USN

2a.b.

c.

3a.

10cv55

Fifth Semester B.B. Degree Examination, Dec.20l4l Jan.20l5Hydrology and Irrigation Engineering

,!'

::

'Time: 3 hrs.

::::.

iN ::

,,:,

Note: 7. Answer uny FIW full questions, selectingatleast TWO questions from each part.

2. Assume missing data, tf uny.

1a.b.

d)()

oFo.

E

d.d()d()L

OX

= (')

boLcoo.=Nd$

b9!oe-OE!

3,a

aXg()

6ObotrU=>!inX

.?o

b-x-:o."oj

9E9oa Lii6C!o5:y>' (F

iouo=:f9:iD9-

lr<-i 6i(J

oz

o.

,,,,,,,.,',.::,,, PART - A

Explain,in.brief the different types of precipitation. (08 Marks)How do.y'tiu, estimate the average depth of precipitation by Thiessep polygon method?

.. .....", t,, t .,t,.,,,,:i'.,1 .:. . .:. ... (05Marks)The average aA4p-al rainfall in cm at 4 existing rain gauge gpjions are 105, 79,70 and 66cmrespectively. If ttie average depth of rainfall over the basin is to be estimated within 10%elror. Determine the"additional number of rain gauge required. (07 Marks)

-iDefine evaporation. What are the factors affecting e'#poration? t06 Marks)List the methods of estimation of evapotranspifation. Discuss Blancy Criddle method.

ri" ..,,',t'',',. - (06 Marks)For small catchment the infiltrati'on;rdtp at th; beginning of a storm was observed 90mm/hrand decreased exponentially to a congg$,nt rate of 8mm/hr after 2%hovr. The total infiltrationduring 2% fu was 50mm. Develqp-aHdrton's equation and determine the infiltration rate at30 min. ,,'..:,.,,, ,fi' (0g Marks)

1

With the aid of neat sketch.shbw the various con{pdnents of an observed flood hydrograph.(08 llarks)

b. what are the.rr., una,pfiSiiiiution of unit hydrographf::i (04 Marks)c. Following are the "or6ihates of a 3-hr unit hydrograph. Derive the ordinate of a 6hr unit

hydrograph"-,..'Tirne in hr 0 a

-) 6 I "t\:1"2,:'... i5 18 2t 24Ordinafes of 3 hr unit hvdro sraoh 0 1.5 4.5 8.6 12.fti: "9,4 4.6 2.3 0.8

.. ! ':r ".''

Define: i) Flood ii) Design flood.DisCuss in brief the following method of flood control :

i) Reservoir control ii) Construction of levels iii) Channel improvement. .,"r"(0.9 Marks)Define Flood routing and which are formulas used formulas used for storage versuselevation determination and outflow versus elevation determination. (07 Marks)elevation determination and outflow versus elevation determination.

' 'il,.rl

(06 Marks)irrigation;(08 Marks)

(08 Marks)

(04 Marks)

(07 Marks)

PART - Ba. Define h:rigation and what are the benefits and ill effects of irrigation.b. Discuss in brief the following types of irrigation: i) Flow irrigatioq ii) Direct

iii) Storage irrigation; iv) Inundation irrigation.c. Write a note on:

il Sewage irrigationir) Well irrigationiii) Supplementalirrigation.

I of2

(06 Marks)

www.bookspar.com | VTU NOTES | QUESTION PAPERS | NEWS | VTU RESULTS | FORUM | VTU BOOKSPAR APP

www.bookspar.com | VTU NOTES | QUESTION PAPERS | NEWS | VTU RESULTS | FORUM | VTU BOOKSPAR APP

10cy55

6 a. Describe with help of sketch various soil moisture zone. (06 Marks)b. Define: i) Saturation capacity; ii) Field capacity; iii) Permanent wilting; iv) Temporary

wilting. (08 Marks),,,i' c. Discuss in brief: i) Alluvial soil; ii) Black soil; iii) Red soil. (06 Marks)

,,,,.N-,.,.,@7:. u. Define Duty and delta and establish a relation between them. (06M*t6)1;i,8. What are the various methods of improving duty of irrigation water? (06 Marks)""""' r,,..1 The base period, duty at the field of different crops and area under each crop in the

' i,bpp-und area are given below. Find the required reservoir capacity to cater to the needs ofthtle,,1op. ;,.'.''",,,,...-. .,'"' (08 Marks)

*#&p-pBase Period (davs) Dutv @, field halcumec Area.rrqd6i the crop (Ha)

WhEat"' r20 1800 4800Susarceffig' 360 800 5600

Cotton " 200 1400 ,' 2400Rice '. ..,'- 120 900 ,r",it

fi, 3200

8a.b.c.

,,:::: ,:: | )1, \!!ii

How irrigation Canals are=d#ip;ned? (06 Marks)Discuss the drawback of Kenhd.il.$"s theory.lJlsouss ulc ulawDaur( Ur t\t,lrlxitcly S tIIsOIy./".X\a",ri , (U4 Vlarks)A channel section is to be designed,fo: thffihowing data:Discharge Q: 5 cumes .rSilt factor f : 1.0 ,..'::'::::';l ..

1

Side slope : Llz (LI): I (V) .,fi:"$""Also determine the bed slope oftlp bhannel by Laccy method of channel design. (10 Marks)

-',

?\[-3ar,,,q

req.I

2 of2

www.bookspar.com | VTU NOTES | QUESTION PAPERS | NEWS | VTU RESULTS | FORUM | VTU BOOKSPAR APP

www.bookspar.com | VTU NOTES | QUESTION PAPERS | NEWS | VTU RESULTS | FORUM | VTU BOOKSPAR APP