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Çѱ¹ÇÏõȣ¼öÇÐȸ / v.34, no.1, 2001³â, pp.30-44
±¹³» ÁÖ¿ä È£¼öÀÇ À°¼öÇÐÀû Á¶»ç(4) : ÁÖ¾ÏÈ£
( The Limnological Survey of Major Lakes in Korea (4): Lake Juam )
±è¹üö;Çã¿ì¸í;ÀÓº´Áø;Ȳ±æ¼ø;ÃÖ±¤¼ø;ÃÖÁ¾¼ö;¹ÚÁÖÇö; °­¿ø´ëÇб³ ȯ°æÇаú;»ïô»ê¾÷´ëÇб³ ȯ°æ°øÇаú;±¹¸³È¯°æ¿¬±¸¿ø;°­¿ø´ëÇб³ ȯ°æÇаú;°­¿ø´ëÇб³ ȯ°æÇаú;°­¿ø´ëÇб³ ȯ°æÇаú;ÇѰ­À¯¿ªÈ¯°æ°ü¸®Ã»;
 
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¼öÀÚ¿ø°ü¸®¿¡ Áß¿äÇÑ À°¼öÇÐÀû Á¤º¸¸¦ Á¦°øÇϱâ À§ÇØ 1993³â 6¿ù¿¡¼­ 1994³â 5¿ù±îÁö ÁÖ¾ÏÈ£¿¡ ´ëÇÏ¿© ¿ù°£ Á¶»ç¸¦ ½Ç½ÃÇÏ¿´´Ù. Ç¥ÃþÀÇ Åõ¸íµµ, ¿±·Ï¼Ò a, ÃÑÁú¼Ò, ÃÑ ÀÎ³óµµ ¹× ÀÏÂ÷»ý»ê·ÂÀº Á¶»ç±â°£ °¢°¢ 1.7${sim}$4.5 m, 0.9${sim}$12.5 mgChl/m$^{3}$, 0.53${sim}$1.48 mgN/l, 6${sim}$29 mgP/m$^{3}$, 304${sim}$2,549mgCm$^{-2}$day$^{-1}$·Î À̵éÀÇ ÇÏ°è Æò±Õ³óµµ·Î »êÁ¤ÇÑ ÁÖ¾ÏÈ£ÀÇ ¿µ¾ç»óÅ´ Áß¿µ¾çÈ£·Î ÇØ´çµÈ´Ù. À¯¿ªÀ¸·ÎºÎÅÍÀÇ ÀÎ À¯ÀÔÀº ÁýÁßÈ£¿ì½Ã¿¡ ´Ù·® À¯ÀԵDZ⠶§¹®¿¡ ÃÑÀÎ ³óµµµµ Çϰ迡 ³ô°í µ¿°è¿¡ ³·´Ù. ÁÖ¾ÏÈ£ÀÇ ¿¬°£ ¼ö¸éÀû´ç ÀκÎÇÏ·®Àº 0.94gPm$^{-2}$yr$^{-1}$·Î ºÎ¿µ¾çÈ­ ÀÓ°èºÎÇÏ·®(1.0gPm$^{-2}$yr$^{-1}$)¿¡ °ÅÀÇ ±ÙÁ¢Çϰí ÀÖ´Ù. ÁÖ¾ÏÈ£¿¡¼­ ½Ä¹°Çöûũſ¿¡ ´ëÇÑ Á¦ÇÑ¿µ¾ç¼Ò Á¶»ç°á°ú Àΰú Áú¼Ò°¡ µ¿½Ã¿¡ ¼ºÀåÀ» Á¦ÇÑÇÏ´Â ¿ä¼Ò·Î ³ªÅ¸³µ´Ù. ½Ä¹°Çöûũſ±ºÁýÀÇ °èÀýº° õÀ̾ç»óÀº ¿Â´ëÈ£¼öÀÇ ÀϹÝÀû °æÇâ°ú °°ÀÌ µ¿°è¿¡ Ãá°è¿¡´Â ±ÔÁ¶·ù(Asterionella formosa, Aulacoseira granulata var. angustissima)°¡ ¿ìÁ¡ÇÏ¿´°í, Çϰ迡´Â ³²Á¶·ù(Microcystis aeruginosa, M. sp., M. viridis)°¡ ¿ìÁ¡ÇÏ¿´´Ù. µ¿¹°ÇöûũſÀº ¿ä°¢·ù À¯»ýÀÌ ¿¬Áß ¿ìÁ¡ÇÏ¿´°í 8¿ù¿¡´Â ¿ä°¢·ù À¯»ý À̿ܿ¡ Áö°¢·ùÀÎ Bosminopsis longirostris°¡ °¢°¢ ¿ìÁ¡ÇÏ¿´´Ù. Á¶»ç±â°£ ÁÖ¾ÏÈ£ ÅðÀû¹°ÀÇ Á¶»ç Á¤Á¡º° À¯±âź¼Ò ¹× ÀÎ, Áú¼ÒÀÇ Æò±Õ ÇÔ·®Àº °¢°¢ 9.5${sim}$14.0 mgC/g, 1.0${sim}$1.82mgP/g, 0.51${sim}$0.65mgN/gÀÇ ºÐÆ÷¸¦ º¸¿©ÁÖ¾ú´Ù. ÁÖ¾ÏÈ£ À¯¿ªÀ¸·ÎºÎÅÍÀÇ À¯±â¹° À¯ÀÔ·®Àº 1,222 tonC/yrÀÌ¸ç ½Ä¹°ÇöûũſÀÇ ÀÏÂ÷»ý»ê¿¡ ÀÇÇÑ ÀÚü»ý¼ºÀ¯±â¹°·®Àº 6,718 ton/yrÀ¸·Î Àüü À¯±â¹°ºÎÇÏ·®Áß ÀÚü»ý¼º À¯±â¹° ºñÀ²ÀÌ ´ëºÎºÐÀ» Â÷ÁöÇß´Ù. ÁÖ¾ÏÈ£ÀÇ ºÎ¿µ¾çÈ­¸¦ ¹æÁöÇϱâ À§ÇØ ¾ÕÀ¸·ÎÀÇ À¯¿ª°ü¸®´Â Á¡¿À¿°¿øÀÇ °ü¸®¿Í ´õºÒ¾î ºñ·á»ç¿ë·®ÀÇ Ãà¼Ò, Ãà»êºÐ´¢ÀÇ ÀûÀýÇÑ Ã³¸®, Åä¾çÀ¯½Ç¹æÁöµî À¯¿ªÀÇ ºñÁ¡¿À¿°¿ø¿¡ ´ëÇÑ °ü¸®¿¡ ´õ¿í ÁýÁßÇØ¾ß ÇÒ °ÍÀ¸·Î º¸ÀδÙ.
