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Çѱ¹¼öÀÚ¿øÇÐȸ / v.33, no.4, 2000³â, pp.407-417
¼ö¸®¸ðÇüÀ» ÀÌ¿ëÇÑ ÀÚ¿¬ÇÏõ¿¡¼­ Á¾È®»ê°è¼ö ÃßÁ¤
( An Esitimation of Lognitudinal Dispersion Coefficient in Natural Stram Using Hydraulic Model )
À±¼¼ÀÇ;ÇѰǿ¬;ÇÑÁ¤¼®;±èÁ¤¼ö; °æ±â´ëÇб³ Åä¸ñ¡¤È¯°æ°øÇкΠÅä¸ñ°øÇÐÀü°ø;°æºÏ´ëÇб³ °ø°ú´ëÇÐ Åä¸ñ°øÇаú;°æ±â´ëÇб³ ´ëÇпø Åä¸ñ°øÇаú;°æ±â´ëÇб³ ´ëÇпø Åä¸ñ°øÇаú;
 
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Áß¶ûõ ÇÏ·ùºÎ¿¡¼­ Á¾È®»ê°è¼ö¸¦ ÃßÁ¤Çϱâ À§ÇÏ¿© Áß·®Ãµ ¿ù¸ª±³ ºÎ±ÙÀÇ ±¸°£À» 1/20·Î Ãà¼ÒÇÑ Á¤»ó ¼ö¸®¸ðÇüÀ» ÀÌ¿ëÇÏ¿´´Ù. Áß¶ûõÀÇ °¥¼ö½ÃÀÇ À¯·®À» °í·ÁÇÏ¿© ½ÇÇèÀ» ½Ç½ÃÇÏ¿´À¸¸ç, ¿°·á´Â Rhodamine B¸¦ »ç¿ëÇÏ¿´´Ù. ¿°·áÀÇ ³óµµ-Àüµµµµ °î¼±À» ±¸ÇÏ¿´°í, ¼ö¸®¸ðÇü¿¡¼­ÀÇ Àüµµµµ¸¦ ÃøÁ¤ÇÏ¿© À̸¦ ³óµµ·Î È®»êÇÏ¿´´Ù. Á¾È®»ê°è¼ö¸¦ °è»êÇϱâ À§ÇÏ¿© ÃÖ´ë³óµµ¿Í ÃÖ´ë³óµµÀÇ µµ´Þ½Ã°£ °ü°è¸¦ ÀÌ¿ëÇÏ¿´´Ù. ¼ö¸®¸ðÇü ½ÇÇèÀ¸·Î ÃøÁ¤µÈ Á¾È®»ê°è¼ö¸¦ ±âÁ¸ÀÇ °æÇè½Äµé°ú ºñ±³ÇÏ¿´´Ù. Áß¶ûõ°ú ºñ±³Àû À¯»çÇÑ ¼ö¸®·® Á¶°ÇÀ» °®´Â ÇÏõ¿¡¼­ ÇöÀå ½ÇÃøÇÑ Á¾È®»ê°è¼ö °ª°ú ºñ±³ÇÏ¿´´Ù. Parker(1961)ÀÇ ½ÄÀ¸·Î »êÁ¤µÈ °ªÀº ½ÇÃøÄ¡¿¡ ºñÇØ ÀÛ°Ô »êÁ¤µÇ¾ú°í, Liu(1977) ¹× Iwasa¿Í Aya(1991)ÀÇ ½ÄÀ¸·Î »êÁ¤µÈ °ªÀº Å©°Ô »êÁ¤µÇ¾úÀ¸¸ç, McQuivey¿Í Keefer(1974), Fischer(1975), Magazine µî(1988) ¹× Seo¿Í Cheng(1988)ÀÇ ½ÄÀ¸·Î »êÁ¤µÈ °ªÀº ºñ±³Àû ±Ù»çÇÑ °ªÀ» º¸À̰í ÀÖ¾ú´Ù. ¶ÇÇÑ ½ÇÃøÄ¡´Â ÇöÀå ½ÇÃø°ª°úµµ ºñ±³Àû ±Ù»çÇÑ °ªÀ» ³ªÅ¸³»°í ÀÌ . Áß¶ûõÀÇ Á¾È®»ê°è¼ö´Â $10 extrm{m}^2/s$Á¤µµ·Î ÃßÁ¤µÈ´Ù.·Î ÃßÁ¤µÈ´Ù.
To estimate the longitudinal dispersion coefficient at the downstream of Jungrang-River, the undistorted 1/20 scale hydraulic model was used in this study. Experiments were conducted for dry season discharge, and Rhodamine B was used as a tracer. The relationship curve between concentration and conductivity of Rhodamine B was otained by laboratory test, and the conductivity which was measured in hydraulic model was converted to concentration using this curve. The longitudinal dispersion coefficient was calculated using the relationship between the peak concentration and the time to peak concentration. The results of this study were compared with the calculated values by the empirical equations for the longitudinal dispersion coefficient and with the field data. The results of comparison show that Parker's equation underestimates, and Liu'g equation and Iwasa and Aya's one overestimate, and McQuivey and Keefer's equations, Fischer's one, Magazine's one, and Seo and Cheong's one predict relatively well. The measured data sets were relatively close to the observed ones in natural river. The longitudinal dispersion coefficient at the downstream of Jungrang-River was estimated $10 extrm{m}^2/s$.
 
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Á¾È®»ê°è¼ö ¼ö¸®¸ðÇü;ÃÖ´ë³óµµ;Longitudinal disperston coefficient;Hydraulic model;Peak concentration;
 
Çѱ¹¼öÀÚ¿øÇÐȸ³í¹®Áý / v.33, no.4, 2000³â, pp.407-417
Çѱ¹¼öÀÚ¿øÇÐȸ
ISSN : 1226-6280
UCI : G100:I100-KOI(KISTI1.1003/JNL.JAKO200011920063773)
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