The document presents a dam breach analysis project conducted by a group of students. It discusses analyzing the Kalyani dam located in Andhra Pradesh, India to estimate outputs from a potential dam breach including discharge, flooding routes downstream, and inundation maps. The objectives are to determine outflow hydrographs, estimate breach parameters, route peak discharges, and map inundation levels. Methodologies include breach modeling and flood routing simulations using HEC-RAS software. Input data on dam design, river contours, and rainfall are also described.

1. Dam Breach Analysis
Presented by
Akash Palve
Pratik Mulik
Prathamesh More
Swati Mohite
A Project on
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2. Hello, classmates!
We areGroup 13!
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3. Pratik
Group Leader
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Prathamesh
Researcher
Swati
Presentation
designer
Meet theGroup
Akash
Resource Collector

4. material dams.
Dams are structures constructed across rivers to
serve various purposes. With the progression of
time, various types of dams were constructed
based on the location and prerequisite of society
and designs were enhanced with the advancement
of technology. The types of dam commonly found
are:-
Earthen/Rockfill dams
Concrete and Multi-arch dams
Gravity Dams
Buttress dams
Concrete, steel, timber andcomposite
Introduction
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5. Abstract
TTheconstruction of Dams serve various purposes-
power generation, irrigation, flood control, etc.
WitThall tThebenefits, failure of dam structure can
cause tremendous losses by tThegeneration of
unforeseen floods in tThedownstream area.
To reduce these threats dam breach analysis
becomes necessary to predict inundation levelsand
flood-prone zones in the downstream area of the
dam.
Implementation of Dam breaThanalysis can benefit
tThepeople living downstream of tThedam against
floods witThtTheThelpof inundation maps wThicThcan be
generated by incorporation of results from dam
breaThanalysis witThGIS.
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6. AIM
Our First Aim
to estimate theoutput
discharge from the
reservoir
Our SecondAim
the route of the flood
wave downstream
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7. Objectives
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Our First Objective
Determination of outflow
hydrograph and the peak
discharge.
Our SecondObjective
Estimation of dam breach
parameters using
appropriate empirical
formulae. Our Third Objective
Routing of peak discharge and
prediction of hydrograph at
different sections in downstream
up to the point ofconsideration.
Our Fourth Objective
Mapping of Inundation levels.

8. Two major consequences of a dam failure
are:-
1.Life loss:
This loss occurs if the villages and the
residing families are washed away by the flood
resulting from dam-break.
2. Economic:
Economic loss is calculated in terms of revenue which
will be required to rebuild the washed away villages in
terms of infrastructure, and other allied facilities.
Need for Dam
Breach Analysis
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9. Methodology
Breach parameter estimation (breach
size/shape
and time of failure),
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Breach peak discharge andbreach
hydrograph
estimation,
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Breach flood routing
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Estimation of the hydraulicconditions
at critical locations.
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10. Dam break has been a theme of concern and research for a
long time.
study incorporates occurrence and proliferation of
breach with time and analysis of the subsequent flood.
extensive research has been done in the area of
prediction of breach shape and its alteration with time.
immense literature and case histories available about
dam-break modelling.
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LITERATURE REVIEW

11. Year of construction
constructed during the
year 1972 to1977
Seismic Zone
lies under seismic Zone-III
Kalyani dam
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Study area
a gravity dam
constructed across the
Swarnamukhi River at
Tirupati city in Chittoor
district of Andhra
Pradesh, India.

12. Design flood of the dam =1614 cumec with 25 Mm 3 as live
storage between hills which are part of Seshachalam Hill
ranges
Elevation of the area =50 to 600 m.
Has catchment area = 48.56 sq m
daily summer temperatures range = 36°C to 46 °C
The winter temperatures = 12 °C to 14 °C with an average
annual rainfall of 918.1 mm.
District receives an average annual of 438.0 mm rainfall
through the South-WestMonsoon
396.0 mm from North East Monsoon
Vegetation of thearea comprises dry deciduous mixed forest
with patches of moist deciduous forests in the valleys
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13. S t u d y a r e a
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14. Input data
for modeling
catchment area 25sq. km
Max Flood intensity is
8472.78mm/sec
Contour details of
Swarnamukhi River,
alignment details of riverand
dam.
Full supply
level, design flood
used in tThisstudy.
TThedata required for dam breaThanalysis using
HEC-RAS is geograpThic data tThatprovides a
pThysical description of tThearea and flow data
tThatprovides information about tThediscTharge of
tTheriver.
cross-section of tTheriver upstream and
downstream of tThedam,
daily discTharge,
cThannel geometry and daily rainfall collected
from tTheKalyani dam autThority.
TTheHEC-RAS and map window software was
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15. Bhakra Nangal Dam
Study area
built on Sutlej River
Year of construction
initially started in 1984
and completed in 1963
Seismic Zone
Zone -IV
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16. Highest straight gravity dam in India
with a height of about 207.26metersand
it runs across 168.35km
length of 518.25(1,700ft) meters and a
width of 9.1 meters (30ft)approximately
Elevation of area-226m
Temperature- 22C to 31C
Annual rainfall-786 mm
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17. References
https://iaeme.com/MasterAdmin/Jou
rnal_uploads/IJCIET/VOLUME_9_ISS
UE_5/IJCIET_09_05_041.pdf
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https://www.irjet.net/archives/V4/i
5/IRJET-V4I511.pdf