Natural Disaster

DIRECTED BY : ANSHITA KHANDELWAL SAKSHI BINDAL KASHISH MANNAT LAKHINA ARCHITA SHARMA RITIKA GUPTA

A natural disaster is a major effect of a natural hazard that affects the environment, and leads to financial, environmental and human losses.

Floods Tsunami Tornadoes Hurricanes Cyclones Volcanic Eruptions

Heatwaves Droughts Wild Fires Landslides Blizzards Ice Storms Avalanches Earthquakes

Natural Disasters that cause the most deaths

Earthquake Manifest themselves by

vibration, shaking and displacement of the ground

Caused mostly by slippage within geological faults

Rarely kill people or wildlife

Secondary events they trigger will, building collapse, tsunamis and volcanoes

Could be avoided by better construction, safety systems, early warning and evacuation planning

Floods Regular natural disaster in Malaysia

during monsoon season

Result from the water within a body of water, such as river or lake, which overflows or breaks levees, with the result that the water escapes its usual boundaries

Caused by inadequate drainage

Could be prevent by reducing the disposal of garbage

Volcanic Eruptions May cause the explosion of volcano, the fall of rock, and lava may be produced

Volcanic ash :- May cause roofs to collapse under its weight Even small quantities will harm humans if

inhaled Cause abrasion damage to moving parts

such as engines Pyroclastic flows (a cloud of hot volcanic

ash) is the main killer of humans

Impact of Natural

DisastersIndividual Impact Can be felt physically, mentally and

emotionally

Destruction of property, loss of financial resources and personal injury or illness

Develop severe post-traumatic stress disorders or withdraw into states of depression

Lead to significant population migrations

Community Impact Loss of economic resources that recovery

becomes difficult, if not almost impossible

Opportunity in the aftermath of a disaster to rebuild better and stronger communities than before

Population, demographic and cultural shifts are also result of the impact

Economic Impact

Reduced tax revenue

Loss of infrastructure

Expense of reclamation efforts

Loss of normal revenue

Huge sums of federal assistance were necessary to held jump start recovery efforts

Environment Our ecosystems can be dramatically

damaged Global climate changes

Sea level increases that will completely swamp some island nations

Edible fish supply decreases Loss of coral reefs

SOLUTIONNot all natural disasters can be prevented. Each natural disaster has its own factors and complications. Understanding the basic principles of ecology can provide keys to lessening their effects. Nature evolved with natural disasters and disturbance. The best prevention is looking at strategies found in nature.

AUDIENCE QUESTION1. A place where an earthquake originates is called the __________.

a) Focusb) Tsunami

c) Fault Lined) Epicenter 

2.  As the magnitude of natural disasters increases their frequency of occurrence _________.

a) increasesb) decreases

c) remains the samed) varies over time

        

3. Which natural hazard has resulted in the greatest monetary losses in a single event for the period of time listed?        a) earthquakeb) hurricanec) fired) flood

4. The largest wave during a tsunami event is __________________.        a) the firstb) the thirdc) the fifthd) unpredictable, it could be any of them

5. The destructive powers of tsunami result mainly from their ___________________.

a) incredible heightb) unpredictablilityc) cold waterd) momentum and long wavelength

        6. In the open ocean, tsunami can travel ________ miles per hour with periods up to _________ minutes.

a) 50; 20b) 50; 60c) 485; 20d) 485; 60

        7. Which event produces the biggest tsunami?

a) Earthquakeb) Underwater landslidesc) Hurricanesd) Impacts of asteroids and comets

ANSWERS

1. The correct answer is - a) Focus.2.

The correct answer is - b) decreases.3. The correct answer is - b) hurricane.4.

The correct answer is - d) unpredictable, it could be any of them        5.

The correct answer is - d) momentum and long wavelength.

6. The correct answer is - d) 485; 607. The correct answer is - d)  Impacts of asteroids

and comets