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Çѱ¹¼öÀÚ¿øÇÐȸ / v.34, no.4, 2001³â, pp.317-326
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( Estimation of Area Average Rainfall Amount and Its Error ) |
| À¯Ã¶»ó;Á¤±¤½Ä; °í·Á´ëÇб³ ȯ°æ°øÇаú;°í·Á´ëÇб³ ´ëÇпø ȯ°æ°øÇаú;
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| º» ¿¬±¸¿¡¼´Â »ê¼úÆò±Õ¹ý, ThiessenÀÇ °¡Á߯ò±Õ¹ý ¹× ÃßÁ¤À̷п¡ ±Ù°ÅÇÑ ÃÖÀû°¡ÁßÄ¡¸¦ ÀÌ¿ëÇÏ´Â ¹æ¹ýÀ¸·Î ¸éÀûÆò±Õ°¿ì·®À» °è»êÇÏ°í °¢°¢ÀÇ °æ¿ì¿¡ ´ëÇØ ¿ÀÂ÷¸¦ Æò°¡ÇØ º¸¾Ò´Ù. º» ¿¬±¸¿¡¼´Â ³²ÇѰ À¯¿ªÀÇ ¿µ¿ù »ó·ùÁö¿ªÀ» ´ë»óÀ¸·Î ÇÏ¿© ¼öÇàÇÏ¿´À¸¸ç ±× °á°ú¸¦ Á¤¸®ÇÏ¸é ´ÙÀ½°ú °°´Ù. ¸ÕÀú À¯¿ª ³» °¿ì°è°¡ ±ÕµîÇÏ°Ô ºÐÆ÷µÇ¾î ÀÖ´Â °æ¿ì »ê¼úÆò±Õ¹ýÀ̳ª ThiessenÀÇ °¡Á߯ò±Õ¹ýÀ» ÀÌ¿ëÇÑ °á°ú¿¡´Â Å« Â÷À̰¡ ¾ø´Ù. ±×·¯³ª ÀÌµé µÎ ¹æ¹ýÀº °¿ìÀÇ °ø°£Àû º¯µ¿¼ºÀ» °í·ÁÇÏÁö ¸øÇÏ´Â ÀÌÀ¯·Î ƯÈ÷ °¿ìÀÇ º¯µ¿¼ºÀÌ Å« °æ¿ì ¸éÀûÆò±Õ°¿ìÀÇ ÃßÁ¤¿¡ Å« ¿ÀÂ÷¸¦ ³»Æ÷ÇÒ ¼ö ÀÖ´Ù. ÀÌ·¯ÇÑ ÃßÁ¤¿ÀÂ÷´Â °¿ìÀÇ °ø°£Àû º¯µ¿¼ºÀ» °í·ÁÇÏ´Â ÃßÁ¤À̷п¡ ±Ù°ÅÇÑ ¹æ¹ý¿¡ ºñÇØ ¸Å¿ì Å« °ªÀ» ³ªÅ¸³¿À» È®ÀÎÇÏ¿´´Ù. µû¶ó¼, ¿ì¸®³ª¶óÀÇ ¿©¸§Ã¶ °¿ìó·³ ±× °ø°£Àû º¯µ¿¼ºÀÌ Å« °æ¿ì¿¡ ±âÁ¸ÀÇ »ê¼úÆò±Õ¹ýÀ̳ª ThiessenÀÇ °¡Á߯ò±Õ¹ýÀº »ó´çÈ÷ Å« ÃßÁ¤¿ÀÂ÷¸¦ ³»Æ÷ÇÒ ¼ö ÀÖÀ½À» ÆÄ¾ÇÇÒ ¼ö ÀÖÀ¸¸ç µû¶ó¼ À̸¦ °í·ÁÇÒ ¼ö ÀÖ´Â ¹æ¹ý, ¿¹¸¦ µé¾î ÇöÀç ´ëÀ¯¿ª¿¡ Àû¿ëµÇ°í ÀÖ´Â µî¿ì¼±¹ýÀ̳ª º» ¿¬±¸¿¡¼ »ç¿ëµÈ ÃßÁ¤À̷п¡ ±Ù°ÅÇÑ ¹æ¹ýÀÌ Àû¿ëµÇ¾î¾ß ÇÒ °ÍÀ¸·Î ÆÇ´ÜµÈ´Ù. |
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| This study evaluates the errors involved in the area average rainfall amounts estimated by the arithmetic mean method, the Thiessen's weighting method, and the optimal weighting method from the estimation theory. This study was applied to the upstream part of Nam-Han river basin (upper part of Youngwal) and the following results could be obtained. First, in case the raingauges are located evenly over the basin, no obvious difference can be found in the area average rainfall amounts from the arithmetic mean method or from the Thiessen's weighting method. However, as these two methods cannot consider the spatial variability of rainfall, the estimation error could be higher when the spatial variability of rainfall is high. In our application the estimation error from the arithmetic mean method or the Thiessen's weighting method was also found to be higher than that from the method from the information theory, which considers the spatial variability of rainfall. Thus, we could conclude that for the rainy season of Korea or for the mountain area when and where the spatial variability of rainfall is high, a proper method of considering the spatial variability of rainfall should be used regardless of the basin size. The isohyetal method generally used for the large basins or the optimal weighting method from the estimation theory used in this study could be good alternatives for this case. |
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| ¸éÀûÆò±Õ °¿ì·®;ÃßÁ¤¿ÀÂ÷;ÃÖÀû °¡ÁßÄ¡; |
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Çѱ¹¼öÀÚ¿øÇÐȸ³í¹®Áý / v.34, no.4, 2001³â, pp.317-326
Çѱ¹¼öÀÚ¿øÇÐȸ
ISSN : 1226-6280
UCI : G100:I100-KOI(KISTI1.1003/JNL.JAKO200111920731420)
¾ð¾î : Çѱ¹¾î |
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| ³í¹® Á¦°ø : KISTI Çѱ¹°úÇбâ¼úÁ¤º¸¿¬±¸¿ø |
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