AAR 5220 Urban Contingency Practice and Planning
Hazard Flood hazard related to sea level rise and storm tide
Continued: VULNERABILITY, CAPACITY ASSESSMENT (VCA) AND RISK REGISTER Vulnerability Organizational vulnerability
Institutional vulnerability
• no disaster management authority or official disasterresponse systems • inexperienced earlywarning systems for unexpected flooding • lack of expert response team • organizations and departments inexperienced with flooding • lack of planned evacuation routes in sea level rise flooding disaster scenarios • no disaster management authority • low awareness and commitment of local authorities to sea level rise disaster reduction • lack of legislation, plans and instructions for local and national flooding disaster management
The Best, Most Likely and Worst Case Approach
Potential Risk • Late response to disaster causing more damage and casualties • inability to coordinate efficiently, which may delay rescue and other necessary support
• Presence of assistance departments, e.g. fire department, police, etc. • good cooperation with international organizations and EU frame • abundant human resources for disaster response • abundant financial resources for preparedness
• Absent systematic disaster management mechanism leads to lower capacity in disaster coping • may cause more economic loss and casualties
Trondheim based on the research project FloodProBE (2009). These historical flooding events provide good example of possible ranges of impacts in our different scales of scenarios.
The contingency plan adopts the best/most likely/worstcase approach in scenario development. This part investigates into the historical flooding impacts in
Time 910.12.1987
Capacity • Active NGOs, e.g. CARE, Trondheim Red Cross, etc. • community organizations, e.g. Svartlamon housing association, Svartlamon resident association, etc. • Decentralized decisionmaking in Svartlamon
Table 2: HISTORY OF FLOODING IN TRONDHEIM Heavy precipitation, large runoff and flood events
Characteristics of scenarios First 30-40 mm in 20 hours, 2030 mm in the coming 6 hours; and show on the ground equivalent to 20 mm. 95 mm rain and snow melting in two days
Return Interval 10-30 year
Impacts Damages on the roads and houses
40-50 year
30.0105.02.1999
48 mm in 1 day on 04.02.1999
15-20 year
29.07.2007
Rain from midnight to 7-8.00 in the morning with variable intensity in the whole city Intensive rain in 1 hour
100 year
About 100 houses flooded and some roads had to be stopped. One manhole cover was lift at one place due to high pressure in the sewers. The flood attacked the whole city. Flood warning on 30 January 1999. flooding in basements and on roads was registered in large parts of the city, caused million kroner of economic damages. 60 houses were flooded.
>100 year
Over 100 houses were damaged by floods.
3031.03.1997
13.08.2007
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