Densication and intensied precipitation patterns due to climate change, has increased
the need for sustainable stormwater management. Sustainable stormwater management
can be implemented as blue-green infrastructure (BGI), which integrates green features
for natural inltration and detention such as green roofs and rain gardens. Through the
use of BGI, added values can be provided as ecosystem services. Authorities and organizations
in Sweden imply the need for valuation of ecosystem services for future integration
in decision-making. This thesis include monetary estimations of ecosystem services within
the use of a cost-benet analysis (CBA), for two alternatives of stormwater management
in Masthuggskajen, Gothenburg. The applied valuation methods are methods commonly
used in economic analysis. The ecosystem services identied and monetarily estimated as
benets within this project were
ood protection, water treatment, air quality regulation,
noise regulation and added recreational value. The result of the CBA indicated that the
most protable alternative was considered to be the implementation of BGI rather than
underground solutions.
The ecosystem services contributing the most to the result was added recreational value,
noise regulation and
ood protection. A sensitivity analysis was concluded by altering
the value of costs and benets. Further analysis of the uncertainty in monetary estimates
is of importance in order to integrate ecosystem services in decision-making.
The diculty in covering the full extent of benets generated by BGI indicates the need of
complementary tools in decision-making. However, this study highlights the importance
of inclusion of ecosystem services in decision-making.