The rate of rainfall for the successive 30 min periods of a 3-hour storm are: 1.6, 3.6, 5.0, 2.8, 2.2 and 1.0 cm/hour. The corresponding surface runoff is estimated to be 3.2 cm. Then, the ∅ index is

The rate of rainfall for the successive 30 min periods of a 3-hour sto

1.	The rate of rainfall for the successive 30 min periods of a 3-hour storm are: 1.6, 3.6, 5.0, 2.8, 2.2 and 1.0 cm/hour. The corresponding surface runoff is estimated to be 3.2 cm. Then, the ∅ index is
A.	1.5 cm/h
B.	1.8 cm/h
C.	2.1 cm/h
D.	2.4 cm/h
Answer» C. 2.1 cm/h