Welfare Gains From Urbanizing Landscapes In
Great Barrier Reef Catchments? A Spatial
Environmental-economic Modelling Approach
Author(s)
P. C. Roebeling, C. S. Fletcher, D. W. Hilbert & J. Udo
Abstract
The Reef Water Quality Protection Plan aims at ‘halting and reversing the
decline in water quality’ entering the Great Barrier Reef (GBR) by 2015.
Population growth rates in GBR catchments are, however, amongst the largest in
Australia and expected to lead to substantial changes in land use, a subsequent
decline in water quality and degradation of the GBR ecosystem. This paper
explores welfare gains that can be obtained from population growth in a linked
terrestrial and marine ecosystem, using a deterministic optimal control approach
in which we equate terrestrial benefits from population induced residential
development patterns and, subsequent, marine costs from water pollution
associated with these development patterns. Patterns of land use development are
thereby explored using a classic urban economic model with environmental
amenities, while associated water quality impacts are assessed using a water
quality model. For a case study catchment in the Wet Tropics of Australia,
results show that the welfare maximizing population size depends to a large
extent on whether downstream costs from water pollution are taken into account.
Ignoring downstream costs from water pollution leads to welfare maximizing
populations that are multiple times the current catchment population. Accounting
for these downstream costs, however, leads to welfare maximizing populations
that are only a fraction larger than the current catchment population.
Keywords: regional planning, urbanizing landscapes, watershed management,
optimal control, spatially-explicit models.
Keywords
regional planning, urbanizing landscapes, watershed management,
optimal control, spatially-explicit models.
Related Book
Other papers in this volume
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