Assessing land consumption impact on ecosystem services provision: an
insight on biophysical and economic dimension of loss of erosion control
in Italy
Abstract
While much research addresses soil erosion rates and erosion control
costs under different land use conditions, few studies address the issue
of the impact due to land consumption. The study presents results from
the national assessment of ecosystem services carried out by ISPRA in
the framework of land consumption monitoring. The purpose is to provide
information on the impact of land consumption and loss of benefits for
the community to support land protection policies. The study is based on
the high-resolution land cover products for Italy produced by ISPRA
using data from the Copernicus-Land Monitoring Services programme.
Accordingly with main research on the topic, RUSLE formula and transport
function is adopted, applying InVEST model. The avoided erosion change
between two reference years is assumed to represent the loss in erosion
control service due to land consumption. The economic dimension is
evaluated by cost of service replacement, with values available in
literature applied to biophysical results. Inputs to the model are the
two different land cover scenario for 2012 and 2018 available from
ISPRA, while other parameters are derived from JRC studies. Results
indicate that the land consumption growth in Italy between 2012 and
2018, evaluated in 31.500 ha is associated to an economic loss that is
over 2,4 billion \euro/year, with erosion control accounting for an
average value over 135 M\euro/year. The study demonstrates the
importance of valuing erosion control to support a sustainable
decision-making upon land use.