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Çѱ¹¼öÀÚ¿øÇÐȸ / v.43, no.4, 2010³â, pp.337-351
±ØÄ¡°­¿ì»ç»óÀ» Æ÷ÇÔÇÑ °­¿ìºóµµºÐ¼®ÀÇ ºÒÈ®½Ç¼º ºÐ¼®
( Analysis of Uncertainty of Rainfall Frequency Analysis Including Extreme Rainfall Events )
±è»ó¿í;À̱漺;¹Ú¿µÁø; ±¹È¸ÀÔ¹ýÁ¶»çó °æÁ¦»ê¾÷Á¶»ç½Ç ±¹ÅäÇØ¾çÆÀ;¼­¿ï´ëÇб³ °ø°ú´ëÇÐ °Ç¼³.ȯ°æ°øÇкÎ;¼­ÀÏ´ëÇб³ Åä¸ñ°ú;
 
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±ØÄ¡»ç»óÀ» ¿¹ÃøÇϱâ À§ÇÑ ±âÁ¸ÀÇ ºóµµºÐ¼® °á°úÀÇ À̿뿡 ´ëÇÑ ¸¹Àº ¹®Á¦Á¡µéÀÌ ºÎ°¢µÇ°í ÀÖ´Ù. ƯÈ÷, Åë°èÀû ¸ðÇüÀ» ÀÌ¿ëÇϱâ À§Çؼ­ ÈçÈ÷ »ç¿ëµÇ´Â Á¡±ÙÀû ¸ðÇü (asymptotic model)ÀÇ ÇÕ¸®ÀûÀÎ °ËÅä ¾ø´Â ¿Ü»ð (extrapolation)Àº »êÁ¤µÈ È®·ü °ªÀ» °ú´ë ¶Ç´Â °ú¼ÒÆò°¡ÇÏ´Â ¹®Á¦¸¦ ÀÏÀ¸ÄÑ, ¿¹Ãø°á°ú¿¡ ´ëÇÑ ºÒÈ®½Ç¼ºÀ» °ú´ÙÇÏ°Ô »êÁ¤ÇÔÀ¸·Î½á ºÒÈ®½Ç¼º¿¡ ´ëÇÑ ½Å·Úµµ¸¦ °¨¼Ò½ÃŰ´Â ¹®Á¦°¡ ÀÖ´Ù. ±×·¯¹Ç·Î º» ¿¬±¸¿¡¼­´Â ±¹³»¿¡¼­ ±ØÄ¡°­¿ì»ç»óÀ» Æ÷ÇÔÇÑ °­¿ìÀÚ·áÀÇ ºóµµºÐ¼®¿¡ ´ëÇÑ ¿¬±¸»ç·Ê¸¦ Á¦°øÇϰí Á¡±ÙÀû ¸ðÇüÀ» »ç¿ëÇÏ´Â °æ¿ì ¹ß»ýµÇ´Â ºÒÈ®½Ç¼ºÀ» °¨¼Ò½Ã۱â À§ÇÑ ¹æ¹ý·ÐÀ» Á¦½ÃÇÏ¿´´Ù. À̸¦ À§ÇÏ¿© º» ¿¬±¸¿¡¼­´Â ±ØÄ¡°­¿ì»ç»óÀÇ ºóµµºÐ¼®À» ¼öÇàÇÏ´Â µ¥ À־ ÃÖ±Ù µé¾î ¿©·¯ ºÐ¾ß¿¡¼­ ´Ù¾çÇÏ°Ô Àû¿ëµÇ°í ÀÖ´Â Bayesian MCMC (Markov Chain Monte Carlo) ¹æ¹ýÀ» »ç¿ëÇÏ¿´À¸¸ç, ±× °á°ú¸¦ ÃÖ¿ìÃßÁ¤¹æ¹ý (Maximum likelihood estimation method)°ú ºñ±³ÇÏ¿´´Ù. ƯÈ÷ °­¿ì»ç»óÀÇ Á¡ ºóµµºÐ¼®¿¡ ÈçÈ÷ ÀÌ¿ëµÇ´Â È®·ü¹ÐµµÇÔ¼ö·Î GEV (Generalized Extreme Value) ºÐÆ÷¿Í Gumbel ºÐÆ÷¸¦ ¸ðµÎ °í·ÁÇÏ¿© µÎ ºÐÆ÷ÀÇ °á°ú¸¦ ºñ±³ÇÏ¿´À¸¸ç, ÀÌ °úÁ¤¿¡¼­ °¢°¢ÀÇ »êÁ¤°á°ú ¹× ºÒÈ®½Ç¼ºÀº ±Ù»ç½ÄÀ» ÀÌ¿ëÇÑ ÃÖ¿ìÃßÁ¤¹æ¹ý°ú Bayesian ¹æ¹ýÀ» ÀÌ¿ëÇÏ¿© °¢°¢ ºñ±³ ¹× ºÐ¼®µÇ¾ú´Ù.
There is a growing dissatisfaction with use of conventional statistical methods for the prediction of extreme events. Conventional methodology for modeling extreme event consists of adopting an asymptotic model to describe stochastic variation. However asymptotically motivated models remain the centerpiece of our modeling strategy, since without such an asymptotic basis, models have no rational for extrapolation beyond the level of observed data. Also, this asymptotic models ignored or overestimate the uncertainty and finally decrease the reliability of uncertainty. Therefore this article provide the research example of the extreme rainfall event and the methodology to reduce the uncertainty. In this study, the Bayesian MCMC (Bayesian Markov Chain Monte Carlo) and the MLE (Maximum Likelihood Estimation) methods using a quadratic approximation are applied to perform the at-site rainfall frequency analysis. Especially, the GEV distribution and Gumbel distribution which frequently used distribution in the fields of rainfall frequency distribution are used and compared. Also, the results of two distribution are analyzed and compared in the aspect of uncertainty.
 
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ºÒÈ®½Ç¼º;±ØÄ¡°­¿ì»ç»ó;ÃÖ¿ìÃßÁ¤¹æ¹ý;uncertainty;extreme rainfall event;bayesian MCMC;MLE;
 
Çѱ¹¼öÀÚ¿øÇÐȸ³í¹®Áý / v.43, no.4, 2010³â, pp.337-351
Çѱ¹¼öÀÚ¿øÇÐȸ
ISSN : 1226-6280
UCI : G100:I100-KOI(KISTI1.1003/JNL.JAKO201013343111216)
¾ð¾î : Çѱ¹¾î
³í¹® Á¦°ø : KISTI Çѱ¹°úÇбâ¼úÁ¤º¸¿¬±¸¿ø
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