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Çѱ¹ÇÏõȣ¼öÇÐȸ / v.44, no.1, 2011³â, pp.58-65
Á¡Âø¼º À¯»çÀÇ Ä§°­¼Óµµ, Å©±â, ¹Ðµµ ÃøÁ¤ Ç÷¢Å» Â÷¿ø ºÐ¼®
( Measurement of Settling Velocity, Size and Density and Analysis of Fractal Dimension of Cohesive sediment )
¼Õ¹Î¿ì; ÀÎÇÏ´ëÇб³ ÀÚ¿¬°úÇдëÇÐ;
 
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º» ¿¬±¸´Â °£´ÜÇÑ ½ÇÇè½Ç ½ÇÇèÀ» ÅëÇÏ¿© Á¡Âø¼º À¯»çÀÇ µ¢¾î¸®ÀÎ Ç÷°ÀÇ Ä§°­¼Óµµ¸¦ ÃøÁ¤Çϰí À̸¦ ÀÌ¿ëÇÏ¿© Ç÷°ÀÇ ¹Ðµµ¿Í ÇÁ·¢Å» Â÷¿øÀ» °áÁ¤ÇÏ´Â °ÍÀÌ ¸ñÀûÀÌ´Ù. À̸¦ À§ÇÏ¿© »ó¾÷¿ë °íÇØ»óµµ Ä«¸Þ¶ó¸¦ ÀÌ¿ëÇÏ¿© Ç÷°ÀÌ Ä§°­µÇ´Â ¸ð½ÀÀ» ÃÔ¿µÇÏ¿´°í, ÀÌÈÄ À̹ÌÁö ºÐ¼®À» ÅëÇØ Ç÷°ÀÇ Ä§°­¼Óµµ¸¦ °áÁ¤ÇÏ¿´´Ù. º» ¿¬±¸¸¦ ÅëÇØ À¯±â¹°ÀÇ ¸¹ÀÌ Æ÷ÇÔµÈ Lake Apopka Á¤Âø¼º À¯»ç´Â Ç÷°ÀÇ Å©±â¿Í ħ°­¼Óµµ°¡ ºñ·ÊÇÏ´Â °ü°è¸¦ °¡Áö´Â °Í¿¡ ºñÇØ ¹«±âÁúÀÎ Ä«¿Ã¸®³ªÀÌÆ®´Â ¹Ýºñ·ÊÇϰųª °ÅÀÇ »ó°ü¼ºÀ» °¡ÁöÁö ¾Ê´Â °ÍÀÌ È®ÀεǾú´Ù. Ç÷° ¹ÐµµÀÇ °æ¿ì Lake Apopka´Â °ÅÀÇ ÀÏÁ¤ÇÑ µ¥ ºñÇØ Ä«¿Ã¸®³ªÀÌÆ®´Â Ç÷°ÀÇ Å©±â Áõ°¡¿¡ ¹Ýºñ·ÊÇÏ¿© ¹Ðµµ°¡ °¨¼ÒÇÏ´Â °æÇâÀÌ È®ÀεǾú°í ÇÁ·¢Å» Â÷¿øµµ À¯»çÇÑ °ü°è¸¦ °¡Áö´Â °ÍÀ¸·Î ÆÇ´ÜµÈ´Ù. Lake Apopka Á¡Âø¼º À¯»ç¿Í Ä«¿Ã¸®³ªÀÌÆ® »çÀÌ¿¡¼­ ³ªÅ¸³ª´Â ÀÌ·¯ÇÑ Â÷ÀÌÁ¡Àº À¯±â¹° ÇÔÀ¯¿¡ µû¶ó ÀÚ±âÀ¯»ç¼º¿Ã °¡Áö´Â ÇÁ·¢Å» ±¸Á¶Ã¼¸¦ ±¸¼ºÇÏ´ÂÁö ¿©ºÎ¿¡ µû¸¥ °ÍÀ¸·Î ÀÌÇØµÈ´Ù. Áï ÇÁ·¢Å» ÀÌ·ÐÀ» µû¸£´Â Ä«¿Ã¸®³ªÀÌÆ®ÀÇ °æ¿ì´Â Ç÷°ÀÇ Å©±â°¡ Áõ°¡ÇÏ´Â µ¿½Ã¿¡ ¹Ðµµ°¡ °¨¼ÒÇÏ¿© ¹Ýºñ·Ê °ü°è¸¦ º¸ÀÌ´Â ¹Ý¸é Lake ApopkaÀÇ À¯±âÁú Á¡Âø¼º À¯»ç´Â ÀÌ·¯ÇÑ °æÇ⼺À» ¶ìÁö ¾Ê´Â °ÍÀ¸·Î ÆÇ´ÜµÈ´Ù. ±×¸®°í ÀÌ °æÇ⼺¿¡ µû¶ó Ç÷°ÀÇ Å©±â°¡ Áõ°¡ÇÔ¿¡ µû¶ó ¹Ðµµ°¡ °¨¼ÒÇÏ´Â Ä«¿Ã¸®³ªÀÌÆ®ÀÇ Ä§°­¼Óµµ¿¡ ºñÇØ Ç÷°ÀÇ Å©±â Áõ°¡ÇÒ ¶§ ÀÏÁ¤ÇÑ ¹Ðµµ°¡ À¯ÁöµÇ´Â