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Çѱ¹¼öÀÚ¿øÇÐȸ / v.34, no.2, 2001³â, pp.119-130
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L-¸ð¸àÆ®¹ýÀ» ÀÌ¿ëÇÑ ÇѰÀ¯¿ª Àϰ¿ì·®ÀÚ·áÀÇ Áö¿ªºóµµÇؼ®
( Frequency Analysis of Daily Rainfall in Han River Basin Based on Regional L-moments Algorithm ) |
| À̵¿Áø;ÇãÁØÇà; ¿¬¼¼´ëÇб³ Åä¸ñ°øÇаú;¿¬¼¼´ëÇб³ »çȸȯ°æ¡¤°ÇÃà°øÇкΠÅä¸ñÀü°ø;
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| º» ¿¬±¸¿¡¼´Â ÇѰÀ¯¿ªÀÇ 1ÀÏ, 2ÀÏ, 3ÀÏ ¿¬ÃÖ´ë°¿ìÀڷḦ ´ë»óÀ¸·Î L-¸ð¸àÆ®¹ýÀ» ÀÌ¿ëÇÑ ÁöÁ¡ ºóµµÇؼ®°ú Áö¿ª ºóµµÇؼ®À» ½Ç½ÃÇÏ¿© ±× °á°ú¸¦ ºñ±³ÇÏ¿´´Ù. Áö¿ªºóµµÇؼ®À» ½Ç½ÃÇϱâ À§ÇÏ¿© ÇѰÀ¯¿ªÀ» ³²ÇѰ, ºÏÇѰ, ÇѰÇÏ·ùºÎ À¯¿ªÀÇ 3°³ ¼ÒÀ¯¿ªÀ¸·Î ºÐÇÒÇϰí, °¢ À¯¿ª¿¡ ´ëÇÑ ÀÚ·áÀÇ À̻굵 ¹× µ¿Áú¼ºÀ» °ËÅäÇÏ¿´À¸¸ç, °¢ ¼ÒÀ¯¿ª¿¡ ´ëÇÏ¿© ¿©·¯ ºÐÆ÷ÇüÀ» Àû¿ëÇÑ °á°ú, ³²ÇѰÀ¯¿ª°ú ÇѰÇÏ·ùºÎ À¯¿ªÀº lognormal ºÐÆ÷Çü, ºÏÇѰ À¯¿ªÀº gamma-3 ºÐÆ÷ÇüÀÌ ÀûÁ¤ºÐÆ÷ÇüÀ¸·Î ¼±Á¤µÇ¾ú´Ù. Áö¿ªºóµµÇؼ®°ú ÁöÁ¡ºóµµÇؼ®À» ÅëÇÏ¿© ¼±Á¤µÈ È®·üºÐÆ÷ÇüÀ» ÀÌ¿ë, Monte Carlo ¸ðÀǸ¦ ¼öÇàÇÏ¿´À¸¸ç, ÀçÇö±â°£¿¡ µû¸¥ »ó´ëÆíÀÇ¿Í »ó´ëÁ¦°ö±Ù ¿ÀÂ÷¸¦ »êÁ¤ÇÏ¿´´Ù. Áö¿ªºóµµÇؼ®°ú ÁöÁ¡ºóµµÇؼ®À» ºñ±³ÇÑ °á°ú »ó´ëÁ¦°ö±Ù¿ÀÂ÷¿¡ ÀÖ¾î¼ Áö¿ªºóµµÇؼ®À» ¼öÇàÇÑ °æ¿ì°¡ ÁöÁ¡ºóµµÇؼ®¿¡ ºñÇØ ±× °á°ú°¡ ¿ì¼öÇÏ¿´À¸¸ç, ÀçÇö±â°£ÀÌ Ä¿Áú¼ö·Ï ±× Â÷ÀÌ´Â ÇöÀúÇÏ°Ô ³ªÅ¸³µ´Ù. µû¶ó¼, ÇѰÀ¯¿ªÀÇ °¿ì·®¿¡ ´ëÇØ¼ Áö¿ªºóµµÇؼ® ¼öÇàÇÔÀÌ ÁöÁ¡ºóµµÇؼ®¿¡ ºñÇØ ¿ì¼öÇÏ´Ù´Â °á·ÐÀ» ¾ò°Ô µÇ¾ú´Ù. |
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| At-site and regional frequency analyses of annual maximum 1-, 2-, and 3-days rainfall in Han River basin was performed and compared based on the regional L-moments algorithm. To perform regional frequency analysis, Han River basin was subdivided into 3 sub-basins such as South Han River, North Han River, and downstream regions. For each sub-basin, the discordancy and homogeneity tests were performed. As the results of goodness of fit tests, lognormal model was selected as an appropriate probability distribution for both South Han River and downstream regions and gamma-3 model for North han River region. From Monte carlo simulation, RBIAS and RRMSE of the estimated quantiles from regional frequency analysis and at-site frequency analysis were calculated and compared each other. Regional frequency analysis shows less RRMSE of the estimated quantiles than at-sites frequency analysis in overall return periods. The differences of BRMSE between two approaches increase as the return period increases. As a result, it is shown that regional frequency analysis performs better than at-site analysis for annual maximum rainfall data in Han River basin. |
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| Ű¿öµå |
| at-site frequency analysis;regional frequency analysis;simulationl;L-moments algorithm;RBIAS;RRMSE; |
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Çѱ¹¼öÀÚ¿øÇÐȸ³í¹®Áý / v.34, no.2, 2001³â, pp.119-130
Çѱ¹¼öÀÚ¿øÇÐȸ
ISSN : 1226-6280
UCI : G100:I100-KOI(KISTI1.1003/JNL.JAKO200111920731790)
¾ð¾î : Çѱ¹¾î |
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| ³í¹® Á¦°ø : KISTI Çѱ¹°úÇбâ¼úÁ¤º¸¿¬±¸¿ø |
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