Development of a GIS Database for Estimating
Biogenic Hydrocarbon Emissions in North Central Texas
By Irvin Wade Strange, M.S.E.
ABSTRACT
Biogenic hydrocarbons are a significant fraction of the total VOC emission
inventory for the United States and contribute to the formation of tropospheric
ozone. However, the amount of the biogenic hydrocarbons being emitted
into the atmosphere is not precisely known. The current biogenic emission
estimation models and urban airshed models use low-resolution data for
estimating vegetation biomass and VOC emissions.
During this research, the geographical information systems ArcInfo
and Arcview were used to construct a high resolution, spatially accurate
vegetation biomass and biogenic emissions database for the Dallas/ Fort
Worth area. Many sources of data on vegetation cover were evaluated,
and the final mappings incorporated information from three major data
sources.
The methodologies developed in this work are presented along with the
final composite database for 37 counties in North Central Texas. Preliminary
emission plots for the domain were developed and are presented. The
strong dependence of biogenic emissions on the spatial distribution
of vegetation species made the use of a GIS an ideal method for estimating
biogenic emissions.
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