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Çѱ¹ÇÏõȣ¼öÇÐȸ / v.36, no.2, 2003³â, pp.48-161
µµ½ÉÀÇ ¾èÀº ÀΰøÈ£ÀÎ Àϰ¨È£ÀÇ ¼öÁúº¯È­Æ¯¼º°ú ÅðÀûȯ°æÀÇ Æò°¡
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º» ¿¬±¸´Â µµ½É¿¡ À§Ä¡ÇÑ ¾èÀº ÀΰøÈ£¼öÀÇ ¼öÁúº¯È­ Ư¼º, Á¦ÇÑ¿µ¾ç¿° ¹× ÅðÀû¹° Ư¼ºÀ» Æò°¡Çϱâ À§Çؼ­ ÀÌ·ç¾îÁ³´Ù. Àϰ¨È£´Â ¿¬ Æò±Õ ¿±·Ï¼Ò ¥á(77.2¡¾36.6 ¥ìg/l)¿Í TP(66.6¡¾20.5 ¥ìg/l)³óµµ ±×¸®°í ¿µ¾ç»óÅÂÁö¼ö (>60) ¸ðµÎ¸¦ Åä´ë·Î ÇÒ ¶§ ¸Å¿ì ºÎ¿µ¾ç»óÅ¿´´Ù. °áºù½Ã±â¿Í ÇØºùµÇ´Â ½Ã±â¿¡ ¼öÃþ³» ¹«±âÁú¼Ò¿Í ÀÎÀÇ ¼öü³» ³óµµ°¡ Áõ°¡ÇÏ¿´´Ù°¡ ¿©¸§Ã¶¿¡´Â °¨¼ÒÇÏ´Â °èÀýÀûÀÎ º¯È­°¡ ³ªÅ¸³µ´Ù. ¼öü³» DIN/DIP (¹«°Ôºñ)ºñÀ²°ú TSIÆíÂ÷ºÐ¼® ±×¸®°í »ý¹°°ËÁ¤ (AGP)½ÇÇèÀ» ÅëÇØ¼­ Áú¼Ò¿Í ÀÎ ¸ðµÎ°¡ ½Ä¹°ÇöûũſÀÇ ¼ºÀåÀ» Á¦ÇÑÇÔÀÌ Á¦½ÃµÇ¾ú´Ù. TSI ÆíÂ÷ºÐ¼® °á°ú¿¡¼­´Â 1³â Áß »ý¹°°ËÁ¤À» ÅëÇØ¼­µµ ÀÎ Á¦ÇÑÀÌ ¿¹ÃøµÈ ¹Ù ÀÖ´Â 9¿ùºÎÅÍ 11¿ù¿¡ Àΰú Áú¼Ò ¸ðµÎÀÇ ½Ä¹°Çöûũſ ¼ºÀå¿¡ ´ëÇÑ Á¦ÇÑÁ¤µµ°¡ °¡Àå Å« °ÍÀ¸·Î ³ªÅ¸³µ´Ù. ÅðÀû¹°³» ÀÎ ÇÔ·®(313¡¾155 mg P/kg)Àº °èÀý¿¡ µû¸¥ º¯È­¸¦ ³ªÅ¸³µ°í, ÀοëÃâ·üÀº pH 9¿¡¼­ 0.29¡¾0.02 Pmg $m^{-2} day^{-1}$·Î °¡Àå ³ô¾Ò´Ù. Áú¼ÒÇÔ·®Àº Æò±Õ 4,452¡¾283.0 mg N/kg¿´À¸¸ç °èÀý¿¡ µû¸¥ Å« Â÷ÀÌ´Â ¾ø¾ú´Ù. ÀÌ·¯ÇÑ °á°úµéÀº ÅðÀû¹°ÀÌ Á¦ÇÑ¿µ¾ç¿°ÀÇ °ø±Þ¿øÀ¸·Î¼­ÀÇ Áß¿äÇÑ ¿ªÇÒÀ» ¼öÇàÇϸç, ÅðÀû¹°³» ÀÎ ÇÔ·®ÀÇ °èÀý¿¡ µû¸¥ º¯È­°¡ Á¶·ùÀÇ »ý¹°·®À» Á¶ÀýÇÒ ¼ö ÀÖÀ½À» ÀǹÌÇÑ´Ù.£¿7¿ùÀÇ ±ÔÁ¶·ù ¿ìÁ¡ ¡æ 8~9¿ù¿¡ ±ÔÁ¶·ù-³²Á¶·ù È¥Àç±â ¡æ 10¿ùÀÇ ³²Á¶·ù ¿ìÁ¡ ¡æ 10~11¿ùÀÇ ±ÔÁ¶·ù ¿ìÁ¡À¸·Î ³ªÅ¸³µ´Ù. ½Ä¹°ÇöûũſÀÇ ÇöÁ¸·®Àº 9¿ù 22ÀÏ Â÷±¤½Ã¼³ ¿ÜºÎÁö¿ª¿¡¼­ ÃÖ°í($1.1{ imes}10^4cells/L$)¸¦, 10¿ù 25ÀÏ ³»ºÎ($4.7{ imes}10^3cells/L$)¿¡¼­ ÃÖÀú¸¦ ³ªÅ¸³Â´Ù. Â÷±¤½Ã¼³¿¡ ÀÇÇÑ ½Ä¹°Çöûũſ ÇöÁ¸·® Àú°¨À²Àº 8~38%(Æò±Õ 19.9%)·Î ³ªÅ¸³µ´Ù. ÀÌ»óÀÇ °á°ú¿¡¼­ Â÷±¤Àº ½Ä¹°ÇöûũſÀÇ ÇöÁ¸·® Àú°¨¿¡ ¾î´À Á¤µµ È¿°ú°¡ ÀÖÀ½À» ¾Ë ¼ö ÀÖ¾ú´Ù.
