Hello §Ú¥s ¡§¶W¤H¡¨
»æ¾Â¤¸¦Ñ
¶W¯Å¤â¶ïªv¦ä°g Åwªï¥æ¬y ~
¬d¬Ý¸Ô²Ó¸ê®Æ
TOP
ì©«¥Ñ ULTRA2020 ©ó 25-7-2012 01:11 µoªí
ª©¥D
©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
´îªÎ¬O¹ï¨Å馳®`
¥|²´¦PªÎ³£¬Oø°·±d...
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 ".. ...
¶W¯Åª©¥D