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Çѱ¹¼öÀÚ¿øÇÐȸ / v.30, no.5, 1997³â, pp.549-559
ÇѰ­ º»·ù¿¡ ´ëÇÑ ºÎÁ¤·ù °è»ê¸ðÇü : ¸ðÇüÀÇ º¸Á¤
( Unsteady Flow Model for the Main Reach of the Han River : Calibration )
ȲÀÇÁØ;Àü°æ¼ö; Çö´ë¿£Áö´Ï¾î¸µ Åä°Ç»ç¾÷º»ºÎ ¼öÀÚ¿ø°³¹ßºÎ;¼º±Õ°ü´ëÇб³ °ø°ú´ëÇÐ Åä¸ñ°øÇаú;
 
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ÇѰ­ º»·ù±¸°£¿¡ ´ëÇÑ ÆóÇÕÇü ºÎÁ¤·ù °è»ê¸ðÇüÀ» ¼ö¸³ÇÏ¿´´Ù. ¼ö¸³µÈ ¸ðÇüÀº °¡º¯ ¸Å°³º¯¼ö ¸ðÇüÀ¸·Î¼­ °ø°£Àû À§Ä¡ ¹× À¯·® °ª¿¡ µû¶ó °¢ °è»êÁ¡¸¶´Ù Á¶µµ°è¼öÀÇ °ªÀÌ ´Þ¸® ÁÖ¾îÁú ¼ö ÀÖµµ·Ï ÇÏ¿´´Ù. Á¶µµ°è¼ö ¹× ¿ù·ù À¯·®°è¼ö¿¡ °üÇÑ ¸ðÇüµµ ¹Î°¨µµ ºÐ¼®À» ¼öÇàÇÏ¿´À¸¸ç, ±× °á°ú·Î Manning Á¶µµ°è¼ö¸¦ ÃßÁ¤ ´ë»ó ¸Å°³º¯¼ö·Î ¼±Á¤ÇÏ¿´´Ù. °ú°Å È«¼ö»ç»óµé¿¡ ´ëÇÑ °üÃøÀڷḦ ÀÌ¿ëÇÏ¿© ¸ðÇüÀÇ º¸Á¤ ¹× °ËÁõÀ» ¼öÇàÇÏ¿´´Ù. Á¶µµ°è¼öÀÇ ÃÖÀû ÃßÁ¤ ¹æ¹ýÀ¸·Î´Â ¼öÁ¤ Gauss-Newton ¹æ¹ýÀ» »ç¿ëÇÏ¿´´Ù. °¡º¯ ¸Å°³º¯¼ö ¸ðÇüÀÇ º¸Á¤ °á°ú, Á¶µµ°è¼öÀÇ °ø°£Àû º¯µ¿¼º ¹× À¯·®¿¡ µû¸¥ º¯È­ °æÇâÀÌ ºÐ¸íÈ÷ ³ªÅ¸³µ´Ù. Áï, ¿Õ¼÷õ À¯ÀÔÁöÁ¡ »ó·ù±¸°£¿¡ ´ëÇÑ Á¶µµ°è¼ö°¡ ÇÏ·ù ±¸°£¿¡ ºñÇÏ¿© Å©°í, À¯·®ÀÌ Áõ°¡ÇÔ¿¡ µû¶ó Á¶µµ°è¼ö´Â °¨¼ÒÇÏ´Â °ÍÀ¸·Î ³ªÅ¸³µ´Ù. °¡º¯ ¸Å°³º¯¼ö ¸ðÇüÀ» »ç¿ëÇÑ °è»ê°á°ú°¡ ´ÜÀÏ ¸Å°³º¯¼ö¸¦ »ç¿ëÇÏ´Â Á¾·¡ÀÇ ¸ðÇüÀ» »ç¿ëÇÏ´Â °æ¿ìº¸´Ù °üÃø¼öÀ§¿Í ´õ¿í Àß ÀÏÄ¡ÇÔÀÌ ¸ðÇüÀÇ °ËÁõÀ» ÅëÇÏ¿© ÀÔÁõµÇ¾ú´Ù. ¶ÇÇÑ Á¶µµ°è¼öÀÇ °ø°£Àû º¯È­°¡ À¯·®¿¡ µû¸¥ º¯µ¿º¸´Ù ´õ ½ÉÇÑ °ÍÀ¸·Î µå·¯³µ´Ù.
A multiply-connected network unsteady flow model for the main reach of the Han River is developed. It is a variable parameter model which allows variable roughness coefficient for each computational point according to the spatial position and the value of discharge. Sensitivities of the model to roughness coefficient and weir-flow discharge coefficient are tested, and as a result Manning's roughness coefficient is selected as the calibration parameter. The model is calibrated and verified using the records of the past flood events. A modified Gauss-Newton method is used for the optimal calibration of roughness coefficients. From the calibration of variable parameter model, spatial variation and discharge dependence of Manning's roughness coefficient are identified. That is, the roughness coefficient is higher for the upstream reach of the Wangsook stream Junction, and it decreases as the discharge increases. It turns out through the verification that the stages calculated by the variable parameter model agree better with the observed than those by the conventional single parameter model. Spatial variation of the roughness coefficient appears to be more significant than the dependence of the discharge
 
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Çѱ¹¼öÀÚ¿øÇÐȸ³í¹®Áý / v.30, no.5, 1997³â, pp.549-559
Çѱ¹¼öÀÚ¿øÇÐȸ
ISSN : 1226-6280
UCI : G100:I100-KOI(KISTI1.1003/JNL.JAKO199711920100505)
¾ð¾î : Çѱ¹¾î
³í¹® Á¦°ø : KISTI Çѱ¹°úÇбâ¼úÁ¤º¸¿¬±¸¿ø
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