Planning Multifunctional Measures for Efficient Landscape Management: Quantifying and Comparing the Added Value of Integrated and Segregated Management Concepts - Landscape Ecology for Sustainable Environment and Culture - page 260

in all sites where cropland lies on erosion susceptible soils, even when linear
biotope structures already exist. (3) The calculation of the effects and costs for
hedgerows or field margins assumes that the implementation of the measure
requires 10 % of the cropland.
Measures are implemented as listed in Table 13.3 . Measures that can be inte-
grated in cropland use (M1, M8) are allocated on 8,656 ha. Linear hedgerows or
field margins (M9) are implemented on 433 ha. A change of land use (e.g.
cropland within floodplains) into grassland or forest is required on 5,998 ha. The
costs for implementing all measures total 84.13 Mio. € over the 10 year period.
With a limited budget, e.g. 10 Mio. € (1 Mio. € per year), erosion preventions
would only be guaranteed on 11.9 % of the susceptible areas.
13.4.1.2 Sectoral Scenario for Conservation of Water Quality
In order to achieve the mandatory groundwater quality objective in the case study,
some areas require a N-reduction for agricultural land (UAA) of [10-20 kg/ha*a
others as much as [20-40 kg/ha per year (Kreins et al. 2009 ). To reach the good
status of surface waters an additional reduction of [5-10 kg/ha *a (UAA) is
required in particular subunits of the area, in other subunits even [10-15 kg/ha*a
(Kreins et al. 2009 ). This constitutes a total required N-reduction of about 1.500 t
N per year.
To achieve these objectives, it is necessary to implement measures on each
agricultural site (in total 52,667 ha). In fact, two different N-reduction measures
are necessary on approximately 4.000 ha (combination of two measures on one
site). The implementation of the water quality protection strategy costs about
27.71 Mio. €/10 years. With a limited budget of 10 Mio. €, more than one third
(36.1 %) of the targets can be met.
13.4.1.3 Sectoral Scenario for Climate Change Mitigation
The implementation of climate change mitigation measures within the case study
area can reduce CO 2 -emissions on 10,604,116 t. This theoretical potential for the
reduction of CO 2 -emissions is considered the environmental quality objective for
this landscape function.
Appropriate measures for the reduction of CO 2 -emissions include M11 and
M10. Reaching the CO 2 emission reduction target for the case study area requires
implementing measures on 32,869 ha (5,094 ha M11, 27,775 ha M10). These
measures cost 249.82 Mio. €. With a limited budget of 10 Mio. € (about 4 % of the
total amount of spending required for reaching the environmental quality objec-
tive), 5.9 % of the targeted reduction of CO 2 -emissions can be attained, if the most
effective measure M11 is implemented.