IDF curves Flashcards
1
Q
What is a hyetograph?
A
plots rainfall intensity vs time
2
Q
What’s the maximum rainfall intensity of a hyetograph?
A
is biggest change over time (steep)
3
Q
If a event has a 100 yr return period what does that mean?
A
it means that there’s 1/100 chance that you get a storm equal or higher to that
4
Q
What does an IDF graph do?
A
An IDF graph (or IDF curve) tells you how likely it is to have a rainfall event with a certain average intensity over a certain period of time
5
Q
What caused the ab floods?
A
moist air stalled on top of mountains, ppt on surface was saturated so condensation ran off, and snowmelt contributed to runoff, lead to flooding
