Chat with AIExam 5: Principal Hazards in the United States
______________is a widespread problem in the United States that accounts for three-quarters of all presidential disaster declarations.
(38) 
VerifiedFlooding
Firestorms are distinguished from other wildfires because they burn so intensely. True or False?
(35) VerifiedTrue
There are seven types of flooding. Name and define two of them.
(40) VerifiedTwo of the following:
There are seven different types of flooding that are widely recognized.
1. 1. Riverine (main stem)) flooding occurs when surface runoff gradually rises to flood stage (overflows natural banks)) and later falls.
2. 2. Flash flooding occurs when runoff reaches its peak in less than six hours, which usually occurs in hilly areas with steep slopes and sparse vegetation. It also can occur in urbanized areas with rapid runoff from impermeable surfaces such as streets, parking lots, and building roofs.
3. 3. Alluvial fan flooding occurs in deposits of soil and rock found at the foot of steep valley walls in arid Western regions.
4. 4. Ice/debris dam failures result when an accumulation of material temporarily blocks the flow of water and raises its surface above the stream bank before giving way.
1. 5. Surface ponding occurs when water accumulates in areas so flat that runoff cannot carry away the precipitation fast enough.
2. 6. Fluctuating lake levels can occur over short-term, seasonal, or multi-year periods, especially in lakes that have limited outlets or are entirely landlocked.
3. 7. Control structure (dam or levee)) failure, has many characteristics in common with flash flooding.
_______________can immobilize travel, isolate residents of remote areas, deposit enormous amounts of snow on roofs that collapse long-span roofs, and bring down telephone and electric power lines.
(38) Three types of automated devices that detect imminent flooding are radar, rain gages, and stream gages. True or False?
(33) An arbitrary standard of safety that reflects a compromise between the goals of providing long-term safety and developing economically valuable land is:
(40) Tsunamis are common events. For every earthquake a tsunami is generated. True or False?
(37) Natural hazards originate in human-controlled processes but are released into the air and water. True or False?
(25) What are the four characteristics of a toxic chemical release that determines its dispersion pattern and rate of dispersal?
(34) Most biological agents that might be used in deliberate terrorist attacks do not exist as natural hazards. True or False?
(39) Airborne dispersion of toxic industrial chemicals can produce serious inhalation exposures at distances up to:
(32) The impacts of volcanic eruption tend to be strongly directional because ashfall and gases disperse downwind. True or False?
(38) ________________produce four specific threats including high winds, tornadoes, inland, flooding, and storm surge.
(29) An increased number of tornadoes have been reported during recent years, suggesting that some long-term changes in climate are also involved. True or False?
(34) An important temperature for Hazmat chemicals that has an effect on the potential for releases, is the:
(41) 
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