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.-Marks: 100

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a. Differentiate between: i) Evaporation.and Evaootranspiration ii) W - index and $ index iii) AET and PET iv) Infiltrometer and Lysimeter. (08 Marks) b. What are the measures taken to reduce the e aporation? (06 Marks) c. A twelve hour storm rainfall with the fo Hawing depths in cm occurred over a basin: 2,2.5,7.6,3.8, ]0.6,5,7,10,6.4, {_8..: l{ind ' .4.)) The surface runoff resulting from. thev~.bove stonn is /equivalent to 25.5cm of depth over the basin. Estimate the average infiltrafi6h index. (06 Marks) r; ~/.

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Define Flood hydrograph an~~e'xp,lain the different co'in'PO~?Rtsof flood hydrograph.

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b. What ISa Master depletion curve? What IS ItS use? - ...~" (04 Marks) c. The ord inates of a storm hydrograph due to 6h isolated stoif ..js~g.iven. Obtain the ord inates ..:-:..J.\ it hvd tl catc h ment, Iif ItS i area IS . 423k m .,,--;' y rograpi h for or the (10 Ma rks) 0 f6h unit 6()) 36 I 42 ,72 ;66) Time (hr) 6 ' 12 48 54 78 84 90 0 18 24 30 Discharge 10 32, 88 116 102 85 71 59 47 39 32 26 \22 18 15 10 // (m3/s) v

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a. Define Flood. List the factors influencing flood. i (05 Marks) b. Explain the rational formula of estimation of flood. '-<~.r:;(05 Marks) c. The values for K and x for a river reach were found to be 12h and 0.2 resf~ctiyely, Route the following flood through the reach. Inflow values at 6h interval are (in m /s ~ <. ~- / 10, ~O, 50,60,55,45,35,27,20, IS and 13, 'v 10 1arks)

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PART-B a. Define Irrigation. What is the necessity for irrigation? b. Explain briefly: i) Systems of Irrigation ii) Environmental II

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impacts of irrigatiQi. (14 Marks)

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toe a. Give the classification of Indian soils. b. Define'Irrigation efficiencies. c. What are the different methods of maintaining soil fertility?

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Base period (days) 320 90 120 120 120

Area (ha' Duty (ha/cumec) 850/> 580 120 600 500 360

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Overla for sugarcane inBu Wheat (Rabi) Ba'ri (Monsoon) Veg (Hot weather)

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a. Define Duty' .):Vhatare the factors affecting duty of water? Explain. (10 arks) b. Table gi -es t;hf(, necessary data about the crop, their duty and area, under each crop, commanded bOla canal taking off from a storage tank. Taking time factor for the canal 13/20, calculate the discharge required at the head to the canal. If the capacity factor is 0.8, determine the desrg/ discharge. (10 Marks)

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a. What are the consideration for ali~nm~l)t of canals? b. Design the canal for the discharge of 10 cume with silt factor 1.0. Side slope - 0.5H : IV.

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(10 Marks) (10 Marks)