stable

Item: return period

URI: http://environment.data.gov.au/def/ba/glossary/return-period

​​​An event has a return period (or recurrence interval) of T years if its magnitude is equalled or exceeded once on average every T years. The reciprocal of the return period is the exceedance probability of the event, that is, the probability that the event is equalled or exceeded in any one year. For example, a flood with a return period of 10 years has a 0.1 or 10% chance of being exceeded in any one year and a flood with a return period of 50 years has a 0.02 or 2% chance of being exceeded in any one year. The actual number of years between floods of any given size varies a lot because of climatic variability.

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is a Concept
license au
submitted bySally Tetreault-Campbell
accepted on 23 Jun 2017 21:20:06.468

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date accepted 23 Jun 2017 21:20:06.468
date submitted 23 Jun 2017 21:19:26.006
definition
entity return period
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description ​​​An event has a return period (or recurrence interval) of T years if its magnitude is equalled or exceeded once on average every T years. The reciprocal of the return period is the exceedance probability of the event, that is, the probability that the event is equalled or exceeded in any one year. For example, a flood with a return period of 10 years has a 0.1 or 10% chance of being exceeded in any one year and a flood with a return period of 50 years has a 0.02 or 2% chance of being exceeded in any one year. The actual number of years between floods of any given size varies a lot because of climatic variability.
item class Concept
label return period
notation return-period
register glossary
status status stable
submitter
account name sally.tetreault-campbell@csiro.au
name Sally Tetreault-Campbell

type register item
version info 2

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Definition

description ​​​An event has a return period (or recurrence interval) of T years if its magnitude is equalled or exceeded once on average every T years. The reciprocal of the return period is the exceedance probability of the event, that is, the probability that the event is equalled or exceeded in any one year. For example, a flood with a return period of 10 years has a 0.1 or 10% chance of being exceeded in any one year and a flood with a return period of 50 years has a 0.02 or 2% chance of being exceeded in any one year. The actual number of years between floods of any given size varies a lot because of climatic variability.
editorial note Approved June 2017
label return period
license au
note This term and definition is used in technical products in the Bioregional Assessment Programme, a collaboration between the Australian Government Department of the Environment and Energy, the Bureau of Meteorology, CSIRO and Geoscience Australia. For more information see http://www.bioregionalassessments.gov.au.
pref label return period
rights The definition for this term is modified from Wikipedia and is licensed under the Creative Commons Attribution-ShareAlike License.
source return period | http://streamflow.engr.oregonstate.edu/terminology/
type Concept

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