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Çѱ¹¼öÀÚ¿øÇÐȸ / v.37, no.12, 2004³â, pp.1055-1063
°¡º¯ Á¶µµ°è¼ö ºÎÁ¤·ù °è»ê¸ðÇü
( Unsteady Flow Model with Variable Roughness Coefficient )
±èÇÑÁØ;Àü°æ¼ö; (ÁÖ)À¯½Å ÄÚÆÛ·¹ÀÌ¼Ç ¼öÀÚ¿øºÎ;¼º±Õ°ü´ëÇб³ Åä¸ñȯ°æ°øÇаú;
 
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An unsteady flow model is developed that allows variable roughness coefficient for each computational point according to its spatial position and the discharge. A step function or a power function can be used for functional relation between the discharge and the Manning's roughness coefficient. The model is applied to the reach of the South Han River between the Chungju Dam and Paldang Dam, and model parameters are estimated by optimization. Estimated parameters of both the step function model and the Power function model show that Manning's roughness coefficient decreases as the discharge increases. This tendency is more noticeable for the upstream reach of Yeoju compared to the downstream reach. It turns out that the stages calculated by the variable roughness coefficient model agree better with the observed ones than those by the conventional fixed parameter model.
 
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ºÎÁ¤·ù °è»ê¸ðÇü;°¡º¯ Á¶µµ°è¼ö;ÃÖÀû ÃßÁ¤;³²ÇѰ­;unsteady flow model;variable roughness coefficient;optimal estimation;South Han River;
 
Çѱ¹¼öÀÚ¿øÇÐȸ³í¹®Áý / v.37, no.12, 2004³â, pp.1055-1063
Çѱ¹¼öÀÚ¿øÇÐȸ
ISSN : 1226-6280
UCI : G100:I100-KOI(KISTI1.1003/JNL.JAKO200414714216908)
¾ð¾î : Çѱ¹¾î
³í¹® Á¦°ø : KISTI Çѱ¹°úÇбâ¼úÁ¤º¸¿¬±¸¿ø
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