Flood Prediction Flashcards
1
Q
How do you calculate the recurrence interval (years)?
A
No. of years on record + 1 / ranking of flood being considered (in terms of flood size in m3s-1)
2
Q
What is the flood return period?
A
When the recurrence interval is plotted against discharge as a scatter graph, you can use the line of best fit to predict when the next flood of a particular altitude may occur.
3
Q
What floods should densely populated areas be protected against?
A
1 in 100 year flood events
4
Q
What data do hydrologists use to forecast floods?
A
River discharge records in relation to precipitation, and flood recurrence interval graphs.
