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410002
River Discharge
Descrição
Mind map Page 111 Question 3
Mapa Mental por
Jasmine Macdonald
, atualizado more than 1 year ago
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Criado por
Jasmine Macdonald
mais de 10 anos atrás
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Resumo de Recurso
River Discharge
Definition
The volume of water passing a given point in river at any moment in time
Influences
weather
Amount of rain fall
High river levels
Low river levels
Hydrological Cycle
High amounts of rain
Rain saturates the soil and underlying rock
Drizzle
There is time for water to infiltrate the soil and underlying rock
Freeing up space for more rain
rainfall, temp, conditions
Physical Factors
Human Land Use
Tempreature
Loss of water from the drainage basin and level of discharge
Higher
loss of water via evaporation and transpiration
Water levels go down
Previous weather conditions
Dry
longer for water to reach river
amount will be less than if there had been a number of wet days
Rock Types
How much water infiltrates and stays on the surface
Land Use
Effect of people
Deforestation
Trees removed
water reaches surface faster
Trees do not extract water from the gorund
Urbanisation
Expanding towns create an iimpermeable surface
Worse
building drains to take water away from buildings quickly
Rainfall in Sheffield
Between 13 June until flooding on 26 June
14 June rainfall was 88.2
Shows it rained most of the day
Number is very high and its building up from the first day with 30.3mm of rainfall
Flood may accur
Some days were high rain fall however others were not.
Flood could come after days of rain weather its high rain or low.
The ground can also depend on the flood
Relief affects rate in which water runs off the land surface and into the rivers
Slopes
Fast run off
Water spills faster due to gravity
Gravity
Gentle
Time for infiltration
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