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Çѱ¹ÇÏõȣ¼öÇÐȸ / v.41, no.3, 2008³â, pp.382-394
Àΰø´ï°ú ±× ¿µÇâÀ» ¹Þ´Â ÇÏ·ùÇÏõÀÇ ¼öÁúº¯µ¿ ¿ªµ¿¼º : »ç·Ê ¿¬±¸
( Water Quality Variation Dynamics between Artificial Reservoir and the Effected Downstream Watershed: the Case Study )
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º» ¿¬±¸´Â ´ëû´ï ¹æ·ù¿¡ µû¸¥ ÇÏ·ù ÇÏõ¿¡ ´ëÇÑ ¼öÁúÀÇ ½Ã, °ø°£Àû º¯À̸¦ ÆÄ¾ÇÇϱâ À§Çؼ­ 2000$sim$2007³â±îÁö 8³â°£ ÃøÁ¤µÈ ȯ°æºÎ ¼öÁúÃøÁ¤¸Á ÀڷḦ ºÐ¼®ÇÏ¿´´Ù. ÃÑ 8°³ÀÇ ¼öÁúº¯¼ö¸¦ ÀÌ¿ëÇÏ¿´À¸¸ç, À̵éÀÇ ¼öÁú Ư¼ºÀº ¿¬º°, Á¶»çÁöÁ¡º°, ´ï ¹æ·ù·®º°·Î Å« º¯À̸¦ º¸¿´´Ù. Àü±â Àüµµµµ¿Í ¿µ¾ç¿°·ùÀÎ TN, TP´Â °èÀý ¹× ¿ùº° ºÐ¼®¿¡ ÀÇÇϸé ÇÏ·ù ÇÏõÀÎ S4¿¡¼­ À帶±â¿¡ Å©°Ô °¨¼ÒÇÏ´Â Çö»óÀ» º¸¿´À¸¸ç, ÁöÁ¡º°·Î ºÐ¼®¿¡¼­ ´ëû´ï(S1)¿¡¼­ ÇÏ·ù ÇÏõ(S4)À¸·Î °¥¼ö·Ï Áõ°¡ÇÏ´Â ¾ç»óÀ» º¸¿´´Ù. ¶ÇÇÑ BOD¿Í CODÀÇ °æ¿ìµµ ÇÏ·ù·Î °¥¼ö·Ï Áõ°¡ÇÏ´Â ¾ç»óÀ» º¸ÀδÙ. ÀÌ´Â À帶±â¿¡ Á¤¼ö´ë(Lentic ecosystem)ÀÎ S1¿¡¼­´Â ¿ÜºÎ·ÎºÎÅÍÀÇ ¿µ¾ç¿°·ù ¹× ±âŸ ¿À¿°¹°ÁúÀÇ À¯ÀÔÀ¸·Î ¼ÒÆø »ó½ÂÇϳª À¯¼ö´ë(Lotic ecosystem)ÀÎ S4¿¡¼­´Â »ó·ùºÎ ´ïÀÇ ¹æ·ù·Î ÀÎÇÏ¿© ¿µ¾ç¿°·ù ¹× ±âŸ ¿À¿°¹°ÁúÀÌ Èñ¼®È¿°ú·Î ÀÎÇÏ¿© »ó´ëÀûÀ¸·Î °¨¼ÒÇÏ´Â ¾ç»óÀ» ³ªÅ¸³Â´Ù. SSÀÇ ÁöÁ¡º° Ư¼ºÀ» º¸¸é, À帶±â¿¡ S1¿¡ ºñÇÏ¿© ÇÏ·ùÀÎ S4¿¡¼­ ³ôÀº °ªÀ» º¸¿´´Âµ¥, ÀÌ´Â ´ëÀü½Ã¿¡¼­ Èê·¯³ª¿À´Â ÁöõÀÇ ¿µÇâÀÌ ÇÏ·ù ¼öÁú¾ÇÈ­¿¡ ¿µÇâÀ» ÁØ °ÍÀ¸·Î »ç·áµÈ´Ù. DOÀÇ ¿ùº° Ư¼ºÀ¸·Î´Â ¼ö¿ÂÀÌ »ó½ÂÇÏ´Â À帶±â¿¡ °¡Àå ³·Àº °ªÀ» º¸¿© ¼ö¿Â°ú »ó¹ÝµÇ´Â ¾ç»óÀ» º¸¿´´Ù. S1¿¡¼­´Â À帶°¡ ³¡³­ 10¿ù¿¡ °¡Àå ³·Àº °ªÀ» º¸¿´´Âµ¥ ÀÌ´Â À帶±â ´ëûȣ·Î ÁßÃþ À¯ÀÔµÈ È£¼ö¼ö°¡ À帶 Èı⿡ ¹Ý¿µµÈ °ÍÀ¸·Î »ç·áµÇ¾ú´Ù. ¹Ý¸é, ¼ö¿ÂÀÇ ¿ùº° Ư¼ºÀº À帶±â¿¡ Áõ°¡ÇÏ´Â ¾ç»óÀ» º¸¿´À¸¸ç, ÁöÁ¡º°·Î ´ï³»ÀÇ È£¼ö¼ö¿Í ÃÖÇÏ·ù ÇÏõ¼ö°£¿¡ Å« Â÷À̸¦ º¸¿´´Ù. ÀÌ·¯ÇÑ ÇÏ·ùÇÏõÀÇ ¼öÁúƯ¼ºµéÀº »ó·ù´ïÀÇ ¹æ·ù·®°ú ¹ÐÁ¢ÇÑ ¿¬°ü¼ºÀ» ³ªÅ¸³»°í ÀÖ°í, ÀÌ·± Ư¼ºÀº »ó·ùºÎ ´ïÀÇ ¹æ·ù·® Á¶ÀýÀÌ ÇÏ·ù ÇÏõÀÇ ¼öÁúº¯È­¿¡ Å« ¿µÇâÀ» ÁÖ´Â °ÍÀ¸·Î ³ªÅ¸³µ´Ù.
