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Çѱ¹¼öÀÚ¿øÇÐȸ / v.29, no.5, 1996³â, pp.139-150
¼±Çü Muskingum-Cunge ¹ý¿¡¼­ÀÇ ¼öÄ¡Àû ÀÎÀÚÀÇ º¯È­°¡ À¯ÃâÆ¯¼º¿¡ ¹ÌÄ¡´Â ¿µÇâ
( Effect of Change of Numerical Parameters on Outflow Characteristics in the Linear Muskingum-Cunge Method )
±èÁø¼ö; ÃæºÏ´ëÇб³ ³ó°ú´ëÇÐ ³ó°øÇаú;
 
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º» ³í¹®¿¡¼­´Â ¼ö¸®ÇÐÀû À¯¿ªÃßÀû ¸ðÇüÀÎ ¼±Çü Muskingum-Cunge(M-C)¹ý¿¡ À־ °ÝÀÚ°£°Ý°ú °°Àº ¼öÄ¡Àû ÀÎÀÚÀÇ º¯È­°¡ ´ÜÀ§Æø»ç¸é¿¡¼­ÀÇ À¯Ãâ¼ö¹®°î¼±¿¡ ¹ÌÄ¡´Â ¿µÇâÀ» ¼Ò°³ÇÑ´Ù. ¼öÄ¡°è»êÀÇ °á°ú¿¡ ÀÇÇϸé, À¯ÃâÆ¯¼ºÀº ¼öÄ¡Àû ¶Ç´Â ¹°¸®ÀûÀ¸·Î Àǹ̸¦ °®´Â Courant ¼ö C ¹× cell Reynolds ¼ö DÀÇ °ª¿¡ Á¿ìµÇ´Âµ¥, C °ªÀº 1¿¡ Á¢±ÙÇÒ¼ö·Ï D °ªÀº Áõ°¡ÇÒ¼ö·Ï ¼öÄ¡ºÐ»ê¿¡ ÀÇÇÑ Áøµ¿Àº ¹ß»ýÇÏ±â ¾î·Æ´Ù. C<1ÀÎ °æ¿ì´Â ¼öÄ¡Áøµ¿ÀÌ À̵¿ÆÄÀÇ Àü¹æ¿¡ ¹ß»ýÇÑ´Ù. C>1ÀÎ °æ¿ì´Â ÆÄÀÇ ÈĹ濡 ¹ß»ýÇϴµ¥, ÀÌ ¶§´Â ¼öġȮ»êÀÇ È¿°ú·Î ÀÎÇØ ¼öÄ¡Áøµ¿Àº ÀÛ¾ÆÁö°Å³ª »ç¶óÁø´Ù. Ư¼º±¸°£±æÀÌ LÀÇ °ªÀÌ ÀÛÀº »ç¸é(¿¹, ±Þ°æ»ç»ç¸é)ÀÇ °æ¿ì, M-C¹ýÀº kinematic ¹ý°ú ¸¶Âù°¡Áö·Î ÆÄÀÇ °¨¼è¸¦ º¸ÀÌÁö ¾Ê´Â´Ù. ÇÑÆí LÀÇ °ªÀÌ Å« »ç¸é(¿¹, ¿Ï°æ»ç »ç¸é)¿¡¼­´Â M-C¹ýÀº Å« °Å¸®°ÝÀÚ°£°Ý (¥Äx)¿¡¼­µµ Å« D(= L/¥ÄX)ÀÇ °ªÀ» °®°Ô µÇ¾î C¿¡ °ÅÀÇ °ü°è¾øÀÌ diffusion wave¸¦ Àß ÀçÇöÇÑ´Ù. µû¶ó¼­ ¿Ï°æ»ç À¯¿ªÀÇ ÃßÀû¿¡ ÀÖ¾î M-C ¹ýÀÇ Àû¿ëÀº ¸Å¿ì À¯È¿Çϸ®¶ó°í »ý°¢µÈ´Ù.
This paper presents the effect of numerical parameters, such as grid size and grid ratio, on the outflow hydrograph of a unit-width plane in the linear Muskingum-Cunge method. The numerical results depend on Courant number C and cell Reynolds number D, two physically and numerically meaningful parameters. As C approache 1 and D increases, the numerical dispersion-relating oscillations are difficult to occur. The numerical oscillations occur in the front of a propagating wave for C < 1, while smaller oscillations occur behind the wave for C > 1 due to the numerical diffusion effect. For a plane with a small value of characteristic reach length L (e.g., a steep plane), the numerical solution of the Muskingum-Cunge method is similar to that of the kinematic wave method, which shows no wave attenuation. However, for a plane with a large value of L (e.g., a mild plane), the Muskingum-Cunge method leads to the diffusion waves which are essentially independent of the Courant number. Accordingly, the Muskingum-Cunge method will be suited for the routing of the catchment with relatively mild slopes.
 
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Çѱ¹¼öÀÚ¿øÇÐȸÁö / v.29, no.5, 1996³â, pp.139-150
Çѱ¹¼öÀÚ¿øÇÐȸ
ISSN : 1738-9488
UCI : G100:I100-KOI(KISTI1.1003/JNL.JAKO199611920097805)
¾ð¾î : Çѱ¹¾î
³í¹® Á¦°ø : KISTI Çѱ¹°úÇбâ¼úÁ¤º¸¿¬±¸¿ø
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