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Çѱ¹¼öÀÚ¿øÇÐȸ / v.41, no.4, 2008³â, pp.405-412
FORGEX ±â¹ýÀ» ÀÌ¿ëÇÑ Çѱ¹ °­¿ìÀÚ·áÀÇ Áö¿ªºóµµÇؼ®¿¡ °üÇÑ ¿¬±¸
( Regional Frequency Analysis of South Korean Rainfall Data Using FORGEX Method )
±èÁ¤¿ø;³²¿ì¼º;½ÅÁÖ¿µ;ÇãÁØÇà; Çѱ¹È¯°æÀÚ¿ø°ø»ç;¿¬¼¼´ëÇб³ ´ëÇпø Åä¸ñ°øÇаú;¿¬¼¼´ëÇб³ ´ëÇпø Åä¸ñ°øÇаú;¿¬¼¼´ëÇб³ »çȸȯ°æ½Ã½ºÅÛ°øÇкÎ;
 
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º» ¿¬±¸¿¡¼­´Â Áö¿ªºóµµÇؼ® ±â¹ý Áß ÇϳªÀÎ FORGEX ±â¹ýÀ» ÀÌ¿ëÇÏ¿© È®·ü°­¿ì·®À» ÃßÁ¤ÇÏ¿´´Ù. ±âÁ¸ÀÇ ¿øÇü ³×Æ®¿öÅ©¿Í 1:1.5, 1:2ÀÇ ºñÀ²À» °®´Â Ÿ¿øÇü ³×Æ®¿öÅ©°¡ Çѱ¹ÀÇ °­¿ìÀÚ·á¿¡ ÀûÇÕÇÑ ¹æ¹ýÀÎÁö¸¦ ÆÇ´ÜÇϱâ À§ÇØ 3 °¡Áö °æ¿ì¸¦ ºñ±³ ºÐ¼®ÇÏ¿´´Ù. ÀÌ ºÐ¼®À» À§Çؼ­ ³²ÇÑÁö¿ªÀÇ 376°³ ÁöÁ¡ÀÇ ¿¬ÃÖ´ë°­¿ìÀڷḦ ÃßÃâÇϰí, ÀÌ ÀÚ·áµéÀ» ¿¬ÃÖ´ëÀÚ·áÀÇ Áß°£°ªÀ¸·Î Ç¥ÁØÈ­ÇÏ¿´´Ù. ³×Æ®¿öÅ©´Â ºÐ¼® ´ë»ó ÁöÁ¡À» Áß½ÉÀ¸·Î Çü¼ºµÇ¸ç, pooled points¿Í netmax ÀڷḦ °¢ ³×Æ®¿öÅ©¿¡¼­ ¸Å³â ÃßÃâÇÑ´Ù. ±×¸®°í ¼ºÀå°î¼±(growth curve)À» À¯µµÇϰí ÁÖ¾îÁø ÀçÇö±â°£¿¡ µû¸¥ È®·ü°­¿ì·®À» ÃßÁ¤ÇÑ´Ù. ÁöÁ¡ºóµµÇؼ®°ú Áö¿ªºóµµÇؼ®ÀÇ ´ëÇ¥ÀûÀÎ ±â¹ýÀÎ È«¼öÁö¼ö¹ý(index flood method), FORGEX ±â¹ýÀÌ Àû¿ëµÇ¾ú°í, À̸¦ ÅëÇØ ¾òÀº °á°ú¸¦ ºñ±³ ºÐ¼®ÇÏ¿´´Ù. ¶ÇÇÑ 36°³ ÁöÁ¡¿¡ ¿øÇü°ú Ÿ¿øÇü ³×Æ®¿öÅ©¸¦ ÀÌ¿ëÇÑ FORGEX ±â¹ýÀ» Àû¿ëÇÏ¿´°í, ±× °á°ú¸¦ ºñ±³ ºÐ¼®ÇÏ¿´´Ù. °á°úÀûÀ¸·Î ´ë»óÁöÁ¡ÀÇ ÁöÁ¡ºóµµÇؼ®À¸·Î ±¸ÇÑ È®·ü°­¿ì·®°ú Áö¿ªºóµµÇؼ®À¸·Î ±¸ÇÑ È®·ü°­¿ì·®ÀÇ Â÷À̰¡ ÀûÀ» ¶§ ¿øÇü°ú Ÿ¿øÇü ³×Æ®¿öÅ©ÀÇ ÃßÁ¤µÈ È®·ü°­¿ì·®ÀÇ Â÷À̵µ Àû¾ú´Ù. ±×·¯³ª ÁöÁ¡ºóµµÇؼ®ÀÇ °á°ú¿Í È«¼öÁö¼ö¹ý °á°úÀÇ Â÷À̰¡ Ŭ ¶§ ¿øÇü°ú Ÿ¿øÇü ³×Æ®¿öÅ©·Î ÃßÁ¤µÈ È®·ü°­¿ì·®ÀÇ Â÷À̵µ ÄÇ´Ù. Ÿ¿øÇü ³×Æ®¿öÅ©°¡ ´õ ¸¹Àº ÁöÁ¡À» Æ÷ÇÔÇÒ ¶§, Ÿ¿øÀ¸·ÎºÎÅÍ ÃßÁ¤µÈ È®·ü°­¿ì·® °ªÀº ¿øÀ¸·Î ±¸ÇØÁø °ªº¸´Ù ³ôÀº Á¤È®µµ¸¦ º¸¿´´Ù. ±×¸®°í Ÿ¿øÀÇ ºñÀ²ÀÌ 1:2ÀÏ ¶§°¡ 1:1.5º¸´Ù È«¼öÁö¼ö¹ýÀ¸·Î ±¸ÇÑ È®·ü°­¿ì·® °ª¿¡ °¡±î¿ü´Ù. ±×·¯¹Ç·Î 1:2 ºñÀ²ÀÇ Å¸¿øÀ» Àû¿ëÇÑ FORGEX ±â¹ýÀÌ Çѱ¹ÀÇ Áö¿ªºóµµÇؼ®¿¡ ÀûÇÕÇÑ ¹æ¹ýÀ̶ó ÇÒ ¼ö ÀÖ´Ù.
