Section 4: Soil and Water Conservation Engineering
Soil and Water Erosion
Subtopic: Soil loss estimation
Question Statement:
The approximate relationship between Sediment Delivery Ratio (SDR) and drainage area (A) shows that SDR varies
Options:
(A) directly with A^0.2
(B) inversely with A^0.2
(C) directly with A
(D) inversely with A
Official Answer Key:
A, B
Step-by-Step Solution & Explanation
Empirically, SDR decreases as drainage area increases (larger basins provide more opportunity for sediment deposition en route), following approximately SDR ∝ A^(−0.2), i.e., SDR varies inversely with A^0.2, matching (B).
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