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­ì©«¥Ñ ULTRA2020 ©ó 25-7-2012 01:11 µoªí
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©Ò¿× 500¦~"¤@¹J"¡A§Ú²q¬O²Î­p¾Ç¤¤ªº"return period" (= 500 years)¡Ai.e. "¥ô¦ó¤@¦~«×¤º, µo¥Íªº¾÷²v¬O 1/500"¡A¨Ã¤£¥Nªí¯uªº­n500¦~¤~¯àµo¥Í¡C

 

http://en.wikipedia.org/wiki/Return_period

 

"... This does not mean that a 100 year flood will happen regularly every 100 years, despite the connotations of the name "return period". In any given 100 year period, a 100 year event may occur once, twice, more, or not at all..."

 

http://www.dsd.gov.hk/TC/Files/flood_prevention/flood_protection_standards/cstandard02.pdf

¤¤§ø¶®«TÃh°Ï:
http://hk.myblog.yahoo.com/masatoshi-forever



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­ì©«¥Ñ ar_woo ©ó 25-7-2012 01:53 µoªí ©Ò¿× 500¦~"¤@¹J"¡A§Ú²q¬O²Î­p¾Ç¤¤ªº"return period" (= 500 years)¡Ai.e. "¥ô¦ó¤@¦~«×¤º, µo¥Íªº¾÷²v¬O 1/500"¡A¨Ã¤£¥Nªí¯uªº­n500¦~¤~¯àµo¥Í¡C   http://en.wikipedia.org/wiki/Return_period   ".. ...

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¤Þ¥Î:
­ì©«¥Ñ ar_woo ©ó 25-7-2012 01:53 µoªí ©Ò¿× 500¦~"¤@¹J"¡A§Ú²q¬O²Î­p¾Ç¤¤ªº"return period" (= 500 years)¡Ai.e. "¥ô¦ó¤@¦~«×¤º, µo¥Íªº¾÷²v¬O 1/500"¡A¨Ã¤£¥Nªí¯uªº­n500¦~¤~¯àµo¥Í¡C   http://en.wikipedia.org/wiki/Return_period   ".. ...

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