The present study evaluated water quality variation, limiting nutrient, and sediment of a shallow eutrophic lake (Lake Ilgam) in the metropolitan area from 2000 to 2002. According to annual mean chl.¥á (77.2¡¾36.6 ¥ìg/l) and TP (66.6¡¾20.5 ¥ìg/l) concentration and trophic state index (>60), Lake Ilgam was in very eutrophic status. Both inorganic nitrogen ($NH_3-N$ and $NO_3-N$) and phosphorus (SRP) concentrations in the water column increased during winter and spring, but decreased during summer followed by the phytoplankton development. Evidence for phosphorus and nitrogen as being the potential limiting nutrients for phytoplankton growth was supported by the ratio of DIN/DIP (by mass) (~835.8), TSI derivations, strong nutrient limitation by both N and P occurred from September to November when P content in sediment (114.6 mg P/kg) was relatively low compared with the summer. Sediment contained a large amount of nitrogen (TKN: 4,452¡¾283.0 mg N/kg dry sediment). Phosphorus content in sediment (TP: 313¡¾155 mg P/kg) was relatively low with temporal change. P release rate (0.29¡¾0.02 mg $m^{-2} day^{-1}$) was high under the aerobic condition at pH 9. These results indicate that the sediment could play an important role as a source of a limiting nutrient, and temporal change of P content in the sediment is closely related with water quality, especially algal biomass change in Lake Ilagam.
 
Ű¿öµå
Shallow artificial lake;Eutrophic;AGP;DIN/DIP ratio;TSI;P release;Sediment;
 
Çѱ¹ÇÏõȣ¼öÇÐȸÁö / v.36, no.2, 2003³â, pp.48-161
Çѱ¹ÇÏõȣ¼öÇÐȸ
ISSN : 1976-8087
UCI : G100:I100-KOI(KISTI1.1003/JNL.JAKO200310103401174)
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³í¹® Á¦°ø : KISTI Çѱ¹°úÇбâ¼úÁ¤º¸¿¬±¸¿ø
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