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Çѱ¹¼öÀÚ¿øÇÐȸ / v.43, no.6, 2010³â, pp.517-524
º¹´Ü¸é °³¼ö·ÎÈ帧¿¡¼­ È«¼öÅÍ ½Ä»ýÀÇ È帧ÀúÇ×À» ¹Ý¿µÇÑ 1Â÷¿ø ¸ðÇü
( One-Dimensional Model for Flow Resistance of Floodplain Vegetation in Compound Open-Channel Flow )
¹Ú¹®Çü; Çѱ¹°Ç¼³±â¼ú¿¬±¸¿ø ÇÏõ. ÇØ¾ÈÇ׸¸¿¬±¸½Ç;
 
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º» ¿¬±¸¿¡¼­´Â ½Ä»ýÀÌ Æ÷¼³µÈ È«¼öÅ͸¦ Æ÷ÇÔÇÏ´Â º¹´Ü¸é °³¼ö·Î È帧ÀÇ ¼öÀ§¸¦ ¿¹ÃøÇϱâ À§ÇÏ¿© À¯È¿ Àü´ÜÀÀ·Â±â¹ý¿¡ ±Ù°ÅÇÑ ÀÏÂ÷¿ø ¸ðÇüÀ» Á¦½ÃÇÏ¿´´Ù. Á¦¾ÈµÈ ¸ðÇüÀº ÁÖ¼ö·Î¿Í È«¼öÅÍ Á¢Çպο¡¼­ ¹ß»ýÇÏ´Â ¿îµ¿·® ±³È¯È¿°ú¸¦ ¿ÍÁ¡¼º°è¼ö °³³äÀ» ÀÌ¿ëÇÏ¿© ¹Ý¿µÇÒ ¼ö ÀÖ´Ù. ÁÖ¼ö·Î¿Í È«¼öÅÍÀÇ °æ°è¿¡¼­ ¹ß»ýÇÏ´Â °æ°è¿ÍÁ¡¼º°è¼ö´Â 3Â÷¿ø ·¹À̳îÁî ÀÀ·Â ¸ðÇüÀ» ÀÌ¿ëÇÏ¿© °áÁ¤ÇÏ¿´´Ù. °æ°è¿ÍÁ¡¼º°è¼öÀÇ ¿µÇâÀ» ÆÄ¾ÇÇϱâ À§ÇÏ¿© ¹Î°¨µµºÐ¼®À» ¼öÇàÇÏ¿´´Ù. °æ°è¿ÍÁ¡¼º°è¼öÀÇ º¯È­¿¡ ´ëÇÏ¿© ¹è¼ö°î¼±ÀÇ º¯È­´Â Å©Áö ¾Ê¾ÒÀ¸³ª, È«¼öÅÍ¿¡¼­ ºÎ´ãÇÏ´Â À¯·®Àº °æ°è¿ÍÁ¡¼º°è¼ö¿¡ ºñ·ÊÇÏ¿© Áõ°¡ÇÏ¿´´Ù. ¸¶Áö¸·À¸·Î ½Ä»ýµÈ È«¼öÅÍÀÇ ½Ä»ý¹Ðµµ ¹× ħ¼öºñ¿¡ µû¸¥ °æ°è¿ÍÁ¡¼º°è¼öÀÇ º¯È­¸¦ »ìÆìº¸¾Ò´Ù. °è»êµÈ °æ°è¿ÍÁ¡¼º°è¼ö´Â ½Ä»ý¹Ðµµ¿Í ħ¼öºñ¿¡ ºñ·ÊÇϸç, ´ë·«$(2-5){ imes};10^{-4}$ Á¤µµÀÇ °ªÀ» °®´Â °ÍÀ¸·Î ³ªÅ¸³µ´Ù.
In this study, the 1D apparent shear stress model for vegetated compound open-channel flows was suggested. To consider the effect of momentum exchange between main channel and floodplain, the eddy viscosity concept was used in the present model. The interfacial eddy viscosity in the interface of main channel and floodplain was determined from the 3D Reynolds stress model. The evaluated interfacial eddy viscosity appears to be good agreement with those proposed previously. To investigate the effect of interfacial eddy viscosity, sensitive analysis was carried out. the computed backwater profiles are nearly identical with respect to the value of the interfacial eddy viscosity. However, the discharge conveyed by the floodplain changes is proportional to the interfacial eddy viscosity. Finally, the changes of the interfacial eddy viscosity due to the vegetation density and vegetation height were examined. The computed results of interfacial eddy viscosity are in proportion to the vegetation density and vegetation height, and the interfacial eddy viscosity has a range of $(2-5);{ imes};10^{-4}$.
 
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º¹´Ü¸é °³¼ö·Î È帧;È«¼öÅÍ ½Ä»ý;¿îµ¿·® ±³È¯;À¯È¿ Àü´ÜÀÀ·Â;°æ°è¿ÍÁ¡¼º°è¼ö;compound open-channel flows;floodplain vegetation;momentum exchange;apparent shear stress;interfacial eddy viscosity;
 
Çѱ¹¼öÀÚ¿øÇÐȸ³í¹®Áý / v.43, no.6, 2010³â, pp.517-524
Çѱ¹¼öÀÚ¿øÇÐȸ
ISSN : 1226-6280
UCI : G100:I100-KOI(KISTI1.1003/JNL.JAKO201020065114607)
¾ð¾î : Çѱ¹¾î
³í¹® Á¦°ø : KISTI Çѱ¹°úÇбâ¼úÁ¤º¸¿¬±¸¿ø
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