Criteria Pollutant Dispersion Modeling Analysis
For The Harir Early Production Facility,
Kurdistan Region Of Iraq
Author(s)
D. G. A. Ganjo
Abstract
Anticipated air emissions including NOx, SO2, H2S and CO resulting from
flaring of gas for the Harir Early Production Facility, Northern Iraq (where this
work was carried out) were followed up for impact assessment on existing
ambient air quality via dispersion modeling. Due to the absence of upper layer
meteorological data, stability class and mixing height for the ground layer for
Iraq, prediction of the Ground Level Concentration (GLC) of emissions were
made using the software of Industrial Sources Complex Short Term Model
version 3 (ISCST3). ISCST3 software was used by default internationally for
available ground layer mixing height and stability class. GLCs were calculated
using meteorological data collected from the meteorological station at site during
the monitoring period i.e. from 24 Sep. 2010 to 23 Oct. 2010. Air emissions were
analyzed directly at the field using a portable gas analyzer Drager-Multiwarn,
Germany. Topography of the studied area 10km2 around the project site
(considered for impact assessment) is undulating in nature with contours varying
from 700m to 1550m. Two assumptions were made while using the model; no
dry and wet depletion of pollutants and the EPF location of 1550m. Maximum
24 hourly averages incremental GLCs of emissions during flaring were predicted
for the grid size of 250m2 and 81 grids. The first maximum 50 values of
24 hourly incremental GLCs of emissions were then calculated. Contours for
maximum 24 hourly averages incremental GLCs of air emissions were drawn at
specified concentrations given for each and corresponding isopleth were
depicted. It was evident from the modeling that maximum values of 24 hourly
GLCs for H2S and SO2 severely surpassed Environmental, Health and Safety
Guidelines for Onshore Oil and Gas Development of International Finance
Corporation (IFC). Suitable mitigations and recommendations were made.
Keywords: NOx, SO2, H2S, CO, EPF, ISCST3.
Keywords
NOx, SO2, H2S, CO, EPF, ISCST3.
Related Book
Other papers in this volume
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