Multi-criteria analysis of alternative tunnel corridors in Göteborg - A geosystem services perspective
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Författare
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Examensarbete för masterexamen
Master's Thesis
Master's Thesis
Modellbyggare
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Sammanfattning
The comprehensive plan of Gothenburg’s municipality, Sweden suggests to extend
the railway network in the southern part of the city. There exist three potential
railway routes, some of which pass through underground tunnels. This report
specifically investigates all three tunnel routes, focusing on the subsurface resources.
The evaluation is centered on geo-system services along the tunnel corridors, a novel
concept that elucidates the resources and services available for human utilization beneath
the surface. geo-system services can be categorized into four distinct groups:
supporting, cultural, regulating, and provisioning. Initially, an assessment is conducted
to evaluate the current quality of these geo-system services and their potential
for exploitation.
Additionally, any potential conflicts that could have adverse effects on these attributes
are examined as part of this evaluation, with Geographic Information Systems
(GIS) serving as a key tool in the assessment process. The process utilized
for this study is multi-criteria analysis. All three tunnel routes are poised to have
a great impact on different geo-system services. The services at high risk are geoenergy
wells, groundwater resources, and the mobilizing of pollutants.
However, in some parts, the excavation could synergistically extract geo-material
through tunnel corridors. But a comparative study is needed to facilitate comprehensive
decision-making. Such a study would compare impacts of potential routes
on geo-system services. Careful consideration is required to balance extraction benefits
against impacts to other underground services and systems. The comparative
study aims to support route selection by assessing how alignments may positively
or negatively affect the geo-system. This ensures the most suitable choice weighing
all relevant factors.
Beskrivning
Ämne/nyckelord
Geo-system services, Subsurface, GIS, Multi-criteria analysis