Hydrographs

Question 1

what are th two types of hydrographs ?

Answer 1

flashy and slow response

Question 2

what do flashy hydrograhs have compared to slow response hydrographs?

Answer 2

they have a much shorter lag time

Question 3

what is the lag time?

Answer 3

the time between peak discharge and peak rainfall

Question 4

what factors affect the hydrographs?

Answer 4

number of trees
gradient of valley slopes
whether rock is impermeable or not
urbanisation
already saturated soil

Question 5

what are some factors that increase the risk of flooding

Answer 5

precipitation
geology
releif
land use - agriculture, urban