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Çѱ¹¼öÀÚ¿øÇÐȸ / v.41, no.5, 2008³â, pp.473-482
»õ¸¸±Ý ÀΰøÈ£ Á¡Âø¼º ÅðÀû¹°ÀÇ Ä§½ÄƯ¼º¿¡ ´ëÇÑ ½ÇÇèÀû ¿¬±¸
( A Laboratory Study on Erosional Properties of Fine Cohesive Sediments from Saemankeum Artificial Lake )
Ȳ±Ô³²;±èÇö¹Î;¾ÈÀÍÀå; ÀüºÏ´ëÇб³ °ø°ú´ëÇÐ Åä¸ñ°øÇаú;ÀüºÏ´ëÇб³ ´ëÇпø Åä¸ñ°øÇаú;(ÁÖ)ÇýÀÎ ÀÌ¿£¾¾;
 
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º» ¿¬±¸ÀÇ ¸ñÀûÀº ÃÖ±Ù ³¡¸·ÀÌ °ø»ç°¡ ¿Ï·áµÈ »õ¸¸±Ý ÀΰøÈ£ Á¡Âø¼º ÅðÀû¹°ÀÇ Ä§½ÄƯ¼ºÀ» Á¤·®ÀûÀ¸·Î ºÐ¼®ÇÏ´Â °ÍÀÌ´Ù. ħ½Ä½ÇÇèÀº ±¹³» ÃÖÃÊ·Î Á¦ÀÛµÇ°í ±× Å¸´ç¼ºÀÌ °ËÁõµÈ ÀüºÏ´ë ȯÇü¼öÁ¶¸¦ ÀÌ¿ëÇÏ¿© °¢±â ´Ù¸¥ ¹Ðµµ¸¦ °®´Â ±ÕÀÏÀú¸é Á¶°ÇÇÏ¿¡¼­ ¼öÇàµÇ¾úÀ¸¸ç, »õ¸¸±Ý ÀΰøÈ£ Á¡Âø¼º ÅðÀû¹°ÀÇ Ä§½ÄÇѰèÀü´ÜÀÀ·Â ¹× ħ½Ä·ü°è¼ö°¡ Á¤·®ÀûÀ¸·Î »êÁ¤µÇ¾ú´Ù. ÇÑÆí, ÀϹÝÀûÀ¸·Î Á¡Âø¼º ÅðÀû¹°ÀÇ Ä§½ÄƯ¼ºÀº ÅðÀû¹°ÀÇ ¹°¸®.È­ÇÐÀû ±âº»Æ¯¼º¿¡ µû¶ó Å©°Ô º¯È­ÇϹǷÎ, »õ¸¸±Ý ÀΰøÈ£ Á¡Âø¼º ÅðÀû¹°ÀÇ ÀÌ·¯ÇÑ Æ¯¼º ¶ÇÇÑ Á¶»çµÇ¾úÀ¸¸ç, ÀÌ¿Í ¿¬°èÇÏ¿© ħ½ÄƯ¼ºÀÌ ÇØ¼®µÇ¾ú´Ù. »õ¸¸±Ý ÀΰøÈ£ Á¡Âø¼º ÅðÀû¹°ÀÇ °æ¿ì¿¡, Àú¸é¹Ðµµ $1.17{sim}1.34g/cm^3$ ¹üÀ§¿¡¼­ ħ½ÄÇѰèÀü´ÜÀÀ·ÂÀº $0.26{sim}0.52N/m^2$·Î ·Î±×ÇÔ¼öÀûÀ¸·Î Áõ°¡ÇÏ¿´À¸¸ç, ħ½Ä·ü°è¼ö´Â $14.28{sim}6.02mg/cm^2;hr$ ¹üÀ§·Î Áö¼öÇÔ¼öÀûÀ¸·Î °¨¼ÒÇÏ¿´´Ù. »êÁ¤µÈ ħ½Ä ¸Å°³º¯¼öµéÀº Ÿ Áö¿ª Á¡Âø¼º ÅðÀû¹°°ú ¶ÇÇÑ ºñ±³/ºÐ¼®µÇ¾úÀ¸¸ç, ±× °ªÀº Á¤·®ÀûÀ¸·Î Áö¿ª¸¶´Ù Å©°Ô ´Ù¸¥ °ÍÀ¸·Î ³ªÅ¸³µ´Ù. ƯÈ÷ »õ¸¸±Ý ÀΰøÈ£ Á¡Âø¼º ÅðÀû¹°ÀÇ Ä§½ÄÇѰèÀü´ÜÀÀ·ÂÀº ±º»êÇØ¿ª ÅðÀû¹°º¸´Ù´Â Å©¸ç, ½ÃÈ­È£ ÅðÀû¹°°ú´Â À¯»çÇÑ °ÍÀ¸·Î ³ªÅ¸³µÀ¸¸ç, ¹Ý¸é¿¡ »õ¸¸±Ý ÀΰøÈ£ ÅðÀû¹°ÀÇ Ä§½Ä·ü°è¼ö´Â ±º»êÇØ¿ª ÅðÀû¹°º¸´Ù´Â ÀÛÀº °ÍÀ¸·Î ³ªÅ¸³µ´Ù.
The purpose of this study is to quantitatively estimate the erosional properties for cohesive sediment from Saemankeum artificial lake. A series of erosion tests were conducted with Chonbuk annular flume, which is the first one constructed in this country and verified with validities. Each erosion tests were conducted under a uniform bed condition but a different bed density respectively, and its critical shear stress for erosion(${ au}_{ce}$) as well as the erosion rate coefficient (${varepsilon}_M$) were determined quantitatively. Since the erosional properties of the cohesive sediments vary largely depending in the physico-chemical properties, such properties of Saemankeum sediments were also estimated and their effects on the erosional properties were analyzed. For Saemankeum sediments, it can be seen that ${ au}_{ce}$ increases from $0.26N/m^2$ to $0.52N/m^2$ and ${varepsilon}_M$ decreases exponentially from $14.28mg/cm^2;hr$ to $6.02mg/cm^2;hr$, as the bed density varies from $1.17g/cm^3$ to $1.34g/cm^3$. The erosional parameters of Saemankeum sediments are found to be remarkably different in quantity as compared with those for cohesive sediments from other sites. Particularly, ${ au}_{ce}$ for Saemankeum sediments is known to be larger than that of Kunsan sediments but similar with that of Shihwa sediments, while ${varepsilon}_M$ for Saemankeum sediments is shown to be smaller than that for Kunsan sediments.
 
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Á¡Âø¼º ÅðÀû¹°;ħ½Ä;¹°¸®.È­ÇÐÀû Ư¼º;ȯÇü¼öÁ¶;ħ½ÄÇѰèÀü´ÜÀÀ·Â;ħ½Ä·ü°è¼ö;cohesive sediments;erosion;physico-chemical properties;annular flume;critical shear stress for erosion;erosion rate coefficient;
 
Çѱ¹¼öÀÚ¿øÇÐȸ³í¹®Áý / v.41, no.5, 2008³â, pp.473-482
Çѱ¹¼öÀÚ¿øÇÐȸ
ISSN : 1226-6280
UCI : G100:I100-KOI(KISTI1.1003/JNL.JAKO200816863296511)
¾ð¾î : Çѱ¹¾î
³í¹® Á¦°ø : KISTI Çѱ¹°úÇбâ¼úÁ¤º¸¿¬±¸¿ø
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