ACTIVITIES REQUIRING FOR EIA
➢ In a natural ecosystem everything is related to everything else.
➢ Any change in one component may bring series of small / larger changes.
➢ Smaller changes absorbed by the system.
➢ Larger changes leave a permanent scar.
➢ Human activity pollute the biodiversity leads to extension an disappearance
of life from the system.
➢ With rapid expansion of human influence increasing destruction and
degeneration of wild life and environment.
➢ Agriculture, residential establishments, villages, townships may cause
adverse effects.
➢ Important human activities which cause environmental damages on a large
scale are usually subject to EIA. These activities are:
1. Construction activities
• Large construction projects (big dams, water reservoirs, highways, airports,
harbours) require EIA as they disturb the natural habitat and environment on
large scale.
• Mega dams are particularly in this connection.
• They are built by blocking natural water-ways in river-valleys.
• The sides of valley from a natural wall while the dam is built across the
course of river.
• Large areas of land within the valley are submerged which effect human
establishments agricultural fields, wildlife habitats, natural forests,
architectural monuments etc.
• The bottom of the reservoir filled up by silt and segments deposited by the
stagnant water.
• Thus ecological, hydrological, geological and socio-economic impacts are
produced by construction of mega dam.
• The reservoir of water represents a huge water-bomb perched at the top for
the people living downstream.
• Water in these dams used for mainly agriculture and power generation.
• Its benefit people of other localities than the people living in the valley.
2. Manufacturing activities
• Large number of industrial units causing environmental distress .
• Te most important aspects the impact of manufacturing industries on the
environment is the pollution caused by industrial effluents (waste water,
solids, gases).
• The amount of these discharges depend on the magnitude of production
which multiplies when a number of industries are concentrated.
➢ In a natural ecosystem everything is related to everything else.
➢ Any change in one component may bring series of small / larger changes.
➢ Smaller changes absorbed by the system.
➢ Larger changes leave a permanent scar.
➢ Human activity pollute the biodiversity leads to extension an disappearance
of life from the system.
➢ With rapid expansion of human influence increasing destruction and
degeneration of wild life and environment.
➢ Agriculture, residential establishments, villages, townships may cause
adverse effects.
➢ Important human activities which cause environmental damages on a large
scale are usually subject to EIA. These activities are:
1. Construction activities
• Large construction projects (big dams, water reservoirs, highways, airports,
harbours) require EIA as they disturb the natural habitat and environment on
large scale.
• Mega dams are particularly in this connection.
• They are built by blocking natural water-ways in river-valleys.
• The sides of valley from a natural wall while the dam is built across the
course of river.
• Large areas of land within the valley are submerged which effect human
establishments agricultural fields, wildlife habitats, natural forests,
architectural monuments etc.
• The bottom of the reservoir filled up by silt and segments deposited by the
stagnant water.
• Thus ecological, hydrological, geological and socio-economic impacts are
produced by construction of mega dam.
• The reservoir of water represents a huge water-bomb perched at the top for
the people living downstream.
• Water in these dams used for mainly agriculture and power generation.
• Its benefit people of other localities than the people living in the valley.
2. Manufacturing activities
• Large number of industrial units causing environmental distress .
• Te most important aspects the impact of manufacturing industries on the
environment is the pollution caused by industrial effluents (waste water,
solids, gases).
• The amount of these discharges depend on the magnitude of production
which multiplies when a number of industries are concentrated.
