Risk assessment requires accurate recording of previous disasters and in particular the associated losses in terms of human casualties, property and environment damage as well as economic loss.

Disaster loss accounting is the primary motivation for recording disaster loss with the aim to document the trends and aggregate statistics informing local, national and international disaster risk reduction programmes. Disaster loss accounting is a pre-requisite of disaster forensics (which identifies the causes of the disaster through measuring relative contribution of exposure, vulnerability, coping capacity, mitigation and response to the disaster, with the aim to improve disaster management from lessons learnt) and risk modelling

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