by-Step Solution & Explanation
Standard well hydraulic design guidelines recommend that the entrance velocity of water through the well screen slot openings should not exceed $0.03\text{ m/s}$ ($3\text{ cm/s}$) to ensure laminar flow, minimize friction loss, and prevent sand entrainment.