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Çѱ¹ÇÏõȣ¼öÇÐȸ / v.41, no.3, 2008³â, pp.348-359
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»ó·ù´ï °Ç¼³¿¡ µû¸¥ ´ëûȣ ºÎ¿µ¾çÈ¿¡ ´ëÇÑ ±â´É º¯È
( Functional Modifications of Daechung Reservoir Eutrophication by Upper Dam Construction ) |
| À̼øÃ¶;ÇÑÁ¤È£;¾È±¤±¹; Ãæ³²´ëÇб³ »ý¸í°úÇаú;Ãæ³²´ëÇб³ »ý¸í°úÇаú;Ãæ³²´ëÇб³ »ý¸í°úÇаú;
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| º» ¿¬±¸¿¡¼´Â ´ëûȣ »ó·ù¿¡ À§Ä¡ÇÑ ¿ë´ã´ïÀÇ °Ç¼³¿¡ µû¸¥ ´ëûȣÀÇ ¼ö¹®ÇÐÀû ¿µÇâ ¹× ÀÌÈÇÐÀû, »ýÅÂÇÐÀû ±â´Éº¯È¿¡ ´ëÇÑ Æ¯¼ºÀ» ±Ô¸íÇϰí, ¿µ¾ç¿°·ù(TN, TP), ¿±·Ï¼Ò-a ¹× Åõ¸íµµÀÇ ºÎ¾ç¾çÈ º¯¼öÀÇ ½Ã°ø°£Àû(°èÀýº°, ¿¬º°, »óÇÏ·ù °£) ¿ªµ¿¼ºÀ» ºÐ¼®ÇÏ¿´´Ù. ¿ë´ã´ï °Ç¼³ ÀÌÀü(BDC; 1995$sim$2000³â)°ú ÀÌÈÄ(ADC; 2001$sim$2006³â)ÀÇ ¼ö¹®ÇÐÀû ÀڷḦ ÅëÇØ ´ëûȣÀÇ À¯ÀÔ·®°ú Àú¼ö·®ÀÇ º¯È¸¦ »ìÆì º» °á°ú, ´ëûȣÀÇ BDC¿¡´Â °¼ö·®°ú À¯ÀÔ·®ÀÇ ³ôÀº »ó°ü°ü°è¸¦ º¼ ¼ö ÀÖ¾úÀ¸³ª, ADC¿¡´Â º¸´Ù ³·Àº »ó°ü°ü°è¸¦ È®ÀÎÇÏ¿´´Ù(BDC; r=0.964, p=0.002, ADC; r=0.857, p=0.029). ÀÌ´Â ¿ë´ã´ïÀÇ °Ç¼³ÀÌ ´ëûȣÀÇ À¯ÀÔ·®°ú Àú¼öÀ§ µî¿¡ ¿µÇâÀ» ÁÖ°í ÀÖ´Ù°í »ç·áµÈ´Ù. ¿ë´ã´ï °Ç¼³·Î ÀÎÇÏ¿© °¡Àå Å« º¯È´Â »ó·ù·ÎºÎÅÍÀÇ À¯ÀÔ·® °¨¼Ò¿¡ µû¸¥ ´ëûȣÀÇ TN ¹× TP ³óµµ´Â Àü ÁöÁ¡¿¡¼ °¨¼ÒÇÏ¿´À¸³ª È£¼ö ³» ¼öü·ù ½Ã°£ÀÇ Áõ°¡·Î CHLÀÇ ¾çÀÌ »ó´ëÀûÀ¸·Î Áõ°¡ÇÏ´Â °æÇâÀ» º¸¿´´Ù. BDCÀÇ CHL°ú TPÀÇ »ó°ü°ü°è´Â ADC ÀÌÈÄ¿¡ Áõ°¡ÇÏ´Â ¾ç»óÀ¸·Î ºÐ¼®µÇ¾ú´Âµ¥(BDC; r=0.249, p=0.000, ADC; r=0.412, p=0.000), ÀÌ´Â »ó´ëÀûÀ¸·Î °¨¼ÒÇÑ TPÀÇ ¾ç¿¡ ´ëÇØ ³ôÀº ¹ÝÀÀ¼ºÀ» °¡Áö°Ô µÈ °ÍÀ¸·Î »ç·áµÈ´Ù. CHL : TP ratioÀÇ º¯È´Â ADC¿¡ ¿À¸é¼ Áõ°¡ÇÏ´Â °ÍÀ» º¸¿© CHL°ú TPÀÇ °ü°è°¡ ´ï°Ç¼³ ÀÌÈÄ¿¡ º¯ÈÇÏ¿´À½À» º¸¿©ÁÖ°í ÀÖ´Ù. È£¼ö ³»ÀÇ °ø°£Àû º¯À̸¦ º¼ ¶§ À¯¼ö´ë(Riverine zone, RZ)¿¡¼ÀÇ ¼öÁú º¯¼ö º¯ÈÆøÀº ÀüÀÌ´ë(Transition zone, TZ)³ª Á¤¼ö´ë(Lacustrine zone, LZ)¿¡ ºñÇØ ³ôÀº °ÍÀ¸·Î ³ªÅ¸³µ´Âµ¥, ÀÌ´Â ÀΰøÈ£ÀÇ »ó·ùºÎ¿¡ À§Ä¡Çϸç, ºü¸¥ À¯¼Ó, ªÀº ü·ù½Ã°£, ¸¹Àº ¿µ¾ç¿°·ù À¯ÀÔÀÇ Æ¯¼ºÀ» º¸À̴ ȣ¼öÀÇ À¯¼ö´ë(RZ)¿¡¼ ¿µ¾ç¿°·ù, ±¤Á¶°Ç ¹× CHL-TPÀÇ ÇÔ¼ö°ü°è¿¡ ´ëÇÑ ±â´ÉÀûÀÎ º¯È°¡ ÀÖ¾úÀ½À» ½Ã»çÇÑ´Ù. |
