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APJ ABDUL KALAM TECHNOLOGICAL UNIVERSITY
V SEMESTER B.TECH DEGREE EXAMINATION(R&S), DECEMBER 2019

Course Code: CE309
Course Name: WATER RESOURCES ENGINEERING

Graph sheets may be provided
PARTA
Answer any two full questions, each carries 15 marks.
A rain gauge recorded the following accumulated rainfall during a storm. Plot a

Hyetograph for the given data.

Time(am)

Accumulated
rainfall 0 2 3 7 12 19 20

(mm)

Describe how infiltration rate is measured using Double ring infiltrometer.
What is Recurrence interval? How is it determined?
The following are the ordinates of a 6 hour storm hydrograph of a catchment

area of 426 hectares.

3 8 0
Time 00.00 12noon 00.00 12noon 00.00
am pm pm
Ordinates
16 115 230 192 | 171 117 59 28 16
m/s

Construct a 6 hour unit hydrograph for the same basin , if constant base flow is

16 cumecs.

A station ‘A’ was inoperative while stations B, C, D and E registered 80 mm,
70mm, 83 mm and 79 mm of precipitation. Co-ordinates of B, C, D and E are
(7, 6), (10,-8), (-11,-5) and (-5, 5) respectively with coordinates of A as (0, 0).
Estimate storm precipitation by Inverse distance method.

A 12 hour storm rainfall with following depths in cm occurs over a basin.

3, 3.4, 8.6, 4.9, 11.5, 5, 3, 11, 5.4, 5.8, 1.6, 1.3. Surface runoff is 20.6 cm.

Determine the average infiltration index.

Duration: 3 Hours

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