35
2.6 Matrix
This method can be considered to be an extension of checklist. The rows of a matrix
(Table 2.7) indicate impact, while the columns indicate the project activities. Impact
prediction using two dimensions will improve the quality of prediction and help to
design mitigation plans. −
2.7 Network
The network method (Fig. 2.8) is a pictorial attempt to analyse the series of impacts
that might have been triggered by project activities. The network method is best
suited for single-project assessments, but not for cumulative assessments.
2.8 Overlays
This method relies on a set of maps (prevailing waterborne diseases, airborne diseases, healthcare facility, air quality, water quality, etc.) of a project area.
Overlay of existing and projected impact using geographic information system
(GIS) would provide an idea of population exposed to different types of risk like the
following:
Table 2.3 Examples of simple checklist with respect to a thermal power plant during an operation
phase
Sl.
No. Parameter
Nature of
impact
(a)
Transportation of coal
Negative
(b)
Grinding coal
Negative
(c)
Feeding coal to boilers
Negative
(d)
Electricity transmission
Negative
(e)
Operation of cooling towers
Negative
(f)
Withdrawal of water from water source
Negative
(g)
Discharge of waste water
Negative
(h)
Waste management
Negative
(i)
Ash management
Negative
(j)
Air pollution
Negative
(k)
Providing subsidised nutritious food to workers
Positive
(l)
Maintenance of green belt
Positive
(m)
Extending hospital of thermal plants to nearby villages towns
Positive
(n)
Extending healthcare activity to faraway settlements by mobile clinics
under corporate social responsibilities
Positive
(o)
Distribution of free nutritious food to nearby school children
Positive
2.8 Overlays
2.6 Matrix
This method can be considered to be an extension of checklist. The rows of a matrix
(Table 2.7) indicate impact, while the columns indicate the project activities. Impact
prediction using two dimensions will improve the quality of prediction and help to
design mitigation plans. −
2.7 Network
The network method (Fig. 2.8) is a pictorial attempt to analyse the series of impacts
that might have been triggered by project activities. The network method is best
suited for single-project assessments, but not for cumulative assessments.
2.8 Overlays
This method relies on a set of maps (prevailing waterborne diseases, airborne diseases, healthcare facility, air quality, water quality, etc.) of a project area.
Overlay of existing and projected impact using geographic information system
(GIS) would provide an idea of population exposed to different types of risk like the
following:
Table 2.3 Examples of simple checklist with respect to a thermal power plant during an operation
phase
Sl.
No. Parameter
Nature of
impact
(a)
Transportation of coal
Negative
(b)
Grinding coal
Negative
(c)
Feeding coal to boilers
Negative
(d)
Electricity transmission
Negative
(e)
Operation of cooling towers
Negative
(f)
Withdrawal of water from water source
Negative
(g)
Discharge of waste water
Negative
(h)
Waste management
Negative
(i)
Ash management
Negative
(j)
Air pollution
Negative
(k)
Providing subsidised nutritious food to workers
Positive
(l)
Maintenance of green belt
Positive
(m)
Extending hospital of thermal plants to nearby villages towns
Positive
(n)
Extending healthcare activity to faraway settlements by mobile clinics
under corporate social responsibilities
Positive
(o)
Distribution of free nutritious food to nearby school children
Positive
2.8 Overlays