Lesson 8 - Factors Affecting Flooding Flashcards
1
Q
How does vegetation affect flooding?
A
Influences interception
Less veg, more SRO, shorter lag time
2
Q
How does a slope affect flooding?
A
Steeper gradient, less infiltration
Rapid SRO
Short lag times
3
Q
How does rock type affect flooding?
A
Impermeable + non-porous
No percolation
SRO, short lag time
4
Q
How does soil depth affect flooding?
A
Deep soils, more infiltration capacity
More water retention
Less saturation
5
Q
How does drainage density affect flooding?
A
Higher density, water reaches main channel faster
Flood risk more prominent
6
Q
How is drainage density calculated?
A
Total Length of Streams/Size of Drainage Basin
