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Çѱ¹¼öÀÚ¿øÇÐȸ / v.28, no.3, 1995³â, pp.205-216
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Á¾È®»ê°è¼ö¿¡ °üÇÑ ¿¬±¸ : I. ±âÁ¸ Á¾È®»ê°è¼ö ÃßÁ¤½Ä ºñ±³
( Analysis of Longitudinal Dispersion Coefficient : Part I. Comparative Study of Existing Equations for Dispersion Coefficient ) |
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| ÀÚ¿¬ÇÏõÀÇ Á¾È®»ê°úÁ¤À» Á¤È®ÇÏ°Ô ´ëÇ¥ÇÏ´Â Á¾È®»ê°è¼öÀÇ ¼±Á¤À» À§ÇÏ¿© ±â Á¦¾ÈµÈ Á¾È®»ê°è¼ö ÃßÁ¤°ø½ÄµéÀ» ºñ±³ ºÐ¼®ÇÏ¿´´Ù. Á¾È®»ê°è¼ö °ø½Ä Áß Àû¿ë¼ºÀÌ ºñ±³Àû ¿ì¼öÇÑ °ø½ÄÀ» ¼±Á¤ÇÏ¿© ¹Ì±¹ ¾ð¿ªÀÇ 26°³ ÇÏõ¿¡¼ ¼öÁýµÈ ½ÇÃøÄ¡¿Í ºñ±³ÇÏ¿´´Ù. º» ¿¬±¸¿¡¼ ¹àÇôÁø »ç½ÇÀº ´ÙÀ½°ú °°´Ù. Elder°ø½ÄÀº Á¾È®»ê°è¼ö¸¦ »ó´çÈ÷ °ú¼Ò »êÁ¤Çϱ⠶§¹®¿¡ 1Â÷¿ø È®»ê¸ðÇüÀÇ Á¾È®»ê°è¼öÀÇ »êÁ¤¿¡´Â ºÎÀûÇÕÇÏ´Ù. McQuivey¿Í Keefer°ø½ÄÀº ÀüüÀûÀ¸·Î °ú´ë »êÁ¤ÇÏ´Â ÆíÀ̰í, Magazine µî °ø½ÄÀº ´ëºÎºÐÀÇ °æ¿ì¿¡ °ú¼Ò »êÁ¤Çϰí ÀÖ´Ù. À̵鿡 ºñÇØ Iwasa¿Í Aya°ø½ÄÀº ºñ±³Àû ¾çÈ£ÇÑ °Åµ¿À» º¸À̰í ÀÖ´Ù. Fischer°ø½ÄÀº ÀüüÀûÀ¸·Î °ú´ë »êÁ¤Çϰí ÀÖÀ¸³ª, Liu°ø½ÄÀº ¾çÈ£ÇÑ °Åµ¿À» º¸À̰í ÀÖÀ¸¸ç ƯÈ÷ Á¤È®µµ ¸é¿¡¼´Â °¡Àå ¿ì¼öÇÑ °ÍÀ¸·Î ³ªÅ¸³µ´Ù. ±×·¯³ª Liu°ø½ÄÀº ÇÏÆøÀÇ Á¦°ö ÇüŸ¦ Æ÷ÇÔÇϰí Àֱ⠶§¹®¿¡ ÇÏõÀÇ ÆøÀÌ Å« ´ëÇÏõÀÇ °æ¿ì Á¾È®»ê°è¼ö¸¦ °ú´ë »êÁ¤Çϰí ÀÖ´Ù. µû¶ó¼ ÇÏÆøÀÌ Å« ´ëÇÏõ(200m ÀÌ»ó)ÀÇ °æ¿ì¿¡´Â Liu°ø½ÄÀÇ »ç¿ëÀ» ÇÇÇÏ´Â °ÍÀÌ ¹Ù¶÷Á÷ÇÑ °ÍÀ¸·Î »ç·áµÈ´Ù. |
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| Existing equations for dispersion coefficient are analyzed in depth to select proper dispersion coefficient which can represent dispersion characteristics of natural streams. Several equations are tested with measured data which were collected in 26 streams in the United States. Findings of this study are as follows. Elder's equation should not be used to estimate dispersion coefficient of the one-dimensional dispersion model because it underestimates significantly. McQuivey and Keefer's equation is overestimating, whereas Magazine et al.'s equation is underestimating. However, Iwasa and Aya's equation predicts relatively well. Fischer's equation is generally overestimating. Liu's equation predicts quite well. The performance of Liu's equation is the best of all especially in terms of accuracy. However, Liu's equation is generally overestimating in case of large river because the square of channel width is included in the equation. Therefore, it is recommended not to use Liu's equation in case of large rivers, especially rivers of which channel width is larger than 200m. |
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Çѱ¹¼öÀÚ¿øÇÐȸÁö / v.28, no.3, 1995³â, pp.205-216
Çѱ¹¼öÀÚ¿øÇÐȸ
ISSN : 1738-9488
UCI : G100:I100-KOI(KISTI1.1003/JNL.JAKO199511920095819)
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| ³í¹® Á¦°ø : KISTI Çѱ¹°úÇбâ¼úÁ¤º¸¿¬±¸¿ø |
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