For the satellite return period, see Satellite revisit period.
A return period, also known as a recurrence interval or repeat interval, is an average time or an estimated average time between events such as earthquakes, floods,[1] landslides,[2] or river discharge flows to occur.
It is a statistical measurement typically based on historic data over an extended period, and is used usually for risk analysis. Examples include deciding whether a project should be allowed to go forward in a zone of a certain risk or designing structures to withstand events with a certain return period. The following analysis assumes that the probability of the event occurring does not vary over time and is independent of past events.
^ASCE, Task Committee on Hydrology Handbook of Management Group D of (1996). Hydrology Handbook | Books. doi:10.1061/9780784401385. ISBN 978-0-7844-0138-5.
^Peres, D. J.; Cancelliere, A. (2016-10-01). "Estimating return period of landslide triggering by Monte Carlo simulation". Journal of Hydrology. Flash floods, hydro-geomorphic response and risk management. 541: 256–271. Bibcode:2016JHyd..541..256P. doi:10.1016/j.jhydrol.2016.03.036.
A returnperiod, also known as a recurrence interval or repeat interval, is an average time or an estimated average time between events such as earthquakes...
In finance, holding periodreturn (HPR) is the return on an asset or portfolio over the whole period during which it was held. It is one of the simplest...
The Edo period (江戸時代, Edo jidai), also known as the Tokugawa period (徳川時代, Tokugawa jidai), is the period between 1603 and 1868 in the history of Japan...
each return into a return over a period of time of a standard length. The result of the conversion is called the rate of return. Typically, the period of...
strict notion of returnperiod actually has a meaning only when it concerns a time-dependent phenomenon, like point rainfall. The returnperiod then corresponds...
The Sengoku period, also known as Sengoku Jidai (Japanese: 戦国時代, Hepburn: Sengoku Jidai, lit. 'Warring States period') is the period in Japanese history...
The Heian period (平安時代, Heian jidai) is the last division of classical Japanese history, running from 794 to 1185. It followed the Nara period, beginning...
postnatal) period begins after childbirth and is typically considered to last for six weeks. There are three distinct phases of the postnatal period; the acute...
of the calculation is expressed as a percentage return over the holding period. This method for return calculation is used in modern portfolio management...
In classical antiquity, the Hellenistic period covers the time in Mediterranean history after Classical Greece, between the death of Alexander the Great...
A return merchandise authorization (RMA), return authorization (RA) or return goods authorization (RGA) is a part of the process of returning a product...
of authority became the rule despite the reforms of the Nara period. Eventually, to return control to imperial hands, the capital was moved in 784 to Nagaoka-kyō...
The Muromachi period or Muromachi era (室町時代, Muromachi jidai), also known as the Ashikaga period or Ashikaga era (足利時代, Ashikaga jidai), is a division...
The Kamakura period (鎌倉時代, Kamakura jidai, 1185–1333) is a period of Japanese history that marks the governance by the Kamakura shogunate, officially established...
period of orbital relations with other objects, normally Earth, and their orbits around the Sun. It applies to the elapsed time where planets return to...
Peninsula of Normandy, all of which weathered gusts typically with a returnperiod of 1 in 200 years. Forests, parks, roads, and railways were strewn with...
the Tudor period occurred between 1485 and 1603, including the Elizabethan era during the reign of Elizabeth I (1558–1603). The Tudor period coincides...
In the history of the 20th century, the interwar period (or interbellum) lasted from 11 November 1918 to 1 September 1939 (20 years, 9 months, 21 days)...
Return on investment (ROI) or return on costs (ROC) is the ratio between net income (over a period) and investment (costs resulting from an investment...
start of year 1 which returned $500 at the end of year 1 and year 2 respectively would have a two-year payback period. Payback period is usually expressed...
Return of the Jedi (also known as Star Wars: Episode VI – Return of the Jedi) is a 1983 American epic space opera film that is the sequel to Star Wars...
The Confederation period was the era of the United States' history in the 1780s after the American Revolution and prior to the ratification of the United...
which would help to explain the return to gardens and the more public style of the Ottoman court during this period. The Grand Vizier was himself very...
The Asuka period (飛鳥時代, Asuka jidai) was a period in the history of Japan lasting from 538 to 710, although its beginning could be said to overlap with...
The early modern period is a historical period that is part of the modern period based primarily on the history of Europe and the broader concept of modernity...
The Warring States period was an era in ancient Chinese history characterized by warfare, bureaucratic and military reform, and political consolidation...
In horoscopic astrology, a Saturn return is an astrological transit that occurs when the planet Saturn returns to the same ecliptic longitude that it occupied...
The Second Temple period or post-exilic period in Jewish history denotes the approximately 600 years (516 BCE – 70 CE) during which the Second Temple stood...
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