10.4122/1.1000001039
Hauger, M. B.
M. B.
Hauger
Mouchel, J.-M.
J.-M.
Mouchel
Mikkelsen, P.S.
P.S.
Mikkelsen
Indicators of hazard, vulnerability and risk in urban drainage
DTU Library, Technical University of Denmark (DTU)
2005
Conference presentation
Hazard
indicator
risk
stormwater
vulnerability
Technical University Of Denmark, Institute Of Environment
Institute Of Environment
Technical University Of Denmark
ENPC
2005
en
10.4122/1.1000001040
text/xml
An alternative definition of risk is proposed as risk being a function of the hazard, which is related to the risk source and the vulnerability, which is related to the risk object. The same hazard will not cause the same effect on all risk objects. Therefore vulnerability is introduced as a system dependant property to be the link between the hazard and the effect so that the combination of the occurrence of a hazard and the vulnerability of an object results in the effect. In risk communication indicators are helpful since they help to simplify the message that has to be communicated. Three examples (pluvial flooding of sewers, dissolved oxygen depletion in streams and discharge of chemicals to receiving waters) show that dependant on the risk problem possibilities for risk reduction lies either at the risk source or at the risk object. Therefore it is important to have indicators that can be used when the possibilities of risk reduction are analyzed.