Disaster Management & Flood Control – An Initiative by Pune Municipal Corporation A Presentation by Smt.
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Disaster Management & Flood Control – An Initiative by Pune Municipal Corporation
A Presentation by
Smt. Rajlakshmi Bhosale Mayor, Pune
CONTENTS
1 INTRODUCTION 2 FLOOD SCENARIO IN PUNE 3 CAUSE AND EFFECT 4 CURRENT FLOOD PROTECTION MEASURES 5 FUTURE ACTION PLAN FOR FLOOD CONTROL & DISASTER MANAGEMENT
Introduction
“Punyanagari The City of Virtuous Deeds”
River and the City
Pune traces its origins to an agricultural settlement by the name of Punnaka in the 8th century AD; also called Punyapur or Punyanagari, “The City of Virtuous Deeds” The city is built on the confluence of the three rivers Mutha, Mula and Pavana. These Rivers were believed to have Mythic Cleansing Powers The Rivers formed the city’s lifeline and no other city in the country can boast of having three Rivers running through it KHADAKWASLA DAM LAKDI PUL BUND GARDEN BRIDGE
Importance
8th Largest Urban Agglomeration in India Population – 4.7 million growing @ 6% Cultural Capital of Maharashtra ‘Oxford of the East’ ‘Detroit of India’ Rapidly Growing Economy powered by IT, Manufacturing and Services Twenty bridges cross the river along 27 km of lenght
A Disaster Strikes Pune at 2:00pm on 12
th
July 1961 !!!
Panshet and Khadakwasla Dam Failure results in a Major Flood in the city of Pune
FLOOD SCENARIO IN PUNE
History of Floods in Pune
Discharge in Cumecs 3500.00
3250.00
3000.00
2750.00
2500.00
2250.00
2000.00
1750.00
1500.00
Highest flood record 3211cumecs Panshet Dam Failure (1961) 1250.00
1000.00
750.00
500.00
250.00
0.00
19 40 19 43 19 46 19 49 19 52 19 55 19 58 19 61 19 64 19 67 19 70 19 73 19 76 19 79 19 82 19 85 19 88 19 91 19 94 19 97 20 00 20 03 20 06 Years
Flood Frequency Analysis was conducted for 1940 to 2007 of the maximum discharge data from Khadakwasla
The 1958 flood with a magnitude of 3211 cumecs is the highest flood recorded.
The mean annual peak flood is about 1165 cumecs.
Every decade had recorded one severe flood during the last six decades (1944, 1958, 1961, 1976, 1976, 1983, 1997 and 2005).
The post 1961 period shows a significant decline in the peak flood magnitudes and increase in the flood variability. This could be attributed to the increased control of dams located on the river, such as Temghar and Varasgaon that were constructed during the post-1961 period.
CAUSE AND EFFECT
Causes
Reduction in Carrying Capacity of the river Encroachment in river draining into the rivers and tributaries (nullahs) Disposal of Debris and solid wastes including plastics Lack of Remote Rain Gauging and Telemetric Early Warning System
Effects
I.
II.
III.
Displacement of Families in the river banks Destruction of private property on the river banks Destruction of Biodiversity on the river banks IV.
V.
Disruption of Transport and communication systems Destruction of drainage and sewage system VI.
Eroding of river banks VII.