The objective of this study was to analyze temporal trends of water chemistry and spatial heterogeneity between the dam site (Daecheong Reservoir, S1) and the downstream (S2$sim$S4) using water quality dataset (obtained from the Ministry of Environment, Korea) during 2000$sim$2007. Water quality, based on eight physical and chemical parameters, varied largely depending on the years, sampling sites, and the discharge volume. Conductivity and nutrients (TN and TP) showed a decreasing trend in the downstream (S4) rather than the dam site during the monsoon. Spatial variation increased toward downstream (S4) from Daecheong Reservoir (S1). Also, BOD and COD increased toward downstream. Because of input of nutrient and pollutant nearby S1, lentic ecosystem in monsoon, BOD and COD were slightly increased. whereas relatively decreased in S4, lotic ecosystem in monsoon, by dilution effect of nutrient and pollutant by discharge from upper dam, S1. Spatial variation of SS increased toward downstream (S4) by the side of Daecheong Reservoir (S1). Based on the dataset, efficient water quality management in the point source tributary streams is required for better water quality of downstream. Monthly characteristics of DO showed the lowest value in the monsoon that tend to increase water temperature. DO was lowest in October at S1 because turbid water, input to the Daecheong Reservoir in the monsoon affect to the postmonsoon period. In contrast, water temperature increased toward summer monsoon, in spite of some differences showed between S1 and S4 environment. Overall, the characteristics of water quality in downstream region have close correlation with discharge amount of Daecheong Reservoir. Thus, those characteristics can explain that discharge control of upper dam mainly affect to the water quality variation in downstream reach.
 
Ű¿öµå
Daecheong Reservoir;monsoon rain;downstream;TN:TP mass ratio;
 
Çѱ¹ÇÏõȣ¼öÇÐȸÁö / v.41, no.3, 2008³â, pp.382-394
Çѱ¹ÇÏõȣ¼öÇÐȸ
ISSN : 1976-8087
UCI : G100:I100-KOI(KISTI1.1003/JNL.JAKO200833338919348)
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