Dear Suhil
There are, as I'm sure you're aware, many different definitions of the terms "vulnerability", "risk" and to a lesser degree "hazard". In the flood risk management community some degree of consensus was reached on these various terms and other related ones under a European Commission funded research project called FloodSite that had around 40 partners in many European Union countries. A document entitled the "Langauge of risk" was produced. This is availab;le to download from here: http://www.floodsite.net/html/partner_area/project_docs/T32_04_01_FLOODsite_Language_of_Risk_D32_2_v5_2_P1.pdf The glossary at the back of this document may help you to formulate definitions for teh above.
Best regards
Darren
Exactly as Darren says, so much is contextual and depends on definitions. Here are two papers articulating thoughts on vulnerability as a process rather than as a calculation:
1. https://link.springer.com/article/10.1007/s13753-015-0038-5
2. https://link.springer.com/article/10.1007/s11069-016-2294-0
Here is one paper examining the differences and interactions of hazard and vulnerability:
3. https://link.springer.com/article/10.1007/s13753-015-0046-5
And a piece of defining risk:
4. http://www.ilankelman.org/abstracts/kelman2003frn.pdf
Dear Sushill,
Hazard = the source of negative incident
Risk = the degree of riskiness (Possibility * Impact)
Vulnerability = the degree of exposure
That's why some authors recommends:
Risk = Possibility * Vulnerability * Impact
Speaking for floods:
Hazard, is the rain
Risk, is the possibility of heavy rain and the impact in case of a flood
Vulnerability, is higher when a city or a mine is near to a river or the drainage system is underdeveloped etc.
In this case a city near a river (all other factors being the same) is more vulnerable to a flood so the Risk is higher.
HRVA and HVRA is simply the semantics but nothing totally different from each other. Whether you start with hazard, risk and vulnerability or you start with hazard, vulnerability and risk, you will finally get to your destiny. all the critical elements with be assessed and ultimately addressed.
I do not think that it is just Semantics and understand meaning of these terminology. In NatCat modeling of Risk Assessment (HVRA) , you need to convolute hazard, exposure and vulnerability. However, if Risk comes before Vulnerability, then assessment then assessment can not be same.
Sushil, please find attached one of the first papers distinguishing the components of risk in the field of landslides. Morover I sendyou a link to the deliverables (see 1.6) of an EU Project that studied in detail the methodologies for risk assessment.
http://unesdoc.unesco.org/images/0006/000630/063038EB.pdf
http://www.kulturisk.eu/results/wp1
Finally, I tried to discuss the topic of physical vulnerability in these papers.
Article Vulnerability to Flash Floods: A Simplified Structural Model...
Article Using web-based observations to identify thresholds of a per...
Article Using web-based observations to identify thresholds of a per...
Luca
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