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Çѱ¹¼öÀÚ¿øÇÐȸ / v.39, no.12, 2006³â, pp.985-996
¼öÀ§-À¯·®ÀÚ·á°¡ ºÎÀçÇÑ ÀÚ°¥ÇÏõÀÇ Á¶µµ°è¼ö »êÁ¤¿¡ °üÇÑ ¿¬±¸
( A Study on Roughness Coefficient Estimations in Gravel Bed Stream without Water Level-Discharge Data )
À̽ÅÀç;¹Ú»ó¿ì; ¼­³²´ëÇб³ Åä¸ñ°øÇаú;¼­³²´ëÇб³ Åä¸ñ°øÇаú;
 
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º» ¿¬±¸´Â ÀÚ°¥ÇÏõ¿¡¼­ ÇÏ»ó¿¡ ºÐÆ÷ÇÏ´Â ÀÔÀÚ¿¡ ÀÛ¿ëÇÏ´Â Àü´Ü·ÂÀ» ÀÌ¿ëÇÏ¿© µî°¡Á¶µµ¸¦ »êÁ¤ÇÒ ¼ö ÀÖ´Â ¸ðÇüÀ» °³¹ßÇÏ¿´´Ù. »êÁ¤µÈ µî°¡Á¶µµ´Â ¼öÀ§-À¯·®ÀÚ·á°¡ ºÎÀçÇÑ ÇÏõ¿¡¼­ À¯·®¿¡ ´ëÇÑ ¼öÀ§¸¦ »êÁ¤Çϰí Á¶µµ°è¼ö¸¦ »êÁ¤Çϴµ¥ ÀÌ¿ëÇÏ¿´´Ù. ´ë»óÇÏõÀº ¼¶Áø°­ÀÇ Áß ÇÏ·ùºÎÀÎ ±¸·Ê¼öÀ§Ç¥¿Í ¼ÛÁ¤¼öÀ§Ç¥ ±¸°£À¸·Î ¼±Á¤ÇÏ¿´´Ù. µî°¡Á¶µµ´Â °³¹ßµÈ ¸ðÇü¿¡ ÀÇÇØ ±¸·Ê¼öÀ§Ç¥ÁöÁ¡¿¡¼­ 0.194m°¡ »êÁ¤µÇ¾ú´Ù. »êÁ¤µÈ µî°¡Á¶µµ¸¦ È帧¸ðÇü¿¡ Àû¿ëÇÏ¿© °è»êµÈ ¼öÀ§À¯·®ÀڷḦ °üÃøµÈ ÀÚ·á¿Í ºñ±³ÇÑ °á°ú 6% À̳»ÀÇ ¿ÀÂ÷¸¦ º¸¿´´Ù. Á¶µµ°è¼ö´Â ´ë»ó±¸°£¿¡ ´ëÇØ ºÎÁ¤·ù ÇØ¼®À» ½Ç½ÃÇÏ¿© À¯·®±Ô¸ðº°·Î °è»êµÈ ¼öÀ§¿Í °üÃøµÈ ¼öÀ§¿¡ ´ëÇØ »êÁ¤ÇÏ¿´´Ù. ±× °á°ú °üÃøµÈ ¼öÀ§¿Í °è»êµÈ ¼öÀ§¿¡ ÀÇÇØ »êÁ¤µÈ Á¶µµ°è¼ö´Â $0{sim}0.002$ÀÇ ¿ÀÂ÷¸¦ º¸¿´°í, Á¶µµ°è¼öÀÇ °¡º¯¼ºµµ °í·ÁÇÒ ¼ö ÀÖ¾ú´Ù.
This study developed a model that could calculate equivalent roughness using shear stress acting on distributed grains in gravel bed stream. The estimated equivalent roughness by the model developed was used for estimation of water level and roughness coefficient in the stream without water level-discharge data. The model was applied to the Gurey-Songjeong stage station section located in the Sumjin river mid-downstream. The equivalent roughness by the model developed in this study was estimated to be 0.194m at the Gurey stage station. Calculated water level which the estimated equivalent roughness was applied to the flow model was shown ewer of within 6% in comparison with observed water level. Also, roughness coefficient was estimated using observed and calculated water level about each discharge scale by unsteady flow analysis. As a result, error of roughness coefficient estimated by observed and calculated water level was shown error of $0{sim}0.002$ and could consider variability of roughness coefficient.
 
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ÀÚ°¥ÇÏõ;µî°¡Á¶µµ;Àü´Ü·Â;Á¶µµ°è¼ö;gravel bed stream;equivalent roughness;shear stress;roughness coefficient;
 
Çѱ¹¼öÀÚ¿øÇÐȸ³í¹®Áý / v.39, no.12, 2006³â, pp.985-996
Çѱ¹¼öÀÚ¿øÇÐȸ
ISSN : 1226-6280
UCI : G100:I100-KOI(KISTI1.1003/JNL.JAKO200606141782178)
¾ð¾î : Çѱ¹¾î
³í¹® Á¦°ø : KISTI Çѱ¹°úÇбâ¼úÁ¤º¸¿¬±¸¿ø
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