In May 2024, the CRISAFE project made significant strides in the digitalization of critical spatial data and mapping within the pilot area of Zagreb, Croatia. As part of Work Package 2 (WP2), under Tasks 2.1 and 2.2, the project focused on collecting and digitising spatial data and maps that were previously unavailable in digital form. These activities aim to improve data visualization and sharing, forming the foundation for further risk and vulnerability assessments of critical infrastructure, particularly in response to flood and earthquake hazards.
In the city of Zagreb, critical infrastructure is being mapped, and an inventory is being established to support future risk assessments. This inventory includes two levels of information:
- Key attributes such as location, age, and structural details, and
- The infrastructure’s response to flood and earthquake hazards, highlighting potential failure modes.
Following recent hazard events, including a 5.5 magnitude earthquake in 2020 and severe floods in August 2023, the City of Zagreb has increased its focus on using and combining various data sources to monitor potential hazards such as soil liquefaction, landslide activation, and infrastructure damage.
The data collected comes from diverse sources, including literature, infrastructure owners, and targeted on-site investigations. A notable gap in existing inventories has been the lack of georeferenced exposure data, which InfraPlan and the Faculty of Civil Engineering at the University of Zagreb (FCEZG) are now addressing by improving the visualisation and digitalisation of maps for integration into a GIS database.
Some data, such as landslide surfaces and tectonic fault zones, were extracted from public databases, while others – like liquefaction probability and seismic hazard maps – were digitized from non-spatial sources. This process involved creating image files of the desired maps, georeferencing them, and digitising relevant polygons using GIS tools. The newly digitised data will be crucial for subsequent analyses of critical infrastructure in the case study areas, particularly for reference retention structures in Zagreb, as the CRISAFE project progresses.
Want to know more? Here are some useful resources:
- Veinović, Ž., Domitrović, D., Lovrić, T. (2007). Historical occurence of liquefaction in Zagreb area and estimation of reoccurence in case of another strong earthquake, Rudarsko-geološko-naftni zbornik, Vol. 19 No. 1.; https://hrcak.srce.hr/clanak/30202
- https://geoportal.zagreb.hr/Karta
- Sović, I., Markušić, S. et al. (2023). Seizmička istraživanja u sklopu projekta „Procjena potresnog rizika Grada Zagreba“ (faza 1)
- Sović, I., Markušić, S. et al. (2023). Seizmička istraživanja u sklopu projekta „Procjena potresnog rizika Grada Zagreba“ (faza 2) https://potresnirizik.zagreb.hr/elaborati/11
(Veinović, Ž., Domitrović, D., Lovrić, T. (2007). Historical occurence of liquefaction in Zagreb area and estimation of reoccurence in case of another strong earthquake, Rudarsko-geološko-naftni zbornik, Vol. 19 No. 1.; https://hrcak.srce.hr/clanak/30202 )
(Sović, I., Markušić, S. et al. (2023): Seismic Surveys as Part of the Project ‘Assessment of Seismic Risk for the City of Zagreb. https://potresnirizik.zagreb.hr/elaborati/11)
(Sović, I., Markušić, S. et al. (2023): Seismic Surveys as Part of the Project ‘Assessment of Seismic Risk for the City of Zagreb’ (Phase 2) https://potresnirizik.zagreb.hr/elaborati/11)
