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Çѱ¹ÇÏõȣ¼öÇÐȸ / v.39, no.2, 2006³â, pp.271-283
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( Eutrophication and Freshwater Red-tide Algae on Early Impoundment Stage of Jeolgol Reservoir in the Paikryeong Island, West Sea of South Korea ) |
| ÀÌÈï¼ö;ÇãÁø;¹ÚÀçÃæ;½ÅÀç±â; Çѱ¹¼öÀÚ¿ø°ø»ç ¼öÀÚ¿ø¿¬±¸¿ø;¼¼Á¾´ëÇб³ Áö±¸È¯°æ°úÇаú;Çѱ¹¼öÀÚ¿ø°ø»ç ¾Èµ¿´ï°ü¸®´Ü;Çѱ¹¼öÀÚ¿ø°ø»ç ¼öÀÚ¿ø¿¬±¸¿ø;
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| ¼¶ Áö¿ªÀÇ Ãʱ⠴ã¼ö°úÁ¤¿¡ ÀÖ´Â »ó¼ö¿ø Àú¼öÁö (Àý°îÀú¼öÁö)¿¡¼ ¼ö»ö ¾ÇÈ¿Í ¿©°úÁö Æó»öÀÇ ¿øÀÎÀ» ºÐ¼®Çϱâ À§ÇØ 2005³â 8¿ù¿¡ ½Ä¹°ÇöûũſÀ» Æ÷ÇÔÇÑ ´Ù°¢ÀûÀÎ ¼öȯ°æ Á¶»ç¸¦ ¼öÇàÇÏ¿´´Ù. Àú¼öÁöÀÇ ÇüÅ´ ´Ü¼øÇÏ¿´°í, Æò±Õ ¼ö½ÉÀº 5.5 m·Î¼, »ó·ù¿¡¼ ¾è°í ´ï ºÎ±Ù¿¡¼ °¡Àå ±í¾ú´Ù. ȯ°æ¿äÀÎ Áß¿¡¼ ¼öÆòÀû ¶Ç´Â ¼öÁ÷Àû Â÷À̰¡ Å« ÀÎÀÚ´Â DO, Chl-aÀ̾ú°í,°¡Àå ÀÛÀº ÀÎÀÚ´Â ¼ö¿ÂÀ̾ú´Ù. ¼öÁß Åõ¸íµµ´Â 0.6 ${sim}$ 0.9 m¹üÀ§(Æò±Õ°ª 0.7 m)À̾ú°í, ʵµÀÇ Æò±Õ°ªÀº 9.3 NTU (8.0 ${sim}$ l2.1 NTU¹üÀ§)À̾ú´Ù. ÈÄ¸íµµ¿Í ʵµÀÇ Áõ°¨¿äÀÎÀº »ý¹° ¶Ç´Â ºñ»ý¹°ÀÇ º¹ÇÑÀûÀÎ ¿µÇâÀ¸·Î ´Þ ¼ö ÀÖ¾ú°í °ø°£ÀûÀÎ Â÷À̵µ ź¿µµÇ¾ú´Ù. ¼ö»öÀÌ Å¹ÇÑ °ÍÀº ¹«±âÀÔÀÚÀÇ Áõ°¡¿Í ½Ä¹°Çöûũſġ °ú´ëÁõ½Ä ¿µÇâÀÌ ÁÖµÈ ¿øÀÎÀ̾ú°í, ¿©°úÁö Æó»öÀº Àú¼öÁö·ÎºÎÅÍ ½Ä¹°ÇöûũſÀÇ °úÀ× °ø±Þ¿¡ ÀÇÇÑ ¹®Á¦Á¡À̾ú´Ù. Àú¼öÁö ³» chlorophyll-a³óµµÀÇ ¹üÀ§¿Í Æò±Õ°ªÀº »óÃþ¿¡¼ 31.6 ${sim}$ 258.9 ${mu}g;L^{-1}$, 123.6 ${mu}g;L^{-1}$, ÀúÃþ¿¡¼ 17.0 ${sim}$ 37.4 ${sim}$, 26.5 ${sim}$À̾ú´Ù. Chlorophyll-aÀÇ Áõ°¡´Â ´ã¼öÀûÁ¶ÀÇ ´ë¹ß»ý ¿µÇâÀ̾ú°í, ÁÖÁ¾Àº ¿ÍÆí¸ðÁ¶·ù Peridinium bipes f. occultatumÀ̾ú´Ù. PeridiniumÀÇ ºÐÆ÷´Â chlorophyll-a³óµµ¿Í ¹ÐÁ¢ÇÑ °ü·Ã¼ºÀÌ ÀÖ¾ú´Ù. ´ã¼öÀûÁ¶ÀÇ ÇöÁ¸·®Àº »ó·ùÁö¿ª¿¡¼ $8.5;{ imes};10^3;cell;mL^L{-1}$·Î¼ ¸¹¾Ò°í, ´ïºÎ±ÙÀÇ ÇÏ·ùÁö¿ª($4.4;{ imes};10^2;cell;mL^L{-1}$)À¸·Î °¥¼ö·Ï °¨¼ÒÇÏ´Â ¾ç»óÀ» º¸¿´´Ù. ¶ÇÇÑ, ´ã¼öÀûÁ¶ÀÇ ¿øÀÎÁ¾À¸·Î ±ÔÁ¶·ù Synedra acus¿Í ³²Á¶·ù Microcystis aeruginosaµµ ¼Ò·®°üÂûµÇ¾ú´Ù. Àú¼öÁöÀÇ ¼öÁú ºÎ¿µ¾çÈ Çö»óÀº ±âÁ¸ °æ»ç»ç¸éÇü ³ó°æÁö¸¦ ±â¹ÝÀ¸·Î Á¶¼ºµÇ¾úÀ¸¹Ç·Î ÀúÃþÀ¸·ÎºÎÅÍ Ç³ºÎÇÑ ¿µ¾çȯ°æÀ» ³»ÀçÇϰí ÀÖ¾ú°í, ´ã¼ö Ãʱ⿡ ¹ß»ýÇÒ ¼ö ÀÖ´Â °¡´É¼ºÀ» Æ÷ÇÔÇϰí ÀÖ¾ú´Ù. ¶ÇÇÑ À¯ÀÔ¼ö·®ÀÇ ºÎÁ·°ú ÇöÀç ¼öÁú°³¼±À» À§ÇØ Àû¿ëÇϰí ÀÖ´Â ¼öÁ߯ø±â½Ã¼³µîÀÇ ¹°¸®ÀûÀÎ ¿µÇâµµ Á÷ ${cdot}$ °£Á¢ÀûÀ¸·Î ÀÛ¿ëÇÏ¿´À» °ÍÀ¸·Î ÃßÁ¤µÇ¾ú´Ù µû¶ó¼ ÇâÈÄ ÀÌ¿¡ ´ëÇÑ ÁßÀå±âÀûÀÎ ¸ð´ÏÅ͸µÀÌ ÇÊ¿äÇÏ¿´°í À¯¿ª°ú Àú¼öÁöÀÇ ÅëÇÕÀûÀÎ ¼öÁú°ü¸®°èȹ ÀÌ ¿ä±¸µÇ¾ú´Ù. |
