the wide valley floor on either side of a river- ocassionally get flooded.
3 of 20
Water falls are found in the ...
Upper course of a river
4 of 20
Flood plains + Levees are found in the ...
Lower course of a river
5 of 20
Levees are...
Riased bits along the edges of a river channel ( Natural embankments)
6 of 20
River discharge is the ....
volume of water flowing in a river
7 of 20
river discharge is measured in ...
cubic meters per second
8 of 20
hydrographs show how....
the discharge at a certain point in a river changes over time.
9 of 20
Storm hydrographs show the....
changes in river discharge around the time of a storm
10 of 20
Lots of rainfall +short heavy period of rainfall affects discharge as....
there's more runoff, so lag time is decreased, so discharge is increased
11 of 20
Hot+Dry or Cold + Freezing conditions affects discharge as...
it results in hard ground , increasing run off , so lag time is decreased , so discharge in increased,
12 of 20
Previous bad weather conditions ( lots of rain) affects discharge as...
soil becomes saturated, less rainwater will be able to infiltrate into the soil, increasing run off- increasing discharge
13 of 20
Land use( Urban areas) affects discharge as....
they have drainage systems and have impermeable materials like concrete, so run off is increased, so lag time is decreased, so discharge is increased
14 of 20
rock type ( Impermeable) affects discharge as ....
water cant infiltrate through impermeable types, so more runoff, so lage time is decreased, so discharge is increased.
15 of 20
rock type ( permeable ) affects discharge as..
Water can infiltrate through pore space in permeable types and flow along cracks in previous rocks, so not much run off, lag time increased and discharge decreased
16 of 20
Relief( how the height of land changes) affects dischage as...
lots of run off on steep slopes, lag time decreased so discharge increased.
17 of 20
Flodding happens when...
level of a river get toohigh, so it spills over its banks.
18 of 20
4 physical factors that cause flooding are..
Snowmelt, prolonged rainfall, heavy rainfall, Relief
Comments
No comments have yet been made