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Çѱ¹¼öÀÚ¿øÇÐȸ / v.35, no.5, 2002³â, pp.575-581
°­¼öÀÇ °èÀý¼º°ú ¸éÀûÆò±Õ°­¼ö·®ÀÇ ÃßÁ¤¿ÀÂ÷
( Rainfall Seasonality and Estimation Errors of Area-Average Rainfall )
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º» ¿¬±¸¿¡¼­´Â °­¼öÀÇ °èÀý¼º¿¡ µû¶ó ¸éÀûÆò±Õ°­¼öÀÇ ÃßÁ¤¿ÀÂ÷°¡ ¾î¶»°Ô ´Þ¶óÁö´ÂÁö¸¦ Æò°¡ÇÏ¿´´Ù. °ø°£»ó°üÀ» °í·ÁÇÏ´Â °æ¿ì¿Í °í·ÁÇÏÁö ¾Ê´Â °æ¿ì ¸ðµÎ¸¦ ´Ù·ç¾úÀ¸¸ç, °¢°¢ÀÇ °æ¿ì¿¡ ´ëÇØ ÃßÁ¤¿ÀÂ÷ÀÇ º¯È­¸¦ »ìÆìº¸¾Ò´Ù. À¯»çÇÑ °æ¿ì·Î¼­ °èÀý¼ºÀ» ¹«½ÃÇÏ°í ´©°¡½Ã°£À» Áõ°¡½ÃÄÑ ÃßÁ¤¿ÀÂ÷°¡ ¾î¶»°Ô º¯ÇÏ´ÂÁöµµ »ìÆìº¸¾Ò´Ù. º» ¿¬±¸´Â ±Ý°­À¯¿ª¿¡ Àû¿ëÇÏ¿´À¸¸ç 30³â ÀÌ»óÀÇ ÀÏ °­¼ö ±â·ÏÀ» °¡Áø 28°³ ÁöÁ¡ÀÇ ÀڷḦ ÀÌ¿ëÇÏ¿´´Ù. º» ¿¬±¸ÀÇ °á°ú¸¦ Á¤¸®ÇÏ¸é ´ÙÀ½°ú °°´Ù: (1) ¿ù ´ÜÀ§ÀÇ ¸éÀûÆò±Õ°­¼ö·®¿¡ ´ëÇÑ ÃßÁ¤¿ÀÂ÷´Â ´ëü·Î °­¼ö·®¿¡ ºñ·ÊÇÏ¿© ³ªÅ¸³ª¸ç, µû¶ó¼­ °­ÇÑ °èÀý¼ºÀ» ³ªÅ¸³½´Ù. ±×·¯³ª À̸¦ Æò±Õ °­¼ö·®À¸·Î ³ª´« »ó´ë¿ÀÂ÷´Â 1¿ù°ú 12¿ùÀ» Á¦¿ÜÇÏ¸é ´ë·« 5 - 8% Á¤µµ·Î À¯»çÇÑ °ªÀ» º¸ÀδÙ. (2) ¿¬ °­¼ö·®¿¡ ´ëÇÑ ÃßÁ¤¿ÀÂ÷´Â ¿¬°­¼ö·®ÀÇ 3% Á¤µµÀÎ °ÍÀ¸·Î ³ªÅ¸³µ´Ù. (3) ±×·¯³ª, °­¼ö·®ÀÌ ¾Æ´Ñ °­¼ö·®ÀÇ Ç¥ÁØÆíÂ÷¸¦ ±âÁØÀ¸·Î »ï´Â °æ¿ì ¸éÀûÆò±Õ°­¿ìÀÇ ÃßÁ¤¿ÀÂ÷´Â ¿ù ´ÜÀ§ ¹× ³â ´ÜÀ§¿¡¼­ µ¿ÀÏÇÏ°Ô Ç¥ÁØÆíÂ÷ÀÇ 11% Á¤µµ·Î °è»êµÈ´Ù. (4) ¸¶Áö¸·À¸·Î, °ø°£»ó°üÀ» °í·ÁÇÏÁö ¾Ê´Â °æ¿ìÀÇ ÃßÁ¤¿ÀÂ÷´Â °í·ÁÇÏ´Â °æ¿ìÀÇ 2¹è Á¤µµ±îÁö Ä¿ÁüÀ» È®ÀÎÇÒ ¼ö ÀÖ¾ú´Ù.
This study evaluates the variation of estimation error of area-average rainfall due to rainfall seasonality. Both the cases considering and not considering the spatial correlation are compared to derive the characteristics of estimation error. Similar cases with different accumulation time without considering the rainfall seasonality are also investigated. This study was applied to the Geum-river basin with total 28 rain gauge measurements haying more than 30 years of daily rainfall measurements. As results of the study we found that: (1) The absolute estimation error of monthly area-average rainfall show strong seasonality like the total rainfall amount. However, the relative estimation error normalized by its mean was estimated to have similar values about 5 to 8% except January and December. (2) The relative estimation error of annual area-average rainfall estimated was found to have the estimation error about 3% of its annual mean. (3) However, the relative estimation error normalized by the standard deviation remains almost the same for both monthly and annual rainfall amounts, which was estimated about 11% of its standard deviation. (4) Finally, the estimation error without considering the spatial correlation was found to become almost twice the estimation error with considering the spatial correlation.
 
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°èÀý¼º;¸éÀûÆò±Õ°­¼ö·®;ÃßÁ¤¿ÀÂ÷;seasonality;area average rainfall;estimation error;
 
Çѱ¹¼öÀÚ¿øÇÐȸ³í¹®Áý / v.35, no.5, 2002³â, pp.575-581
Çѱ¹¼öÀÚ¿øÇÐȸ
ISSN : 1226-6280
UCI : G100:I100-KOI(KISTI1.1003/JNL.JAKO200211921445034)
¾ð¾î : Çѱ¹¾î
³í¹® Á¦°ø : KISTI Çѱ¹°úÇбâ¼úÁ¤º¸¿¬±¸¿ø
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