project on farakka barrage

1. UNIVERSITY INSTITUTE OF TECHNOLOGY,
THE UNIVERSITY OF BURDWAN
A
PROJECT ON
Presented By
MANORANJAN ROY
Roll No - 20145033

2. FARAKKA BARRAGE PROJECT
(SERVING THE NATION SINCE 1975)

3. INTRODUCTION
 Brief Background : Under the M/o, WR, RD & GR.
 Location . : Farakka in West Bengal
 Project Period : 1961 to 1975

4. PURPOSE
 Constructed by HCC
 Gate details : ( total no of gate are 109)
 Construction cost : ₹156.49 crore (US$24 million)

5. BASIC COMPONENT
OF
FARAKKA PROJECT
A. Farakka Barrage: 2.24 kms
long, No. of Bays: 109
B. Feeder Canal: 38.3 kms
long , Q:1133 cumecs
(40,000 cusecs)
C. Jangipur Barrage: 212.70m
long , No. of Bays: 15

6. MAIN OBJECTIVES OF FBP
I. To divert adequate quantity of Ganga
waters into Bhagirathi – Hooghly.
II. Sweet water supply to adjoining areas
including Kolkata.
III. To communicate the North-Eastern
States with rest of the country.

7. DIFFERENT PARTS OF BARRAGE

8. DIFFERENT PARTS OF BARRAGE

10. DESIGN OF BARRAGE
THE DESIGN OF ANY
HYDRAULIC STRUCTURE
COMPRISES OF TWO STEPS:
• HYDRAULIC DESIGN
( BY USING EMPIRICAL
FORMULAE).
• STRUCTURAL DESIGN
(ANALYSED FOR STRESSES
UNDER DIFFERENT LOADS AND
REINFORCEMENT OR OTHER
STRUCTURAL DETAILS ARE
WORKED OUT ).

11. HYDRAULIC DESIGN
FLOOD DESIGN
Dependent on Rainfall data
The Discharge Design :
76455 cumecs
Max Flood level : 26.1 m
MWL Calculation : By Area
Slope Method

12. Ganges Basin
Station: Farakka
Hydrograph
Month MeanQ
m3/s
MinQ
m3/s
MaxQ
m3/s
Month
Jan 2827.0 2265.0 4224.0 Jan
Feb 2419.0 1685.0 3508.0 Feb
Mar 2014.4 1411.0 2641.0 Mar
Apr 1751.0 1228.0 2176.0 Apr
May 1984.5 1359.0 2981.0 May
Jun 4314.4 1181.0 10199.0 Jun
Jul 20793.4 12090.0 33922.0 Jul
Aug 43030.0 19042.0 65072.0 Aug
Sep 36899.3 19331.0 52121.0 Sep
Oct 17592.9 7131.0 31053.0 Oct
Nov 6836.7 3831.0 10719.0 Nov
Dec 3984.5 3042.0 5399.0 Dec
Station Data

13. HYDRAULIC DESIGN
UPLIFT PRESSURE CALCULATION
The uplift pressure at any point of floor of
Barrage is computed on the basis of khosla’s
Theory for permeable foundation of infinite
Depth .
• The necessary corrections due to the effect
of The upstream & down stream cut offs,
Intermediate cut offs(if any), interference of
Cutoffs , thickness of floor and slope of the
Glacis shall be applied.
• Thickness of floor of the barrage arrived at
Various locations so as to with stand the
uplift Presure head.

14. HYDRAULIC DESIGN
SCOUR SLUICES
Scour is likely to occur in erodible soils
such as clay , silt,sand.
• The depth of scour may be calculated
from the Lacey’s formula which is as
follows.
• As per cl. 19.1 of i.S:6966(part i) -1989.
• R = 0.473 (Q/f)1/3
When looseness factor is more than 1
• R = 1.35 (q2/f )1/3
When looseness factor is less than 1

15. STRUCTURAL DESIGN
DESIGN OF CUT OFFS
The u/s and d/s cut offs of
the diversion Structure .
The sheet pile cut offs design

16. STRUCTURAL DESIGN
DESIGN OF THE PIER :
Thickness of this pier
The weight of the pier
ROAD BRIDGE:
Designed for the relevant IRC class .
DESIGN OF ABUTMENTS:
Designed for Lateral forces
Design type as Function.
DESIGN OF WING WALLS AND RETURNs:
The top width of the wing and returns >600 mm.
The flank wall designed .

17. FLOW THROUGH UPSTREAM &
DOWNSTREAM

18. FARAKKA WATER SHARING
TREATY
Availability at
Farakka
Share of India Share of
Bangladesh
70,000 cusecs or less 50% 50%
70,000 – 75,000 cusecs Balance of the flow 35,000 cusecs
75,000 cusecs or more 40,000 cusecs Balance of the flow

19. ACTIVITIES
Replacement of distressed
gates
Maintenance and protective
measures of Feeder Canal
(38.38 Km. in length)
Maintenance & protective
measures of bank & bed of
river Ganga in upstream of
Farakka Barrage ( upto 12
Km.) and in the d/s upto 6.9
Km.

20. CONCLUTIONS
Harmonization between human and
environment and between India and
Bangladesh through the improved
watershed management.

21. REFERENCE
https://en.wikipedia.org/wiki/Farakka_Barrage
http://www.compositerunoff.sr.unh.edu/html/Polygons/P2846
800.html
http://www.ssvk.org/koshi/reports/treaty_on_farakka_india_b
angladesh_4_ganga_river_water.pdf
http://wrmin.nic.in/forms/contentpage.aspx?lid=163
http://nptel.ac.in/courses/105105110/pdf/m4l02.pdf