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3982026
Causes of River Floods
Descripción
Rivers, Floods and Management- Causes of River Floods
Sin etiquetas
causes
flooding
river
river floods
geography
overland flow
agriculture
evapotranspiration
deforestation
snowmelt
flood management
rock type
long profile
drainage density
prolonged rainfall
geography
river, floods and management
as - level
Mapa Mental por
littlestephie
, actualizado hace más de 1 año
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Creado por
littlestephie
hace alrededor de 9 años
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Resumen del Recurso
Causes of River Floods
Physical Factors
Rock Type
Impermeable rock encourages rapid overland flow
Steep Slopes
Mountain Environments encourage rapid transfer of water
Long Profile
Steep upper course and flat lower course means a build up of water in lowland areas
Drainage Density
High drainage density means water reaches the river quickly
Snowmelt
When snow/ice melts it means lots of water running over ice
Intense and Prolonged Rainfall
Summer/tropical storms and monsoons means flooding
Human Factors
Building Construction
Building on floodplains creates impermeable surfaces and drains filling river channel rapidly
Deforestation
Little evapotranspiration happening
Agriculture
Arable farming means soil is left bare to the weather, so ploughing creates grooves meaning flooding
Ineffective Flood Management and Warning Systems
Lack of flood defence/badly maintained culverts/bridges means flooding
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