In this study limnological characteristics of Lake Juam was surveyed from June 1993 to May 1994 in order to provides important information regarding water resources. Secchi disc transparency, epilimnetic chlorophyll a (chi-a), total nitrogen (TN), total phosphorus (TP) concentration and primary productivity were in the range of $2.0{sim}4.5;m$, $0.9{sim}13.6;mgChl/m^3$, 0.78${sim}$2.32 mgN/l, $11{sim}56;mgP/m^3$, $270{sim}2.160;mgCm^{-2};day^{-1}$, respectively. On the basis of TP, Chl-a and Secchi disc depth, the trophic state of Lake Juam can be classied as mesotrophic lake. The phosphorus inputs from non-point sources are concentrated in heavy rain episodes during the monsoon season. As a result, phosphorus concentration are higher in summer than in winter. TP loading from the watershed were estimated to be $0.9;gPm^{-2}yr^{-1}$, which correspond to a boundary of the critical loading ($1.0;gPm^{-2}yr^{-1}$) for eutrophication. From the results of the algal assay, both phosphous and nitrogen act as limiting nutrients in algal growth. The seasonal succession of phytoplankton community structure in Lake Juam was similar to that observed in other temperate lakes. Diatoms (Asterionella formosa and Aulacoseira granulate var. angustissima)fujacofeira BraHuJafa uar. aHgusHrsiaia) weredominant in spring and winter, cyanobacteria) were dominant in warm season. The organic carbon, nitrogen and phosphorus content of lake sediment were $9.5{sim}14.0;mgC/g$, $1.01{sim}1.82;mgN/g$ and $0.51{sim}0.65;mgP/g$, respectively. The allochthonous organic carbon loading from the watershed and autochthonous organic carbon loading by primary production of phytoplankton were determined to be 1,122 tC/yr and 6,718 tC/yr, respectively. To prevent eutrophication of Lake Juam, nutrient management of watershed should be focus on reduction of fertilizer application, proper treatment of manure, and conservation of topsoil as well as point source.
 
Ű¿öµå
Lake Juam;Limnological characteristics;Trophic state;Phytoplankton;
 
Çѱ¹ÇÏõȣ¼öÇÐȸÁö / v.34, no.1, 2001³â, pp.30-44
Çѱ¹ÇÏõȣ¼öÇÐȸ
ISSN : 1976-8087
UCI : G100:I100-KOI(KISTI1.1003/JNL.JAKO200118317176787)
¾ð¾î : Çѱ¹¾î
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