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Çѱ¹¼öÀÚ¿øÇÐȸ / v.37, no.12, 2004³â, pp.1019-1032
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( Estimates of Regional Flood Frequency in Korea )
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ºóµµÈ«¼ö·®Àº Áߤý¼Ò ¼ö°ø±¸Á¶¹°ÀÇ ¼³°è¿¡ Áß¿äÇÑ ÁöÇ¥·Î¼­ ¸Å¿ì Áß¿äÇϳª, ÀÚ·áÀÇ ºÎÁ·°ú ¼³°è °ü½ÀÀ¸·Î ÀÎÇÏ¿© È«¼ö·®À» Á÷Á¢Çؼ®ÇÏ¿© »ç¿ëÇÏÁö ¸øÇϰí ÀÖ´Â ½ÇÁ¤À¸·Î ¼³°èÈ£¿ì-´ÜÀ§µµ¹ý°ú °°Àº °£Á¢ÀûÀÎ È«¼ö·®ÃßÁ¤¹æ¹ýÀÌ ÀÌ¿ëµÇ°í ÀÖ´Ù. µû¶ó¼­ º» ¿¬±¸¿¡¼­´Â ¼öÁý°¡´ÉÇÑ ÀÏÁ¦½Ã´ëºÎÅÍ 1999³â±îÁö ¸Á¶óÇÑ ±¹³» ÷µÎÈ«¼ö·® ÀڷḦ ¼öÁýÇÏ¿© ¿¬ ÃÖ´ëÄ¡ °è¿­À» ÀÛ¼ºÇϰí Áö¼öÈ«¼ö¹ý¿¡ ÀÇÇØ¼­ Áö¿ªÈ«¼öºóµµºÐ¼®À» ¼öÇàÇÏ¿´´Ù. Áö¿ªÈ«¼öºóµµºÐ¼®À» À§Çؼ­ »ç¿ëµÈ ºÐÆ÷´Â WMO(1989)°¡ ±ÇÀåÇÑ Wakeby ºÐÆ÷¿´À¸¸ç, ¸Å°³º¯¼ö ÃßÁ¤Àº Hosking(1990)ÀÇ L-¸ð¸àÆ®¸¦ ÀÌ¿ëÇÏ¿´´Ù. Áö¿ªÀÇ ¼ö¹®ÇÐÀûÀÎ µ¿Áú¼ºÀ» À§Çؼ­ Hosking°ú Wallis(1993)ÀÇ ºÒÀÏÄ¡¼º, À̻꼺ÀÇ °ËÁ¤À» µû¶ú´Ù. Áö¼öÈ«¼ö¿Í »ó°ü½ÃŲ ¹°¸®ÀûÀÎ µ¶¸³ º¯¼ö´Â À¯¿ª¸éÀûÀ̰í, ÀÌ´Â ºñÀ¯·®ÀÌ À¯¿ª¸éÀûÀÌ Ä¿Áü¿¡ µû¶ó ÀÛ¾ÆÁö´Â ¼ÒÀ§ ¸èÇÔ¼ö ÇüŸ¦ Àß µû¸£°í ÀÖ¾ú´Ù. ¿ì¸®³ª¶ó ÁÖ¿äÀ¯¿ªÀ» 4°³ÀÇ À¯¿ª Áï, ÇѰ­, ³«µ¿°­, ±Ý°­, ¿µ»ê/¼¶Áø°­À¸·Î ³ª´©¾î À¯¿ªº° ÀçÇö±â°£º° È«¼ö·®À» ÀÌ·¯ÇÑ ÇüÅ·ΠÁ¦½ÃÇÏ¿´´Ù. ¶ÇÇÑ ºñ±³¸¦ À§Çؼ­ Á¡ºóµµºÐ¼®¿¡ ÀÇÇÑ Áö¿ªÈ­¸¦ ¼öÇàÇÏ¿© Áö¿ªºóµµ ºÐ¼®ÀÇ °á°ú¿Í ºñ±³ÇÏ¿´´Ù. ´ï °³¹ßÀü°úÀÇ ºñ±³¿¡¼­´Â ´ïÀÇ ¿ªÇÒÀÌ Ã·µÎÈ«¼ö·®ÀÇ º¯È­¿¡ Å« ¿µÇâÀÌ ¾ø´Â °ÍÀ¸·Î ³ªÅ¸³µ´Ù. ÀÌ °á°ú¸¦ ±âÁ¸ÀÇ Å¸ ¿¬±¸¿Í ºñ±³ÇÔÀ¸·Î½á º» ¿¬±¸ÀÇ Å¸´ç¼ºÀ» ±¸Ã¼È­ÇÒ ¼ö ÀÖ¾ú´Ù.
Flood frequency estimate is an essential index for determining the scale of small and middle hydraulic structure. However, this flood quantity could not be estimated directly for practical design purpose due to the lack of available flood data, and indirect method like design rainfall-runoff method have been used for the estimation of design flood. To give the good explain for design flood estimates, regional flood frequency analysis was performed by flood index method in this study. First, annual maximum series were constructed by using the collected data which covers from Japanese imperialism period to 1999. Wakeby distribution recommended by WMO(1989) was used for regional flood frequency analysis and L-moment method by Hosking (1990) was used for parameter estimation. For the homogeneity of region, the discordance and heterogeneity test by Hosking and Wallis(1993) was carried for 4 major watersheds in Korea. Physical independent variable correlated with index flood was watershed area. The relationship between specific discharge and watershed area showed a type of power function, i.e. the specific discharge decreases as watershed area increases. So flood quantity according to watershed area and return period was presented for each watershed(Han rivet, Nakdong river, Geum river and Youngsan/Seomjin river) by using this relation type. This result was also compared with the result of point frequency analysis and its regionalization. It was shown that the dam construction couldn't largely affect the variation of peak flood. The property of this study was also examined by comparison with previous studies.
 
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Áö¿ªÈ«¼öºóµµºÐ¼®;Wakeby ºÐÆ÷;L-¸ð¸àÆ®;¼ö¹®ÇÐÀû µ¿Áú¼º;Regional flood frequency analysis;Wakeby distribution;L-moment;Hydrologic Homogeneity;
 
Çѱ¹¼öÀÚ¿øÇÐȸ³í¹®Áý / v.37, no.12, 2004³â, pp.1019-1032
Çѱ¹¼öÀÚ¿øÇÐȸ
ISSN : 1226-6280
UCI : G100:I100-KOI(KISTI1.1003/JNL.JAKO200414714216695)
¾ð¾î : Çѱ¹¾î
³í¹® Á¦°ø : KISTI Çѱ¹°úÇбâ¼úÁ¤º¸¿¬±¸¿ø
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