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Hydrology & Irrigation (April 2010)

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Total No. of Questions : 12] [Total No. of Pages : 3 [3764]-101 P1462 B.E. (Civil) HYDROLOGY AND IRRIGATION (2003 Course) Time : 3 Hours] [Max. Marks : 100 Instructions to the candidates : 1) Answer any 3 questions from each section. 2) Answers to the two sections should be written in separate books. 3) Neat diagrams must be drawn wherever necessary. 4) Figures to the right indicate full marks. 5) Use of electronic pocket calculator is allowed. 6) Assume suitable data, if necessary. SECTION - I Q1) a) The data from an isohyetal map of a catchment is shown in following tableIsohyet (mm) 250 300 350 400 450 500 Area covered by Isohyet (km2) 500 400 300 200 100 Determine the average depth of precipitation over the catchment area of 500 km2. [8] b) Explain any three methods of determining average rainfall over a catchment. State their advantages and limitations. [8] OR Q2) a) A catchment area has 5 raingauge stations. These gauges recorded the annual rainfall as Station Rainfall (mm) A B C D E 1300 1420 1180 1080 1650 For 5% error in estimation of average rainfall, determine the minimum number of additional raingauge stations required to be established in the catchment. [8] b) With the help of conceptual sketch, differentiate between infiltration and percolation state, how infiltration is measured in field. [8] P.T.O. Q3) a) b) Q4) a) b) Q5) a) b) Q6) a) b) With help of sketch, explain concept and use ofi) index. ii) W index. [8] State any four factors affecting evaporation. Also, state any four measures to control the evaporation. [8] OR Explain with sketch, the ISI standard Pan Evaporimeter. [8] Explain any four factors affecting the infiltration. [8] Define Unit Hydrograph. State step by step method of derivation of Unit Hydrograph. [10] Explain briefly: i) Maximum Probable Flood. ii) Design Flood. iii) Causes of Flood. iv) Factors affecting Flood. [8] OR Explain concept of synthetic Unit Hydrograph. State its advantages.[10] Define flood routing. State assumptions made in routing a flood in a reservoir. [8] SECTION - II Q7) a) b) Q8) a) b) [3764]-101 Write the detailed step by step procedure to estimate design discharge at head for designing a canal. [8] Define: i) Duty. iii) Consumptive use of water v) Relation between duty & delta. OR [10] ii) Delta iv) Irrigation Intensity. State any four causes & four ill effects of water logging. Also, state corrective methods to reclaim water logged area. [8] Differentiatei) Lift Irrigation and Flow Irrigation. ii) Drip Irrigation and Sprinkler Irrigation. [10] 2 Q9) a) b) Explain salient features of National water policy. Explain functioning of water users cooperative society in PIM. OR Q10)a) b) Explain functioning of Global water partnership. [8] Enlist different Irrigation acts is state of Maharashtra & highlight salient features of any one of them. [8] Q11)a) Differentiate- b) Q12)a) b) [8] i) Artesian well and Flowing well. ii) Confined aquifer and Water table aquifer. State Darcy s law and assumptions made in it. Also, state procedure of pumping test with help of sketch. [8] OR Differentiate[8] i) Tube wells and Open wells. ii) Specific yield and safe yield. Derive an expression for steady state discharge through a tube well fully penetrating a confined aquifer. [8] Y [3764]-101 [8] [8] 3

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Additional Info : April 2010 Examination - Hydrology & Irrigation (2003 Course)
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