Question

Match List-I (Hydrological terms) with List-II (Relationship/Nature of curve) and select the correct answer using the codes given below the lists:

List-I
A. Thiessen Polygon
B. Mass Curve
C. Hyetograph
D. DAD curve
List-II
1. Average depth of rainfall over an area
2. Relationship of rainfall intensity and time
3. Relationship of accumulated rainfall and time
4. Relationship of river run-off and time
5. Always a falling curve
Codes:
A B C D

• A. 1 3 2 5
• B. 1 5 3 2
• C. 4 3 2 5
• D. 4 5 3 2

Answer 1

The correct option is A 1 3 2 5

Method used to convert point rainfall values at different rainguage stations into an average value over a catchment include

• Arithmetical Mean Method
• Thiessen Polygon Method
• Isohyetal Method

A Mass curve is the graph of the cumulative values of a hydrologic quantity (such as precipitation or runoff), generally as the Ordinate, plotted against time or date as the Abscissa.