JAWAHARLAL NEHRU TECHNOLOGICAL UNIVERSITY HYDERABAD B.Tech III WATER RESOURCES ENGINEERING Previous Question Paper (January/February - 2023 - R16)

Define Probable Maximum Precipitation.

List methods used for control of evaporation in reservoirs.

What is the importance of time of concentration in hydrograph analysis?

What are the limitations of unit hydrograph theory?

State Darcy’s law and list its limitations.

What do you mean by well losses?

List ill effects of irrigation.

What do you mean by permanent wilting point?

Differentiate between alluvial and non-alluvial canal.

What are the requirements of good lining material?

Explain the various components of hydrological cycle with help of a sketch.

There are 8 rain gauges in a catchment; one of them is self-recording type and the remaining are standard type. The error in the mean rainfall estimation (E) is 5%. The annual rainfall at the 8 stations is given below. Determine the number of additional rain gauges required to be installed.

How do you measure evaporation Using Pan and Water Budget?

A 6 hr storm produced rainfall intensities of 7, 18, 25, 12, 10 and 3 mm/hr in successive one-hour intervals a basin of 800 sq.km. The resulting runoff is observed to be 2640 ha.m. Determine Ø - index for the basin.

What is hydrograph? Explaining the possible shapes of hydrographs, explain the factors affecting the shape of the hydrograph.

The ordinate of 4-hr unit hydrograph are given below. Compute the ordinates of 8-hr unit hydrograph.

Distinguish between flood hydrograph and unit hydrograph. Explain the assumption of unit hydrograph.

A 12-hr unit hydrograph (UH) of a catchment is triangular in shape with base of 144 hr and peak discharge of 23 m3/s. Calculate the area of the catchment.

Derive an expression for discharge from a well which is fully penetrate in confined aquifer.

A sandy layer 10m thick overrides an impervious stratus. The water table is in the sandy layer at a depth of 1.5m below the ground surface. Water is pumped out from the well at the rate of 100lps and drawdown of the water table at radial distance of 3 m and 25 m is 3 m and 0,5m respectively. Determine the coefficient of permeability of the aquifer.

Design a tube well with the data given below. Yield required = 0.20 cumecs; thickness of confined aquifer = 40 m; Radius of circle of influence = 300 m; permeability coefficient = 80 m/day; drawdown = 6m

Explain with neat sketch, occurrence of groundwater at various locations below the earth surface. Explain clearly, artesian well, confined aquifer, permeability and specific yield.

Explain the terms (i) Duty (ii) Delta and (iii) Base period. Derive the relation between Duty, Delta and Base period.

The GCA for an irrigation canal is 20,000 hectares out of which 75% is CCA. The intensity of irrigation is 40% for Rabi and 10% for rice. If kor period is 4 weeks for Rabi and 2.5 weeks for rice, determine the outlet discharge. Outlet factors for Rabi and rice may be assumed as 1800 ha/cumecs and 800 ha/cumecs. Also calculate delta for each case.

Define: (i) field capacity (ii) ultimate wilting point (iii) available moisture.

What is consumptive use of water? Describe any one method in detail.

Explain: Water application efficiency, Water conveyance efficiency and water distribution efficiency.

Write a detailed note on water loss in canals.

Explain classification of Irrigation canal in detail.

Design an irrigation channel by Kennedy’s theory to carry a discharge of 45 cumec. Take N = 0.0225 and m = 1.05. Bed slope is 0.2m per kilometer.