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| The objectives of the study were to elucidate functional modifications in relation to hydrological, physico-chemical and ecological aspects in Daechung Reservoir by the upper dam constructions of Youngdam Reservoir and analyze temporal and spatial dynamic patterns using trophic parameters of TN, TP, chlorophyll (CHL), and Secchi depth (SD). Hydrological data such as inflow, precipitation, and water levels before (BDC, 1995$sim$2000) and after (ADC, 2001$sim$2006) the dam construction showed that precipitation had greater correlations with inflow volume in the BDC (r=0.964, p=0.002) than in the ADC (r=0.857, p=0.029). This outcome indicates that the upper dam construction influenced the inflow and water level of Daechung Reservoir. One of the greatest changes after the dam construction was decreases of nutrient contents (TN, TP) and increases of algal biomass (as CHL) as the water residence time increases. Values of CHL had greater relations with TP in the ADC (r=0.412, p<0.001) than the BDC (r=0.249, p<0.001), indicating that CHL had greater response at a given phosphorus in the ADC. Thus, algal yield at a given TP (CHL : TP ratios) increased in the ADC, resulting in a greater CHL-TP relations. Long-term interannual TP, TN, SD, and CHL showed greater variations in the riverine zone (RZ) than any other transition (TZ) and lacustrine zones (LZ). This phenomenon was mainly attributed to rapid hydrological response in the riverine zone (RZ) to flow reductions (short water residence time) from the upper dam, resulting in ambient contents of nutrients and light regime along with functional relations of CHL-TP. |
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| Ű¿öµå |
| Daechung Reservoir;monsoon rain;empirical model;nutrients; |
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Çѱ¹ÇÏõȣ¼öÇÐȸÁö / v.41, no.3, 2008³â, pp.348-359
Çѱ¹ÇÏõȣ¼öÇÐȸ
ISSN : 1976-8087
UCI : G100:I100-KOI(KISTI1.1003/JNL.JAKO200833338919341)
¾ð¾î : Çѱ¹¾î |
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| ³í¹® Á¦°ø : KISTI Çѱ¹°úÇбâ¼úÁ¤º¸¿¬±¸¿ø |
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