USN 10cv55

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Fifth Semester B.E. Degree Examination, Dec.2013 / Jan.2Ol4Hydrology and lrrigation Engineering

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Max. Markq,ll00

Note: l. Answer any FIVEfull questions, selectingatleast TI,I/O question from each port.

2. Assume any missing data suitably. ,i,

" ""'::' PART - ADefine Rain gauge. Describe with a neat sketch the principle of ,w6r[ing of Symon's non -recording gaqge and its demerits. (08 Marks)Define Precipitdlion. Explain the different forms of precipitation. (06 Marks)

Define evaporalion. With a neat sketch. explain the measurement of evaporation using ISclass A p&n. ,,,,, (07 Marks)Explain factorS affecting infiltration capacity. (07 Marks)A 6h st.o, qry producing rain fall intensities of 7 , 18, 25 , 12, 1 0 and 3mrr/h in successive oneh6uf.ffierval over a basin of 800sq.km. The resulting runoff is obseived to be 2640 ha.m.Deleimine the $ - index for the basin.

Define unit hydrograph. Derive the unit hydrograph from an isolated storm. (06 Marks)Explain in detail the various methods of base flow separation. (08 Marks)In a typical 4 hr storm producing 5im of run off from a basin. The flow in the stream area isas follows. (06 Marks)

Time in hr 0 2 4 6 8 12 t6 20Flow in cumec 0.0 t.25 4.25 6.75 5.60 3.50 1.3s 1.0

Define flood. Explain factors affecting flood. (04 Marks)Give three empirical formula that are commonly used to estimate the design flood? Alsospecify the regions in India, where they are applied and range of coefficient values in theequation. (10 Marks)Differentiate between : i) Channel routing and Reservoir routing ii) Droson storage

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and Wedge storage. (06 Marks)

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10cv55

PART - B

a. Define the term irrigation. Briefly describe the factors which necessitate the irrigation.

b. Explain any three of the following : i) Well irrigationgalleries ir) Sewage irrigation v) Lift irrigation.

',c. Write a note on Environmental impacts of irrigation.

a Wrth a neat sketch, describe soil profile and add a note on physical propertits of soils.,:,,,,,,, (08 Marks)

Discuss various methods of assessment of irrigation water. (06 Marks)Explain in detail irrlgaiion efficiency and add a note"ohcrop seasons of India. (08 Marks)A channel is to be designe'd fur irrigating 5000 hectafes in Kharif crop and 4000 hectares inRabi crop. The water requirement for Kharif and Rabi are 60cm and 25cm respectively. TheKor period for Kharif is 3 weeks and for Rabi is 4 weeks. Determine the discharge of the

(06 Marks)

(08 Marks)(06 Marks)

What is meant by Design of canals and write a note on comparison between Kenned's and

channel for which is to be designed.

Define canal. Discuss the various types of canals.

Write a note on alignments of canals.

Lacey's theory.:

(08 Marks)ii) Tube irrigation iii) Infiltration

(06 Marks)

f06 Marks)

b. pisCubs briefly the classification of Indian soils. (06 Marks)c. Determirto the fiequency of irrigation from the following data : i) Field capacity of

soil : 35;% ii) Permanent writing point : 18% iii) Density of soil : 1.5glcm3iv) Depth of root zone :30cm v) Daily consumption use of water : 17mm. (06 Marks)

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