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Reg No.: Name:
APJ ABDUL KALAM TECHNOLOGICAL UNIVERSITY
Fifth Semester B.Tech Degree Regular and Supplementary Examination December 2020

Course Code: CE309
Course Name: WATER RESOURCES ENGINEERING

Max. Marks: 100 Duration: 3 Hours
Instructions: Graph sheet will be supplied on request
PARTA
Answer any two full questions, each carries 15 marks. Marks
1 a) Explain the different forms of precipitation. (5)
b) Explain the working of a Siphon type raingauge with a neat sketch. (5)

c) The normal annual rainfall at stations A, B, C and D in a basin are 809.7, 675.9, (5)
762.8 and 920.1 mm respectively. In the year 2000, the station D was inoperative and
the stations A, 8 and C recorded annual precipitations of 911.1, 723.3 and 798.9 mm
respectively. Estimate the rainfall of station D in the year 2000 by normal ratio
method.
2 a) A six hour storm produced rainfall intensities 7, 18, 25, 12, 10 and 3 mm/hr in (8)
successive one hour intervals over ೩ basin of 800 km’. The resulting runoff observed
to be 2640 ha.m. Determine the -index of the storm.
b) Explain the use of double ring infiltrometer for measurement of infiltration. How will (7)
you fit Horton’s model.
3 ച Define Unit hydrograph. Enlist the assumptions of Unit hydrograph theory. (5)
b) The peak flood hydrograph due to a 3-hr duration isolated storm in a catchment is (10)
270 m*/sec. Total depth of rainfall is 5.9 cm. Assuming an average infiltration loss of
0.3 cm/hour and a constant baseflow of 20 m*/sec estimate the peak of 3-hr unit
hydrograph of this catchment. If the area of the catchment is 567 ന, determine the
base width of 3-hr unit hydrograph assuming it to be triangular in shape.
PART 0
Answer any two full questions, each carries 15 marks.
4 a) Differentiate (i) lift irrigation and flow irrigation (ii) perennial irrigation and (6)
inundation irrigation

b) The following data pertains to the healthy growth of a crop (i) Field capacity of (9)

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