Match List-I (Tool /Technology) with List-II (Use in EIA) and select the correct

Question

Match List-I (Tool /Technology) with List-II (Use in EIA) and select the correct

code:

List-I

List-II

i. GIS

a. Sound levels

ii. Remote sensing

b. Mapping/Overlaying

iii. Noise-software

c. Time-series monitoring

iv. Water-network

d. Satellite land-cover

Choose the correct match :

1. A. i-b, ii-d, iii-a, iv-c (Correct answer)
2. B. i-c, ii-b, iii-a, iv-d
3. C. i-b, ii-a, iii-c, iv-d
4. D. i-d, ii-b, iii-a, iv-c

Correct Answer

Option A — i-b, ii-d, iii-a, iv-c

Detailed Solution & Explanation

The correct answer is i-b, ii-d, iii-a, iv-c.

Key Points

• Each tool does one job in an EIA:
  • i. GIS - b. Mapping and overlaying, superimposing land use, hydrology and settlement layers to locate conflicts.
  • ii. Remote sensing - d. Acquiring surface data from satellite or airborne sensors over wide areas and repeated dates.
  • iii. Noise-modelling software - a. Sound levels, predicting decibel contours around a source.
  • iv. Water-network modelling - c. Time-series monitoring of flows and quality through a distribution or drainage network.

Additional Information

• GIS and remote sensing are complementary rather than interchangeable, and questions frequently exploit the confusion: remote sensing acquires the spatial data, GIS analyses and overlays it.
• Noise prediction models propagate sound from a source using distance attenuation, barriers and ground effects, producing contour maps that are then compared against the residential and silence-zone limits.
• Water-network models are used both for supply systems, checking pressures and residual chlorine, and for drainage, checking whether a sewer will surcharge at peak flow.
• The common thread is that all four are predictive tools: they let an assessor estimate an impact before it occurs, which is what distinguishes assessment from monitoring.