# Water Resources Engineering-II Dec 2011

UNIT -I

1. Design a Sarda type fall for the following data : U / S

(i) Full supply discharge = 35 cumecs.

U/S 218.30m

(ii)Full supply level U/S 1.8 m (in) Full supply depth D/s 1 8m .

(iv) Bed width ^/c,

(v) Bed level u/g 215.00m ‘

(vi) Drop = 1.5 m

Design the floor by Bligh’s theory taking coefficient of creep=8. Check the design by Khosla’s theory. Safe exit

gradient is Draw a neat sketch of the cross section.

OR

1 (a) Differentiate between aqueduct and syphon aqueduct. What

are the considerations made in selection of suitable type of cross drainage work ?

(b)   Briefly discuss the features of design of cross drainage works.

UNIT-II

2 (a) Describe the Khosla’s theory and derive the expression

(b) Compare the Bligh’s and Khosla’s theories for the design of impervious floor.

OR

2 Design a vertical drop weir on Bligh’s theory for the following site conditions :

(a) Maximum flood discharge = 3000 cames.

(b) HFL before construction = 285.0 m

(c) D/S bed level = 278.0 m

(d) F.S.L. of canal = 284.0 m

(e) Allowable afflux =’ 1 m

(f)  Coefficient of creep = 12

Check the design by Khosla’s theory.

UNIT-III

3 (a) Describe the various forces acting on a gravity dam with neat sketches.

(b) Describe the swedish circle method of slope stability analysis for the upstream side of an earth dam under sudden drawdown condition.

OR

3 (a) Describe the points of consideration for the selection of site for a dam.

(b) Describe the phreatic line and its importance in an earth dam. Explain the graphical method of drawing flow net in an earth dam.

UNIT-IV

4. (a) Describe an ogee spilway along with the design criteria of its crest profiles.

(b) Describe the main components of a hydroelectric scheme.

OR

(a) Describe various types of spilways with neat sketches.

(b) Describe the method of assessement of water power potential.

UNIT-V

5    Describe the environmental impact assessment of a large water resource project.

5. Write short notes on the following :

(i)  Reservior sedimentation