Lake ApopkaÀÇ Á¡Âø¼º À¯»ç°¡ ħ°­¼Óµµ¿Í Ç÷° Å©±â »çÀÌÀÇ »ó°ü°ü°è¸¦ °¡Áö´Â °ÍÀ¸·Î °í·ÁµÈ´Ù. ÀÌ·¯ÇÑ Ä§°­¼Óµµ¿Í À¯»ç Å©±â »çÀÌÀÇ »ó°ü°ü°è¸¦ ÅëÇØ¼­ °í·ÉÅä µîÀÇ ¹«±âÁú Á¡Âø¼º À¯»ç°¡ Áö¹èÀûÀÎ ÀÚ¿¬È¯°æ¿¡¼­´Â ¸ð·¡ µîÀÇ ºñÁ¡Âø¼º À¯»çÀÇ °æ¿ì¿Í ´Ù¸¥ °üÁ¡¿¡¼­ ħ°­¼Óµµ¸¦ °í·ÁÇϰí ÀÌ Æ¯¼ºÀÌ À¯»çÀÇ ÀÌ¼Û ¹× È®»ê¿¡ ¹ÌÄ¡´Â ¿µÇâÀ» ÆÇ´ÜÇÒ Çʿ䰡 ÀÖ´Â »ç½ÇÀ» ¾Ë ¼ö ÀÖ´Ù.
This study aims to investigate the settling velocity of aggregates of cohesive sediment (floc) and its relationship with sediment size, density and fractal dimension. A system of commercial camera and macro-lens is used for the experiment. Through the image-analysis technique, the image taken by the camera system is analyzed. For the experiment, kaolinite and a natural sediment sampled at Lake Apopka in Florida have been tested. From this study, it is known that kaolinite and Lake Apopka sediments show different behaviors mainly depending on the organic matter content. Samples of kaolinite with less organic contents show a more definite trend to follow a fractal theory and relatively strong relationships between the settling velocity, density, fractal dimension and floc size compared to the Lake Apopka sediments rich in organics.
 
Ű¿öµå
cohesive sediment;floc;settling velocity;fractal dimension;
 
Çѱ¹ÇÏõȣ¼öÇÐȸÁö / v.44, no.1, 2011³â, pp.58-65
Çѱ¹ÇÏõȣ¼öÇÐȸ
ISSN : 1976-8087
UCI : G100:I100-KOI(KISTI1.1003/JNL.JAKO201118565335341)
¾ð¾î : Çѱ¹¾î
³í¹® Á¦°ø : KISTI Çѱ¹°úÇбâ¼úÁ¤º¸¿¬±¸¿ø
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