Flood单词知识总结思维导图
Flood单词知识总结
树图思维导图提供 Flood单词知识总结 在线思维导图免费制作，点击“编辑”按钮，可对 Flood单词知识总结 进行在线思维导图编辑，本思维导图属于思维导图模板主题，文件编号是：cdb85bbc53bfaa2b4d37ada08db46ff5
思维导图大纲
Flood思维导图模板大纲
introduce
mean
an overflow of water
examples
water submerging land
a deluge
Floods are part of the natural cycle of things
positive effects
distribute large amounts of water
suspended river sediment over vast areas
negative effects
destroy drainage system
cause raw sewage to spill out into bodies of water
Cause of flood
Deep snow melt
look for heavy rain and rapid heating,cmobined with rapidly melting snow
Rain or frozzen or melt soil
heavy rain or rapid snow melt combined with saturated soil causes flooding most frequently
Full reservoirs
reservoir is full and thus causes flooding
Ice dams
ice dams cause water to rise rapidly behind them.
dam suddenly breaks,water also flood downstream
Widespread heavy rain
is the most important and influential factor
long period of heavy rain can cause flooding
High river and stream levels
stream or rivers that are already at bankfull can be a precursor to major flooding
Monsoon rainfalls
can cause disastrous flooding
Hurricanes
Melting snow
flsah flood from quicklymelting mountain snow
undersea earthquakes
Types
Coastal flooding
mean
hurricanes and tropical storms can produce heavy rains ordrive ocean water onto land
effects
beaches and coastal house can be swept away by the water
other source
volcanoes in the ocean
earthquakes in the ocean
River flooding
cause
some floods occur seasonally when winter snows melt and combine with spring rains
Urban flooding
cause
roads and parking lots have less ability to absorb rainfall
Flash floods and arroyos
Variability of flooding
Frequency of flooding
Flood plains
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