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Çѱ¹ÇÏõȣ¼öÇÐȸ / v.36, no.2, 2003³â, pp.24-181
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¿Áõõ(¸¸)À¯¿ªÀ» ´ë»óÀ¸·Î 2002³â 5¿ùºÎÅÍ 9¿ù±îÁö ÃÑ 6ȸ ¼öȯ°æÀ» Á¶»çÇÏ¿´´Ù. ȯ°æ ¿äÀÎÀº ÇÏõ°ú ±¸°£¿¡ µû¶ó Â÷À̰¡ Äǰí, À¯¼öȯ°æ°ú Á¤¼öȯ°æ¿¡¼­ ´õ¿í ÇöÀúÇÏ¿© ´ëºñ°¡ µÇ¾ú´Ù. ¼öÁß ¿µ¾ç¿°Àº »ó·ù ÇÏõ¿¡¼­ ºñ±³Àû Àú³óµµÀ̾úÀ¸³ª, Çϼö󸮼ö À¯ÀÔ ÈĺÎÅÍ °í³óµµ·Î ÀüȯµÇ¾î Á¡¿À¿°¿ø ¿µÇâÀÌ Àý´ëÀûÀ̾ú´Ù. ƯÈ÷, À¯¿ª¿¡¼­ SRP¿Í $NH_4$ÀÇ ºÐÆ÷´Â ´Ù¸¥ ¿µ¾ç¿°¿¡ ºñÇØ ¸Å¿ì ¶Ñ·ÇÇÏ¿´°í, Çϼö󸮼öÀÇ ¿µÇâÀ» Æò°¡ÇÔ¿¡ ÀÖ¾î °¡Àå Áß¿äÇÑ ÀÎÀÚ°¡ µÉ ¼ö ÀÖ¾ú´Ù. Çϼö󸮼öÀÇ À¯ÀÔÁ÷ÈÄ Á¤Á¡¿¡¼­ SRPÀÇ Æò±Õ ³óµµ´Â 919.3§¶ P/l·Î½á À¯¿ª¿¡¼­ °¡Àå ¿µÇâ·ÂÀÌ Äǰí, P ³óµµ¿¡ ÀÇÇØ ¼öÁß ¿µ¾ç¿° ºñÀ²ÀÌ Á¶ÀýµÊÀ» ¾Ë ¼ö ÀÖ¾ú´Ù. Çϼö󸮼öÀÇ Áö¼ÓÀû °ø±ÞÀº ÇÏ·ùÀÇ ¸¸ÀԺο¡¼­ chl-¥á Áõ°¡¸¦ À¯µµÇÏ´Â °áÁ¤ÀûÀÎ ¿äÀÎÀ¸·Î º¼ ¼ö ÀÖ¾ú´Ù. ³²Á¶·ù°¡ ´ë¹ß»ýÇÑ ½Ã±â¿¡ ¸¸ÀԺο¡¼­ chl-¥á ³óµµ´Â 234.5 ~ 1,692.2 §¶/l ¹üÀ§À̾ú°í, 8¿ù¿¡ ÃÖ´ë ÇöÁ¸·®Àº ml´ç 1.0 ¡¿ $10^6$ ¼¼Æ÷¸¦ ÈξÀ ÃʰúÇÏ¿© ´ã¼öÀûÁ¶ ¼öÁغ¸´Ù 200¹è ÀÌ»óÀ̾ú´Ù. ÀÌ·¯ÇÑ °á°ú´Â ´Ù¸¥ ȯ°æ¿äÀο¡¼­ Àß ¹Ý¿µµÇ¾ú°í, ±× Áß¿¡¼­ AFDM/TSS ºñ´Â 100%·Î½á Á¶·ù¿¡ ÀÇÇÑ ¼öÁú¿À¿°ÀÌ ±Ø½ÉÇÔÀ» Àß ¹Ý¿µÇÏ¿´´Ù. µû¶ó¼­, Çϼö󸮼ö¿¡ Æ÷ÇÔµÈ P¿Í N Àú°¨ÀÌ ¼±ÇàµÇ¾î¾ß ÇÏõ ¼öȯ°æ °³¼± »Ó¸¸ ¾Æ´Ï¶ó Àú¼öÁö ¼öÁú °ü¸®¿¡ È¿°ú°¡ ÀÖÀ» °ÍÀ¸·Î º»´Ù.
An investigation was conducted on the aquatic environment of the Okchon Stream watershed six times from May to September 2002. The results of investigation revealed that variation of environmental factors were quite significant for each stream and reach, showing a significant difference between running water and stagnant water. Aquatic nutrients were relatively low in the upstream, gradually increasing as the influx of treated wastewater into the stream increased. This suggests that the point source definitely affected the nutrient content of the stream. In particular, the variations of SRP and $NH_4$ were very distinct in the watershed compared to other nutrients. Thus, it can be considered as a major factor in evaluating the effect of treated wastewater. Immediately after the influx of treated wastewater, the average content of SRP rose to 919.3¥ìg P/l. This was a very effective level in the watershed, suggesting that the percentage of the nutrients in the water was controlled by the content of P. The constant supply of treated wastewater was found to be a critical factor in triggering the increase in chl-¥á in the embayment of the stream. With the proliferation of the blue-green algae, the content of chl-¥á ranged 234.5~1,692.2¥ìg/l. The maximum standing crops exceeded $1.0{ imes}10^6 cells/ml$ in August, which was more than 200 times the level for red tide in the freshwater. This result was well reflected in other environmental factors, with 100% of AFDM/TSS reflecting the severity of water pollution by algae. Therefore, the reduction of P and N contents in the treated wastewater is critical in improving the aquatic environment of the stream as well as water quality management for the reservoir.
 
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watershed;stream;embayment;water quality;eutrophication;nitrogen;phosphorus;wastewater;
 
Çѱ¹ÇÏõȣ¼öÇÐȸÁö / v.36, no.2, 2003³â, pp.24-181
Çѱ¹ÇÏõȣ¼öÇÐȸ
ISSN : 1976-8087
UCI : G100:I100-KOI(KISTI1.1003/JNL.JAKO200310103459182)
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³í¹® Á¦°ø : KISTI Çѱ¹°úÇбâ¼úÁ¤º¸¿¬±¸¿ø
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