The vulnerability increases with the number of people affected by the impact of a natural hazard, given by the formula: vij = 10-3 nj2, for n 10 casualties, where vij is the vulnerability of an individual i at location j. (Vrijling et al., 1995)
Katharina Thywissen, Components of Risk: A Comparative Glossary (No. 2/2006), United Nations University Institute of Environment and Human Security (UNU-EHS), ISBN: 3-9810582-0-8 (printed version), ISBN: 3-9810582-1-6 (electronic version), Bonn, Germany 2006. http://www.ehs.unu.edu/file/get/8335, (Dzstr, Rsk, Vul, Haz, etc. - Amer) {796}