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| A systematic water quality survey was conducted in August, 2005 for a drinking water supply reservoir (the Jeolgol reseuoir located in an island), which is at an early stage of impoundment, to investigate the causes of water color deterioration of the reservoir and the clogging of filter beds of a water treatment plant. The reservoir shape was simple and its average depth was 5.5 m, increasing from upreservoir toward the downreservoir end near the dam. Dissolved oxygen (DO) and chloropllyll-a (chi-a) showed a large variation while water temperature had a smaller range. Transparency ranged from 0.6 to 0.9 m (average 0.7 m). The average value of turbidity was 9.3 NTU, ranging from 8.0 ${sim}$ 12.1 NTU. The transparency and the turbidity appear to be affected by a combination of biological and non-biological factors. The poor transparency was explained by an increase of inorganic colloids and algal bloom in the reservoir. The blockage of the filter bed was attributed to the oversupply of phytoplanktons from the reservoir. The range and the average concentration of chi-a within the reservoir were 31.6 ${sim}$ 258.9 ${mu}g;L^{-1}$, 123.6 ${mu}g;L^{-1}$ for the upper layer, and 17.0 ${sim}$ 37.4 ${mu}g;L^{-1}$, 26.5 ${mu}g;L^{-1}$ for the bottom layer, respectively. A predominant species contributing the algal bloom was Dinophyceae, Peridinium bipes f. occultatum. The distribution of Peridinium spp. was correlated with chi-a concentrations. The standing crop of phytoplankton was highest in the upreservoir with $8.5;{ imes};103;cells;mL^{-1}$ and it decreased toward the downresevoir. Synedra of Bacillariophyceae and Microcystis aeruginosa of Cyanophyceae appeared to contribute to the algal bloom, although they are not dominated. It is mostly likely that sloped farmlands located in the watershed of the reservoir caused water quality problems because they may contain a significant amount of the nutrients originated from fertilizers. In addition, the aerators installed in the reservoir and a shortage of the inflowing water may be related to the poor water quality. A long-term monitoring and an integrated management plan for the water quality of the watersheds and the reservoir may be required to improve the water quality of the reservoir. |
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| Ű¿öµå |
| reservoir;water quality;eutrophication;phytoplankton;freshwater redtide; |
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Çѱ¹ÇÏõȣ¼öÇÐȸÁö / v.39, no.2, 2006³â, pp.271-283
Çѱ¹ÇÏõȣ¼öÇÐȸ
ISSN : 1976-8087
UCI : G100:I100-KOI(KISTI1.1003/JNL.JAKO200618317186996)
¾ð¾î : Çѱ¹¾î |
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| ³í¹® Á¦°ø : KISTI Çѱ¹°úÇбâ¼úÁ¤º¸¿¬±¸¿ø |
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