definition of impact.
It has not been routine to report upon the environmental impacts of natural hazards. Although reports on the link between natural hazards and environmental impact are occasionally released, no systematic reporting structure exists. There is a particular lack of information on the potential interaction between natural hazards and human activities as a cause of environmental impact. A significant issue which monitoring should take into account is the transfer of impact geographically and often transnationally (eg: drought, irrigation and water resource depletion elsewhere; deforestation, soil erosion, floods; coastal erosion, coastal defences, loss of sediment supply elsewhere, erosion elsewhere).