Adverse effect on Public Health
Families Rehabilitated during Floods Year
2004 2005 2006 2007
No. of Families Affected by Floods
1623 5345 5098 200 Source : Slum Department, PMC
Improvement in our Disaster Management Ability has resulted into a large reduction in the number of Flood Affected Families
CURRENT FLOOD PROTECTION MEASURES
Disaster Management Initiative by Pune Municipal Corporation (PMC)
2006 - 2007 PMC embarked upon preparation of a a comprehensive Disaster Management Plan Involving all agencies of the local self government law enforcing agencies, state govt and education institutes MAY 2007 DMP WAS PROMULGATED
Engineering Measures for Disaster Management by Pune Municipal Corporation (PMC)
Increase in River carrying capacity by Dredging of 1.50 MCM of silt Excavated Debris is reused for construction of roads Protection Construction of 1.50 km of protection wall to protect 10 major flood prone areas River flow (reduced afflux) Removal of an old Stone masonry bund Removal of central section (100m long and 5 m high) of Bundgarden bund
Organisational Structure for Disaster Management
Khadakwasla Dam flows above 45000 cusec Water level of Mulshi dam start increasing above 1980 ft Irrigation Department Mulshi Collector office Flood control Department
Municipal Commissioner and Police Commissioner work on next action plan
Public Relation officer Media (hourly updates) Pune Municipal Corporation Authority Each hour Municipal Regional Offices Take Action PMT, Road Traffic, health dept etc NGO, Social services Organisation etc
Regional Offices
Organisational Structure …..contd
Officer
Role Played by Regional Offices
Enumeration of rehabilitated people At present 39 Rehab Centres are available Identify rehabilitation places Availability of rooms, water supply and electricity Co ordination with NGOs, helping groups etc Provide Food, sanitation, medicines, drinking water
Benchmarks for Initiation of Disaster Management Plan
Discharge from Khadakwasla
1132.7 cumecs (40000 cusecs) 1415.9 cumecs (50000 cusecs)
Action done
DMP Flood Alert DMP operations initiated
PMC Departments working towards Flood Management
Fire Brigade Authority River Improvement and Garden Superintendent Department Pune Maha Nagarpalika Parivahan Mahamandal Ltd Health Department Vehicle Department Public Relation Department Education Department Electricity Department Irrigation Department
Fire Brigade Authority
Training of experts from this department to other officer for planning & evacuation.
Evacuation of people and property from site Supply of various equipment like pumps, cranes, boats etc where ever required Lifting of collapse articles like fallen trees etc during heavy rains
River Improvement and Garden Superintendent Department
Desilting of almost 1.50 MCM Deposition of debris for construction of DP road Disposal of excess debris at relevant location Construction of 1.50 km of protection wall which covers almost 10 major flood prone areas
Pune Maha Nagarpalika Parivahan Mahamandal Ltd.
Release of public transport Make vehicles available wherever required Make drivers available Get updates about traffic diversions and inform it to the drivers.
Keep stock of fuel and other material required
Health Department
Make Doctors, Pharmacist, auxiliary nurse etc available.
Supply medicines Ambulance
Vehicle Department
Make wireless vehicles, truck and drivers available Coordination with fire brigade authorities through these wireless vehicles
Public Relation Department
At as a communication medium within the government and public Public awareness Information to media (press, channels etc)
Education Department
Make school and college available during floods Make infrastructure in school available Teachers and other staff also provide help in this respect
Electricity Department
As the electric supply is completely damage during floods provide generators to evacuation teams Provide temporary electric wiring at rehabilitation centers Provide emergency lamps
Irrigation Department
Control discharge at each of the dams Supply flood update to Flood control department of PMC
FUTURE ACTION PLAN FOR FLOOD FORECASTING & DISASTER MANAGEMENT
Salient Features
1.
Installation of Remote Rain Gauging, level gauging and telemetry system for early warning to control peak discharge from Khadakwasla to within during the rainy season 50,000 Cusecs 2.
Prevent encroachment of the river and streams by declaration of Biodiversity Restoration Zones along the banks 3.
Use of Gabions/Reno Mattresses on river banks for stabilisation and allow percolation of water
Mapping and Delineation of the flood-prone area by use a probability based analysis wherein systematic records and historical information on past flooding are used to develop a relation of probability of occurrence versus magnitude.
Development Zone Development Zone Designation of Floodway (River Channel) and High Flood Level Components
Comprehensive Non Structural Flood Management System The proposed system can be divided into three important sub systems viz.
Telemetry System Management Information System Decision Support System
Telemetry System
data
such as
gathers hydrological and meteorological
Rain fall data from rain-gauge stations in the catchment Water level data from river gauge stations Reservoir level data from level sensors installed at the reservoirs Data is gathered without any human intervention Collected data is then presented to the
Management Information System and the Decision Support System
Based on the received data and conditions/parameters/rules the system computes required for controlling discharge of water the pre-fed information
Conclusions
Our experience of PMC has shown that initiative by the local self governing body can control & reduce the magnitude of disaster and effectively manage a disaster