REVIEW ON ENVIRONMENTAL IMPACT ASSESSMENT FOR CHENNAI METRO RAIL PHASE 2
REVIEW ON ENVIRONMENTAL IMPACT
ASSESSMENT FOR CHENNAI METRO
Introduction of India
• 5,000 year old civilization.
• 325 languages spoken-18 oficial languages.
• 29 states & 8 union territories.
• 3.28 milion sq km of area.
• 7516 km of coastline.
• Population 1.393 billion (2021 Census).
• 4th largest Economy, Fastest growing IT superpower.
• Indian Railways the biggest employer in the world.
BREIF OVERVIEW OF CHENNAI CITY
• 4th Largest city in India Tamil Nadu as the Capital.
• Population nearly 8 million.
• Located on the south–eastern coast of India in Bay of
• Financial hub of renowned financial institutions like world
bank,HSBC,& Citi Bank.
• The study area is lies between Latitude of 13°10' N to
12°49' N and Longitude of 80°10' E to 80°14' E.
Year Development of EIA
1976-77 Planning Commission asked the Department of Science
and Technology to examine the river-valley projects from
an environmental angle. This was subsequently extended
to cover those projects, which required the approval of the
Public Investment Board.
1994 Union Ministry of Environment and Forests (MOEF),
Government of India, under the Environmental (Protection)
Act 1986, promulgated an EIA notification making
Environmental Clearance (EC) mandatory for expansion or
modernisation of any activity or for setting up new projects
2006 The notification makes it mandatory for various projects
such as mining, thermal power plants, river valley,
infrastructure (road, highway, ports, harbours and airports)
and industries including very small electroplating or foundry
units to get environment clearance.
The EIA Process
• Screening: First stage of EIA, which determines whether the proposed project, requires an EIA and if it
does, then the level of assessment required.
• Scoping: This stage identifies the key issues and impacts that should be further investigated. This stage
also defines the boundary and time limit of the study.
• Impact analysis: This stage of EIA identifies and predicts the likely environmental and social impact of
the proposed project and evaluates the significance.
• Mitigation: This step in EIA recommends the actions to reduce and avoid the potential adverse
environmental consequences of development activities.
• Reporting: This stage presents the result of EIA in a form of a report to the decision-making body and
other interested parties.
• Review of EIA: It examines the adequacy and effectiveness of the EIA report and provides the
information necessary for decision-making.
• Decision-making: It decides whether the project is rejected, approved or needs further change.
• Post monitoring: This stage comes into play once the project is commissioned. It checks to ensure that the
impacts of the project do not exceed the legal standards and implementation of the mitigation measures are
in the manner as described in the EIA report.
• The study area for the EIA study is the area along the Metro corridors and depot locations.
Two priority metro corridors have been proposed for Chennai metro Phase-II which are listed
• Corridor-3 (Madhavaram Milk Colony to Sholinganallur): have been proposed in
priority Corridor-3 consisting of 10 stations as elevated and 30 stations as underground.
• Corridor-5 (Madhavaram Milk Colony-CMBT): Total of have been proposed in
priority Corridor-5 consisting of 1 at grade, 5 stations as elevated and 12 stations as
Environmental Baseline Data
• Environmental baseline data describes the existing environmental settings in the study area.
The objective of Environmental Impact Assessment (EIA) is to ascertain the baseline
environmental conditions and then assess the impacts as a result of the proposed project
during various phases of the project cycle. The environmental baseline data has been
• Land Environment (Physiography, Soils, Geology and Minerals)
• Water Environment (Water resources, water use and quality)
• Air Environment (Meteorology and Ambient Air Quality)
• Noise Environment (Noise level)
• Ecological Environment (Flora and Fauna)
• Socio-Economic environment (Demography and Socio-Economics, etc.)
Environmental Management Plan (EMP)
• The Environmental Management Plan (EMP) is a guidance document used to measure and
achieve compliance with a project's environmental protection and mitigation requirements,
which are typically required for project permits/approvals
• EMP consists of four major components: commitment and policy, planning, implementation,
and measurement and evaluation.
• Identification of mitigating strategies, such as prevention and control, for each environmental
component,as well as a restoration and resettlement strategy.
• Establishment of a monitoring system to ensure that the conditions are met.Development of
an implementation strategy, including timetables and resource allocation
Purpose Of EMP
• It describes how environmental management is reported and performance is evaluated on a regular basis.
• Aids in reducing environmental disturbance (physical, biological, ecological, socioeconomic, cultural, and
• Combat pollution by monitoring air, noise, land, water, waste, energy, and natural resources.
• Flora and fauna that are sensitive or endangered must be protected, to stop land degradation.
• Adopt best practises in waste management for all types of waste (liquid and solid), with a focus on waste
prevention, minimization, recycling, treatment, and disposal.
• Employees and contractors should be trained and made aware of their environmental obligations and compliance.
• Reduce environmental risk and improve health, safety, and the environment (HS&E).
• Increase efficiency by reducing consumption and conserving energy-depletable resources.
• An EMP also includes a plan that addresses the following questions: what, where, when, how, and who.
• Creating the reporting system that will be used during construction.
• The EMP also serves to highlight specific requirements that will be monitored during development, and if
environmental impacts are not satisfactorily prevented or mitigated, corrective action will be required.
Format of the Report
• Chapter2 presents project description.
• Chapter3 summarises environmental baseline conditions.
• Potential negative and positive impacts are presented in Chapters4 and 5
• Environmental management plan has been presented in Chapter6.
• Chapter7 covers environmental monitoring programmes.
• A summary of the costs of environmental management and monitoring
programmes is presented in Chapter8.
• Social Impact Assessment and preliminary Resettlement Action Plan will be
presented as part of a separate Report.