(C) Depletion phase (from cutoff until water disappears from upstream end)
(D) Recession phase (drying front moves from upstream to downstream end)
Answer Key:
A, B, C, D
Step-by-Step Solution & Explanation
Surface irrigation hydraulics consists of exactly four chronological stages:
1. Advance phase
2. Storage/wetting phase
3. Depletion phase
4. Recession phase.
All four statements A, B, C, D are true.