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Çѱ¹¼öÀÚ¿øÇÐȸ / v.40, no.12, 2007³â, pp.943-956
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( On the Variations of Spatial Correlation Structure of Rainfall ) |
| ±è°æÁØ;À¯Ã¶»ó; °í·Á´ëÇб³ »çȸȯ°æ½Ã½ºÅÛ°øÇаú;°í·Á´ëÇб³ »çȸȯ°æ½Ã½ºÅÛ°øÇаú;
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| °¿ìÀåÀÇ Æ¯¼ºÀ» Á¤·®ÈÇÏ´Â ¿©·¯ Åë°èÀû Ư¼ºÄ¡ Áß¿¡ ÀÚÁÖ »ç¿ëµÇ´Â °ø°£»ó°üÇÔ¼ö(¶Ç´Â °ø°£»ó°üµµ)´Â °¿ìÀÇ Æò°¡³ª ¼³°è ±×¸®°í °¿ìÀåÀ» ¸ðÇüÈÇϴµ¥ Áß¿äÇÏ°Ô »ç¿ëµÈ´Ù. ±×·¯³ª °¿ìÀÇ °ø°£»ó°ü ±¸Á¶´Â ¿©·¯ ¿äÀο¡ ÀÇÇØ ¸¹Àº º¯µ¿¼ºÀ» °¡Áö°í ÀÖ´Ù. ÀÌ¿Í °°Àº °¿ìÀÇ °ø°£»ó°ü±¸Á¶¿¡ ´ëÇÑ º¯µ¿Æ¯¼ºÀº À¯¿ªÀ» ´ëÇ¥ÇÏ´Â °ø°£»ó°ü±¸Á¶¸¦ °áÁ¤Çϴµ¥ ¹®Á¦Á¡À¸·Î ÀÛ¿ëÇÑ´Ù. µû¶ó¼ º» ¿¬±¸¿¡¼´Â À̺¯·® È¥ÇÕºÐÆ÷¸¦ ÀÌ¿ëÇÏ¿© °¿ì¸¦ ¸ðÇüÈÇÑ ÈÄ Á¤±ÔºÐÆ÷¿Í ´ë¼öÁ¤±ÔºÐÆ÷¸¦ °í·ÁÇÏ¿© ¿ùº°, ÀÚ·áÀÇ ½Ã°£°£°Ýº°·Î °ø°£»ó°üµµ¸¦ À¯µµÇÏ°í ±× º¯µ¿Æ¯¼ºÀ» ÆÄ¾ÇÇÏ¿´´Ù. ´ë»óÀ¯¿ªÀÎ ±Ý°À¯¿ªÀÇ 28°³ °¿ì°üÃø¼ÒÀÇ ÀڷḦ ÀÌ¿ëÇÑ °á°ú ´ÙÀ½°ú °°Àº °á·ÐÀ» ¾òÀ» ¼ö ÀÖ¾ú´Ù. (1) ¹«°¿ìÀÚ·á¿¡ ´ëÇÑ ¿µÇâÀ» °í·ÁÇÑ °á°ú, ¼¼ °¡ÁöÀÇ °æ¿ì(Case A, B, C) Áß¿¡¼ Case A(+,+)ÀÇ °æ¿ì°¡ #0#¿¡ ´ëÇÑ °ø°£»ó°üÇÔ¼öÀÇ ¿Ö°îÀÌ ÃÖ¼Ò°¡ µÇ±â ¶§¹®¿¡ °¡Àå ÀûÀýÇÑ °æ¿ìÀÌ´Ù. (2) ÀϹÝÀûÀ¸·Î »ç¿ëµÇ´Â Á¤±ÔºÐÆ÷º¸´Ù´Â ÀÌ·ÐÀû ±×¸®°í ½ÇÁõÀûÀ¸·Î ´õ ÀûÀýÇÑ ´ë¼öÁ¤±ÔºÐÆ÷¸¦ »ç¿ëÇØ¾ß ÇÔÀÌ ¹Ù¶÷Á÷ÇÏ´Ù. (3) ¿ùº° °ø°£»ó°üÇÔ¼ö Áß Áö¼öÇÔ¼öÀûÀÎ °¨¼Ò°æÇâÀÌ °¡Àå ¶Ñ·ÇÇÑ 7¿ùÀÇ °æ¿ì°¡ À¯¿ªÀ» ´ëÇ¥ÇÏ´Â °ø°£»ó°üÇÔ¼ö·Î ÀûÀýÇÏ´Ù. (4) ÀÚ·áÀÇ ½Ã°£Çػ󵵺° °ø°£»ó°üµµ´Â ´Ù¸£°Ô À¯µµµÇ±â ¶§¹®¿¡ °¢°¢¿¡ ´ëÇÑ °æ¿ì¸¦ °í·ÁÇØ¾ß ÇÑ´Ù. |
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| Among various statistics, the spatial correlation function, that is "correlogram", is frequently used to evaluate or design the rain gauge network and to model the rainfall field. The spatial correlation structure of rainfall has the significant variation due to many factors. Thus, the variation of spatial correlation structure of rainfall causes serious problems when deciding the spatial correlation function of rainfall within the basin. In this study, the spatial rainfall structure was modeled using bivariate mixed distributions to derive monthly spatial correlograms, based on Gaussian and lognormal distributions. This study derived the correlograms using hourly data of 28 rain gauge stations in the Keum river basin. From the results, we concluded as following; (1) Among three cases (Case A, Case B, Case C) considered, the Case A(+,+) seems to be the most relevant as it is not distorted much by zero measurements. (2) The spatial correlograms based on the lognormal distribution, which is theoretically as well as practically adequate, is better than that based on the Gaussian distribution. (3) The spatial correlation in July exponentially decrease more obviously than those in other months. (4) The spatial correlograms should be derived considering the temporal resolution(hourly, daily, etc) of interest. |
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| °ø°£»ó°üÇÔ¼ö;È¥ÇÕºÐÆ÷;Á¤±ÔºÐÆ÷;´ë¼öÁ¤±ÔºÐÆ÷;spatial correlation function;mixed distribution;gaussian distribution;lognormal distribution; |
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Çѱ¹¼öÀÚ¿øÇÐȸ³í¹®Áý / v.40, no.12, 2007³â, pp.943-956
Çѱ¹¼öÀÚ¿øÇÐȸ
ISSN : 1226-6280
UCI : G100:I100-KOI(KISTI1.1003/JNL.JAKO200704503862949)
¾ð¾î : Çѱ¹¾î |
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| ³í¹® Á¦°ø : KISTI Çѱ¹°úÇбâ¼úÁ¤º¸¿¬±¸¿ø |
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