Natural Events and the Environment Flashcards
What are human factors that effect the environment
urbanization deforestation waste disposal resource extraction man-made structures greenhouse gases
Urbanization has resulted in increases in
population living in urban areas
land used for urbanization
development in high risk areas
What are the effects of deforestation
increased soil erosion
increased flooding
Effect of waste disposals
contamination of water sources
changes to Earth’s surface
Effects of resource extraction
can be damaging
disturbs balance of ecosystems
Effects of highways on hill slopes
increase in slope failure or landslides
Effects of seawalls and groins
alter the sand deposition
can increase beach erosion
Greenhouse gases may contribute to the increase in…..
natural disasters
General impacts of natural events
death and injury property damage and loss weakening of social infrastructure economic environmental changes
What is Lahar
combination of water and rubble and flows from the slope of a volcano
What do Lahars trigger
excess rainwater
melted snow or ice
landslides
earthquakes
What is a pyroclastic flow
dense mix of dry hot rock fragments and hot gas erupted from volcano vents at high speeds
pyroclastic flows results
destroys on impact
buries areas
forms lahars
burns surrounding areas
What is a lava flow
slow moving molten rock
Lava flows can result in
lahar or pyroclastic flows
destroys everything in path
Effects of gases
fumaroles
acid rain and air pollution
increase ozone depletion
temperature changes
What is a tephra
fragments of rock or lava or varying sizes ejected into the air by a volcanic explosion
Impact of huricanes
coastal erosion storm surges flooding strong winds landslides increased susceptibility to subsequent storms
Impact of tornadoes
uproots buildings
destroy buildings
death and injury
move and destroy cars, trucks, and other objects
Liquefaction can be a result of
earthquakes
Liquefication
disruption of loose sediments by seismic waves resulting in formation of a slurry
Impacts of wildfires
property damage change to landscapes death and injury erosion water pollution air pollution trigger landslides
Impact of floods
low rate of death and injury
high property damage
Impact of landslides
damage and change to land
injury and death
damage to structures
triggered by storms, earthquakes, volcanoes, fores, and human activity
