1
Q
what are three plotting position methods
A
Weibul
Blom
Gringorton
2
Q
what are the three plotting positions used for (each type)
A
weibull-uniuform
Blom-normal
Gringorton -Gumbell
3
Q
two types of flood series
A
partial duration (peaks over threshold), extreme value
4
Q
what is peaks over threshold series
A
floods whose magnitude is greater than a certsain base value
5
Q
what is extreme value series-
A
greaterstr value from each year
6
Q
so summarise the difference
A
peak over threshold take sin into accoutn all values over a peak threshold regardless of time but extreme value takes only one from each year
7
Q
which ones better
A
annual exceedence (POT) better for short return periods <10 years
