Section 4: Soil and Water Conservation Engineering
Hydrology and Runoff
Subtopic: Double Mass Curve
Question Statement:
The Double Mass Curve technique in rainfall data analysis is primarily employed to:
Options:
(A) Check and adjust the consistency and homogeneity of a precipitation record at a station against surrounding reference stations
(B) Estimate peak flood discharge
(C) Calculate evaporation from reservoir surfaces
(D) Determine optimum spacing of terracing
Answer Key:
A
Step-by-Step Solution & Explanation
A double mass curve plots cumulative rainfall of the test station against cumulative rainfall of a group of base stations; a change in slope reveals gauge relocation, exposure changes, or instrument drift.