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Çѱ¹¼öÀÚ¿øÇÐȸ / v.34, no.4, 2001³â, pp.289-301
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( Dispersion of Nonconservative Contaminants Accidentally Released into Natural Streams )
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ºñº¸Á¸¼º ¿À¿°¹°ÁúÀÇ Á¾È®»ê¿¡ °üÇÑ ´Ü°èºÐ¸® À¯ÇÑÂ÷ºÐ ¸ðÇüÀ» ³«µ¿°­¿¡ Àû¿ëÇÏ¿©, 1991³â¿¡ ¹ß»ýÇÑ Æä³î´©Ãâ »ç°í¿¡ µû¸¥ Á¾È®»ê ¸ðÀǰè»êÀ» ¼öÇàÇÏ¿´´Ù. PreissmannÀÇ 4Á¡ À½Çعý¿¡ ±Ù°ÅÇÑ ºÎÁ¤·ù °è»ê¸ðÇüÀ¸·ÎºÎÅÍ »êÁ¤µÈ °è»ê°á°ú¸¦ Á¾È®»ê ¸ðÇüÀÇ ÀÔ·ÂÀÚ·á·Î »ç¿ëÇÏ¿´´Ù. Á¾È®»ê°è¼öÀÇ »êÁ¤À» À§ÇÑ °æÇè½Ä ¹× 1Â÷ ¹ÝÀÀÀÇ °¨¼è°è¼ö¿¡ µû¸¥ Á¾È®»ê °è»ê°á°úÀÇ ¹Î°¨µµ¸¦ ºÐ¼®ÇÏ¿´´Ù. ÇÏ·ù ÁöÁ¡¿¡¼­ÀÇ Ã·µÎ³óµµ ¹ß»ý ½Ã°¢Àº »ç¿ëµÈ Á¾È®»ê°è¼ö ½Ä¿¡ µû¶ó »ó´çÈ÷ ´Þ¶óÁüÀ» ¾Ë ¼ö ÀÖ¾ú´Ù. ¶ÇÇÑ ³óµµ ºÐÆ÷ÇüÀº °¨¼è°è¼ö¿¡ µû¶ó º¯ÇÏÁö ¾Ê´Â ¹Ý¸é, ³óµµ°ªÀº °¨¼è°è¼ö¿¡ »ó´çÈ÷ Á¿ìµÇ´Â °ÍÀ¸·Î ³ªÅ¸³µ´Ù. ÃÖÀûÈ­ ±â¹ýÀ» »ç¿ëÇÏ¿© È帧 ¸ðÇü ¹× Á¾È®»ê ¸ðÇüÀ» º¸Á¤ÇÏ¿´À¸¸ç, ³«µ¿°­¿¡ À§Ä¡ÇÑ ÁÖ¿ä Ãë¼öÁöÁ¡µé¿¡ ´ëÇÑ Ã·µÎ³óµµ ¹ß»ý½Ã°¢À» ¸ðÀÇÇÏ¿© Á¦½ÃÇÏ¿´´Ù.
A fractional step finite difference model for the longitudinal dispersion of nonconservative pollutants is applied to the Nakdong River to simulate the phenol spill accident which occurred on March, 1971. Prior to the dispersion calculation, the flow conditions are simulated to provide inputs to the dispersion model. An unsteady flow model based on Preissmann's four-point scheme is used for this purpose. Sensitivities of the dispersion calculation to empirical equations for dispersion coefficient and to the first-order decay coefficient are analyzed. The time to peak concentration at a downstream location is significantly different depending on the formula for the dispersion coefficient. Although the decay coefficient does not affect the shape of the temporal concentration distribution, the concentration values depend on the decay coefficient verb significantly. An optimization technique is used to calibrate the dispersion model as well as the flow model. The time to the peak concentration is simulated for major positions of water intake along the Nakdong River.
 
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Çѱ¹¼öÀÚ¿øÇÐȸ³í¹®Áý / v.34, no.4, 2001³â, pp.289-301
Çѱ¹¼öÀÚ¿øÇÐȸ
ISSN : 1226-6280
UCI : G100:I100-KOI(KISTI1.1003/JNL.JAKO200111920731317)
¾ð¾î : Çѱ¹¾î
³í¹® Á¦°ø : KISTI Çѱ¹°úÇбâ¼úÁ¤º¸¿¬±¸¿ø
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