Rainfall quantiles were estimated by applying the FORGEX method. The circle network and two elliptical ones with the ratios of 1 to 1.5 and 1 to 2.0 were used and compared to find appropriate one for rainfall data. Annual maximum data were collected from 376 sites and standardized by the median. The networks were organized from the subject sites and then pooled and netmax data were collected from each network. Then, the growth curves and quantiles were estimated. When the subject site had small differences of quantiles from index flood method and at-site frequency analysis, those of the estimated quantiles from circle and elliptical networks were small. In contrast, the sites where the quantile differences are big have big differences of quantiles from circle and elliptical networks. The estimated quantiles from the elliptical network are more accurate than those from the circle network, because the ellipse network contains more sites in South Korea. Moreover, the ellipse with ratio of 1 to 2.0 shows closer quantiles to those from index flood method than one with ratio of 1 to 1.5. It is, therefore, found that the FORGEX method with 1 to 2.0 ellipse network is appropriate regional frequency analysis in South Korea.
 
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Çѱ¹¼öÀÚ¿øÇÐȸ³í¹®Áý / v.41, no.4, 2008³â, pp.405-412
Çѱ¹¼öÀÚ¿øÇÐȸ
ISSN : 1226-6280
UCI : G100:I100-KOI(KISTI1.1003/JNL.JAKO200814264574486)
¾ð¾î : Çѱ¹¾î
³í¹® Á¦°ø : KISTI Çѱ¹°úÇбâ¼úÁ¤º¸¿¬±¸¿ø
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