Title: Field Testing and
Evaluation of Dust Deposition and Removal Algorithm
Objective: To determine the fate of dust emitted into the air
with a primary emphasis on field testing to assess the accuracy of applying an
algorithm for modeling dispersion which accounts for the mechanisms which tend
to remove the dust from the air and the rate at which dust is removed from the
air. Study results will assist the
states in reconciling observed particulate concentrations with existing
emissions inventories.
Background: Many
studies have measured the quantity of dust emitted from a variety of sources
such as unpaved road dust or agricultural soil preparation.
Emission rates measured in these studies are at variance with measured
atmospheric concentrations of geologic PM2.5/PM10.
This field testing will potentially lead to a better technique for
characterizing how geologic dust affects regional scale air quality.
The Western Regional Air Partnership (WRAP) Research and Development (R
and D) Forum will host a workshop to review and critique current research on
dust removal mechanisms and propose an algorithm(s) which will be field tested
to assess whether or not such an approach can account for the disparity between
inventory derived and monitored dust concentrations.
Description
of Work: This study will consist of field testing to
determine the fate of dust emitted to the air.
The primary emphasis of this research will be field testing of the
preferred algorithm(s) recommended by the WRAP Research and Development Forum
which best characterizes the dispersions mechanisms of dust emitted into the
atmosphere. These algorithms will
be compared to the ISC ST3 dispersion algorithm with and without deposition. The study design of the field testing will be refined in
consultation the WRAP Research andDevelopment Forum and the Best Available
Control Measure (BACM) Working Group.
Area sources
to be considered for field testing will include construction dust, paved and
unpaved roads, agricultural tilling/harvesting/land preparation, and wind
erosion affecting agricultural land, disturbed land, and non-anthropogenic
sources. Findings will be based on
field testing. Findings
should be presented with a view toward assisting the states reconcile observed
atmospheric particulate concentrations with existing emissions inventories.
Deliverables:
·
A report
which includes results of field testing designed to test the applicability of
applying an algorithm to account for the disparity between inventory derived and
monitored ambient dust concentrations.
The report will include the methodologies employed in field work, results
of field measurements, analysis of data, and findings.
Required
Qualifications:
Demonstrated understanding of fugitive dust entrainment mechanisms, atmospheric
modeling, and emission inventory calculations.
Capability to conduct required field measurements.
Estimated
Cost: $100,000.