Hazard in the environment - What are the environmental hazards?

7 important questions on Hazard in the environment - What are the environmental hazards?

What is a description of a quasi -natural hazard?

Happening of a river flood for example, can be triggered by natural causes but simultaneously be increased by deforestation or decreased by a dam. Therefore, these hazards are influenced by nature and humans.

What is a description of natural-technological hazards?

Extreme natural processes lead to destruction of infrastructure or buildings or something. At least it is all human made. Even though this is triggered by nature, the main threat comes from pollution in atmosphere or water due to accidental release of dangerous substances.

What is a description of a disaster?

Big difference with hazard: a disaster originates from human failures including industrial conditions, dangerous procedures or infrastructure that causes death, property loss, damge to society and environment.
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What are the steps that lead to the major na-tech disaster in Japan in 2011?

Step 1: Earthquake, which resulted from the Pacific plate moving underneath the Indo-Australian-Fiji plate.
Step 2: the earthquake triggers a tsunami, which even clashes over high sea walls.
Step 3: The tsunami flooded the coastal nuclear power station Fukushima I.  14 m high waves did so, which caused explosions and 80 000 people were evacuated.
Emergency phase: cool reactors with helicopters and sea water, but this needs to be done for years on end which has not been the case really.

When does an event become a hazard?

When an element fluctuates over a normal threshold, for example; very high rainfall creates a flood and very low rainfall results in drought.

What is the definition of technological hazards?

Transport accidents - air accidents, train crashes, ship wrecks
Industrial failures - explosions and fires, release of toxic or radioactive materials
Unsafe public buildings and facilities - structural collapse, fire
Hazardous materials - storage, transport, misuse of materials

What is the definition of a socio-natural hazard?

This is the case when there is an increase in either the frequency or severity of hazardous event that can contribute to decomposed land, or resources that have been used to often (they have therefore worn out a bit).

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