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4. Getting to Know your EIA Report

Virtual Tutorial

  1. Can you show me the approach in quantifying the noise impacts?
  2. How can I quantify the air quality impact using models?
  3. Are there different models for quantifying the water quality impacts?
  4. I want to know more about the approach and methodology for assessing the ecological impacts.
  5. I think the predictive techniques used in the EIA are too technical for me. Instead, I am interested to know more about the practical mitigation measures for various environmental impacts.

Previous

The assessment criteria and guidelines have been listed down in the EIAO TM Annexes 4 and 12. There are also guidelines issued by EPD about the assessment of air quality impacts using different models, they are:

  • Guidelines on Choice of Models and Model Parameters;
  • Guidelines on Assessing the 'TOTAL' Air Quality Impacts;
  • Guidelines on the Use of Alternative Computer Models in Air Quality Assessment; and
  • Guidelines on Estimating Height Restriction and Position of Fresh Air Intake using Gaussian Plume Models.

These guidelines are available in the EPD website. Please click here.

In a nutshell, the generic approach in an air quality assessment follows the sequence below:

  • Identify air pollution sources
  • Identify air sensitive receivers
  • Quantify air quality impacts by modeling
  • Mitigation measures

Different types of air quality model would be used to assess the impacts from different sources. Please refer to the following table:

Model Application
FDM Construction dust, fill bank, concrete batching plant
CALINE4 Road traffic emission
ISCST3 Stack, portal, odour, ventilation building
PATH Cumulative regional assessment of different air pollution sources, especially for photochemical species such as ozone and nitrogen oxides
Wind Tunnel/CFD Near to medium-field assessment for dispersion of air pollutants from air pollution sources in complex terrain

Typical Information required for air quality assessment (Modelling Input)

As stated in the EIAO-TM Annex 12, the presentation of assessment results should be assisted by a summary table and contour plots of pollution concentration. And the assessment results should be compared with the specified air quality standards where appropriate.

[Map of Hourly TSP Concentration]

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Last Updated : 2004/03/01

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