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Çѱ¹¼öÀÚ¿øÇÐȸ / v.42, no.8, 2009³â, pp.659-671
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·¹ÀÌ´õ ÀÚ·áÀÇ ±ºÁýȸ¦ ÅëÇÑ Mean Field Rainfall BiasÀÇ º¸Á¤
( Adjustment of the Mean Field Rainfall Bias by Clustering Technique ) |
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º» ¿¬±¸¿¡¼´Â ·¹ÀÌ´õ °¿ì·® ÀÚ·áÀÇ ÆíÂ÷º¸Á¤¿¡ »ç¿ëµÇ´Â G/RºñÀÇ Á¤È®µµ¸¦ Çâ»ó½Ã۱â À§ÇÏ¿© fuzzy c-means ¹æ¹ýÀ» »ç¿ëÇÑ ÀÚ·áÀÇ ±ºÁýȸ¦ Àû¿ëÇÏ¿´´Ù. ´ë»ó ·¹ÀÌ´õÀÚ·á´Â ±¤´ö»ê ·¹ÀÌ´õ±âÁöÀÇ ÀÚ·á·Î¼ À¯È¿¹üÀ§ 100kmÀ̳»ÀÇ ÀڷḦ ´ë»óÀ¸·Î Áö»ó°üÃø¸ÁÀÎ ±â»óûÀÇ AWS(Automatic Weather System) ÁöÁ¡¿¡¼ °üÃøÇÑ ÀÚ·á¿ÍÀÇ ºñ±³¸¦ ÅëÇÏ¿© G/Rºñ¸¦ ±¸ÇÏ¿´´Ù. G/Rºñ¸¦ ±¸Çϴµ¥ ÀÖ¾î¼ Àüü À¯È¿¹üÀ§¸¦ ´ë»óÀ¸·Î µ¿ÀÏÇÑ ¹æ¹ýÀ» »ç¿ëÇÑ °æ¿ì¿Í ·¹ÀÌ´õ ÀÚ·áÀÇ ±ºÁýȸ¦ ÅëÇØ¼ ÁöÇüÀûÀÎ È¿°ú¸¦ °í·ÁÇÑ °æ¿ì¸¦ ºñ±³ÇÏ¿´À¸¸ç, AWS ½ÇÃø°¿ì·®°ú G/Rºñ¸¦ ÅëÇÑ ·¹ÀÌ´õ °¿ì·® ÀÚ·áÀÇ ºñ±³¸¦ À§ÇÏ¿© Àý´ë»ó´ë¿ÀÂ÷¿Í Æò±ÕÁ¦°ö±Ù¿ÀÂ÷ µîÀ» ºñ±³ºÐ¼®ÇÏ¿´´Ù. ±× °á°ú ÀüüÀ¯È¿¹üÀ§¸¦ ´ë»óÀ¸·Î µ¿ÀÏÇÏ°Ô G/Rºñ¸¦ Àû¿ëÇÏ¿© ±¸ÇÑ ·¹ÀÌ´õ °¿ì·®¿¡ ºñÇÏ¿© ±ºÁýºÐ¼®À» ÀÌ¿ëÇÏ¿© ÁöÇüÈ¿°ú¸¦ °í·ÁÇÑ G/Rºñ¸¦ Àû¿ëÇÑ ·¹ÀÌ´õ °¿ì·®ÀÇ ¿ÀÂ÷°¡ ´õ Àû°Ô ³ªÅ¸³µ´Ù. |
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Fuzzy c-means clustering technique is applied to improve the accuracy of G/R ratio used for rainfall estimation by radar reflectivity. G/R ratio is computed by the ground rainfall records at AWS(Automatic Weather System) sites to the radar estimated rainfall from the reflectivity of Kwangduck Mt. radar station with 100km effective range. G/R ratio is calculated by two methods: the first one uses a single G/R ratio for the entire effective range and the other two different G/R ratio for two regions that is formed by clustering analysis, and absolute relative error and root mean squared error are employed for evaluating the accuracy of radar rainfall estimation from two G/R ratios. As a result, the radar rainfall estimated by two different G/R ratio from clustering analysis is more accurate than that by a single G/R ratio for the entire range. |
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Ű¿öµå |
·¹ÀÌ´õ °¿ì·®;G/R ÆíÂ÷º¸Á¤;radar rainfall;mean field bias;fuzzy c-means clustering;G/R bias adjustment; |
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Çѱ¹¼öÀÚ¿øÇÐȸ³í¹®Áý / v.42, no.8, 2009³â, pp.659-671
Çѱ¹¼öÀÚ¿øÇÐȸ
ISSN : 1226-6280
UCI : G100:I100-KOI(KISTI1.1003/JNL.JAKO200925836515258)
¾ð¾î : Çѱ¹¾î |
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³í¹® Á¦°ø : KISTI Çѱ¹°úÇбâ¼úÁ¤º¸¿¬±¸¿ø |
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