Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: An inverse Gaussian plume approach for estimating atmospheric pollutant
  emissions from multiple point sources   A method is developed for estimating the emission rates of contaminants into
the atmosphere from multiple point sources using measurements of particulate
material deposited at ground level. The approach is based on a Gaussian plume
type solution for the advection-diffusion equation with ground-level deposition
and given emission sources. This solution to the forward problem is
incorporated into an inverse algorithm for estimating the emission rates by
means of a linear least squares approach. The results are validated using
measured deposition and meteorological data from a large lead-zinc smelting
operation in Trail, British Columbia. The algorithm is demonstrated to be
robust and capable of generating reasonably accurate estimates of total
contaminant emissions over the relatively short distances of interest in this
study.

18
The categories of this paper are: econ
33
The categories of this paper are: plasm-ph
10
The categories of this paper are: q-bio
13
The categories of this paper are: quant-ph
5
The categories of this paper are: gr-qc
12
The categories of this paper are: nucl-th
14
The categories of this paper are: math-ph
17
The categories of this paper are: q-fin
9
The categories of this paper are: nlin
24
The categories of this paper are: dg-ga
26
The categories of this paper are: bayes-an
36
The categories of this paper are: cmp-lg
2
The categories of this paper are: math
16
The categories of this paper are: stat
6
The categories of this paper are: astro-ph
20
The categories of this paper are: acc-phys