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Çѱ¹¼öÀÚ¿øÇÐȸ / v.39, no.8, 2006³â, pp.691-702
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SPI °¡¹³Áö¼öÀÇ EOF ºÐ¼®À» ÀÌ¿ëÇÑ °¡¹³ÀÇ ½Ã°ø°£ÀûÀΠƯ¼º ¿¬±¸
( A Study of Drought Spatio-Temporal Characteristics Using SPI-EOF Analysis ) |
À忬±Ô;±è»ó´Ü;ÃÖ°è¿î; ÀÎõ´ëÇб³ Åä¸ñȯ°æ½Ã½ºÅÛ°øÇаú;ºÎ°æ´ëÇб³ ȯ°æ½Ã½ºÅÛ°øÇкÎ;ÀÎõ´ëÇб³ Åä¸ñȯ°æ½Ã½ºÅÛ°øÇаú;
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º» ¿¬±¸¿¡¼´Â ¿ì¸®³ª¶ó °¡¹³ÀÇ °ø°£ÀûÀΠƯ¼ºÀ» ÆÄ¾ÇÇÏ°í °¡¹³ÀÇ ÁøÇà¿¡ µû¸¥ ÇÇÇØ±Ô¸ð¸¦ »êÁ¤Çϱâ À§ÇÏ¿© °¡¹³ ½Éµµ-¿µÇâ¸éÀû-»ý±âºóµµ °î¼±À» ÀÛ¼ºÇÏ¿© Á¦½ÃÇÏ¿´´Ù. À̸¦ À§ÇÏ¿© Àü±¹ÀÇ ±â»ó°üÃø¼Ò ÁöÁ¡º°·Î SPI¸¦ »êÁ¤ÇÏ¿´À¸¸ç, »êÁ¤µÈ ÁöÁ¡º° SPI ÀڷḦ ÀÌ¿ëÇÏ¿© EOF ºÐ¼®À» ½Ç½ÃÇÏ¿´´Ù. EOF ºÐ¼®À¸·ÎºÎÅÍ ÃßÃâµÈ ÇÙ½É °ø°£ÆÐÅÏÀÚ·áµéÀº ´Ù½Ã °ø°£ÀûÀ¸·Î´Â Kriging ±â¹ýÀ» ÀÌ¿ëÇÏ¿© º¸´Ù ¼¼¹ÐÇÑ °ø°£Á¤º¸¸¦ °®´Â ÀÚ·á·Î È®ÀåµÇ¾úÀ¸¸ç, ARMA ¸ðÇüÀ» ÀÌ¿ëÇÏ¿© Àå±â°£ÀÇ °¡¹³»ç»óÀ» ¸ðÀǹ߻ýÇÏ¿´´Ù. ¸ðÀǹ߻ýµÈ °ø°£ÀûÀÎ Àå±â°£ÀÇ °¡¹³»ç»óµé·ÎºÎÅÍ Æ¯Á¤ °¡¹³½Éµµº° ¿µÇâ¸éÀûº° »ý±âºóµµ °î¼±À» ÀÛ¼ºÇÒ ¼ö ÀÖ¾ú´Ù. |
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This study introduced a method to evaluate the probability of a specific area to be affected by a drought of a given severity and shows Its potential for investigating agricultural drought characteristics. The method was applied to South Korea as a case study. The proposed procedure included Standardized Precipitation Index(SPI) time series, which were linearly transformed by the Empirical Orthogonal Functions(EOF) method. These EOFs were extended temporally with AutoRegressive Moving Average(ARMA) method and spatially with Kriging method. By performing these simulations, long time series of SPI can be simulated for each designed grid cell in whole area. The probability distribution functions of the area covered by a drought and the drought severity are then derived and combined to produce drought severity-area-frequency(SAF) curves. |
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Ű¿öµå |
°¡¹³;Drought;SPI;EOF;Kriging;ARMA; |
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Çѱ¹¼öÀÚ¿øÇÐȸ³í¹®Áý / v.39, no.8, 2006³â, pp.691-702
Çѱ¹¼öÀÚ¿øÇÐȸ
ISSN : 1226-6280
UCI : G100:I100-KOI(KISTI1.1003/JNL.JAKO200634741444882)
¾ð¾î : Çѱ¹¾î |
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³í¹® Á¦°ø : KISTI Çѱ¹°úÇбâ¼úÁ¤º¸¿¬±¸¿ø |
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