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Çѱ¹ÇÏõȣ¼öÇÐȸ / v.37, no.4, 2004³â, pp.411-422
Ⱦ¼ºÈ£ÀÇ À°¼öÇÐÀû Á¶»ç¿Í ÀκÎÇÏ
( The Limnological Survey and Phosphorus Loading of Lake Hoengsung )
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Ⱦ¼ºÈ£¿¡¼­´Â ¼öÁ߯ø±â ±â°£¿¡µµ ¼ö¿Â¾àÃþÀÌ Çü¼ºµÇ¾úÀ¸¸ç, ¼öÁ߯ø±â·Î ÀÎÇÑ ¿µÇâÀÌ Å©Áö ¾ÊÀº °ÍÀ¸·Î ÆÇ´ÜµÈ´Ù. ¸ðµç Á¤Á¡ÀÇ Ç¥Ãæ(0-5m)Æò±Õ ʵµ´Â 0.1-8.5NTU·Î ¿ì±â ÀÌÈÄ¿¡ ÁßÃþ ¹× ½ÉÃþ¿¡¼­ ³ô¾Ò´Ù. Åõ¸íµµ´Â 0.9-3.5mÀÇ ¹üÀ§·Î ´ï ÇÏ·ù(St. 1)Á¤Á¡¿¡¼­ Å©°Ô ³ªÅ¸³µÀ¸¸ç, »ó·ù·Î °¥¼ö·Ï ³·¾Ò´Ù. ¿ëÁ¸»ê¼Ò´Â 2000³â 7¿ù°ú 8¿ù¿¡ Àü ÁöÁ¡ÀÇ 0m¿¡¼­ $8.4-14.1;mgO_2;{cdot};L^{-1}$·Î ³ô¾ÒÀ¸³ª ½ÉÃþ¿¡¼­´Â °í°¥ »óŸ¦ º¸¿´´Ù. ¶ÇÇÑ 2001³â 7¿ù°ú 9¿ù¿¡µµ Á¤Á¡ 1ÀÇ ½ÉÃþ¿¡¼­ $1;mgO_2;{cdot};L^{-1}$ ³»¿Ü·Î ¸Å¿ì ³·¾Ò´Ù. Àü Á¤Á¡ÀÇ Ç¥Ãþ (0-5 m)Æò±Õ ÃÑÀÎ ³óµµ´Â 5-46 mgP ${cdot}$ $m^{-3}$·Î Ãʺ½ÀÇ turnover Á÷ÈÄ ¹× ¿ì±âÀÌÈÄ¿¡ ³ô¾ÒÀ¸¸ç ¿ëÁ¸ ¹«±âÀÎ ³óµµ´Â 0.2-13.2 mgP ${cdot}$ $m^{-3}$·Î 2001³â 9¿ùÀ» Á¦¿ÜÇϰí´Â ´ëºÎºÐ10mgp ${cdot}$ $m^3$ÀÌÇÏ ÀÌ¿´´Ù. Ⱦ¼ºÈ£ÀÇ ¿¬°£ ÀκÎÇÏ·®Àº ¾à 4.45ton Á¤µµ·Î À¯¿ª³»¿¡¼­ ¹ß»ýµÇ´Â ÃÑÀÎ ¹ß»ý·® 71.34tonÁß ¾à 6.2%¸¸ÀÌ È£¼ö³»·Î À¯ÀԵǴ °ÍÀ¸·Î ³ªÅ¸³µ´Ù. ¼ö¸éÀû´ç ÀκÎÇÏ·®Àº0.77 gp ${cdot};m^2;{cdot};yr^{-1}$À¸·Î Ⱦ¼ºÈ£ÀÇ È¯°æ¿ë·®À̶ó ÇÒ ¼ö ÀÖ´Â °úÀ×ÀÓ°èºÎÇÏ·® 0.72 gp ${cdot};m^2;.;yr^{-1}$À» 0.05 gP ${cdot};m^2;.;yr^{-1}$ ÃʰúÇÑ ¼öÁØÀÌ´Ù. Àü Á¤Á¡ Ç¥Ãþ (0-5 m)Æò±Õ ÃÑÁú¼Ò ³óµµ´Â 0.83-3.55 mgN ${cdot};L^{-1}$·Î ¿ì±â ÀÌÈÄ¿¡ ÁßÃæ ÀÌÇÏ Áö¿ª¿¡¼­ ³ô¾Ò´Ù. Áú»ê¼º Áú¼Ò´Â Àü Á¤Á¡ÀÇ Ç¥Ãþ(0-5m)Æò±ÕÀÌ 0.09-3.33 mgN ${cdot};L^{-1}$·Î 2001³â 6¿ù¿¡ °¡Àå ³·¾Ò´Ù. ¾Ï¸ð´Ï¾Æ¼º Áú¼Ò´Â Àü Á¤Á¡ÀÇ Ç¥Ãþ(0-5m)Æò±ÕÀÌ 0.04-0.23 mgN ${cdot};L^{-1}$ÀÌ¿´´Ù. Àü Á¤Á¡ Ç¥Ãþ (0-5 m)Æò±Õ ±Ô¼Ò³óµµ´Â 0.5-9.6 mgSi ${cdot};L^{-1}$·Î º½Ã¶¿¡ ³·¾ÒÀ¸¸ç, ¿ì±âÀÌÈÄ¿¡ ´Ù½Ã Áõ°¡ÇÏ¿´´Ù. Æò±Õ TSI´Â 2000³â°ú 2001³â¿¡ °¢°¢ 59¿Í 57À̾ú´Ù. Àü Á¤Á¡ Ç¥Ãþ (0-5 m)Æò±Õ ¿±·Ï¼Ò a³óµµ´Â 0.3-32.4 mg ${cdot};m^{-3}$·Î ¿©¸§Ã¶¿¡ ³ôÀº °æÇâÀ» º¸¿´À¸¸ç, Á¤Á¡º°·Î´Â »ó·ùÁö¿ª¿¡¼­ ³ô¾Ò´Ù. ½Ä¹°ÇöûũſÀº 2000³â 7¿ù¿¡ ³ìÁ¶·ùÀÎ Scenedesmus sp.°¡ 10,480 cells ${cdot};mL^{-1}$,8¿ù°ú 9¿ù¿¡´Â ³²Á¶·ùÀÎ Microcystis sp.°¡ °¢°¢ 3,492¿Í 296 cells ${cdot};mL^{-1}$·Î ¿ìÁ¡ÇÏ¿´´Ù. 10¿ù¿¡´Â ³ìÁ¶·ùÀÎ Coelastrum microporumÀÌ 133 cells ${cdot};mL^{-1}$, 11¿ù¿¡´Â ±ÔÁ¶·ùÀÎ Asterionella formosa°¡ 2,654 cells ${cdot};mL^{-1}$, 12¿ù¿¡´Â ±ÔÁ¶·ùÀÎ .Aulacoseira granulata°¡ 29 cells ${cdot};mL^{-1}$¿ìÁ¡Á¾ÀÌ¿´´Ù. ƯÈ÷ 2000³â ¿©¸§Ã¶¿¡ ¿ìÁ¡Á¾ÀÌ¿´´ø ³²Á¶·ù°¡ 2001³â¿¡´Â ÃâÇöÇÏÁö ¾Ê¾ÒÀ¸¸ç Á¾ ´Ù¾ç¼º (diversity)Áö¼ö´Â 2000³â 7¿ù¿¡ 2.22·Î °¡Àå ³ô¾ÒÀ¸¸ç, »ý¹°·®µµ Á¶»ç±â°£Áß 36,640 cells ${cdot};mL^{-1}$·Î °¡Àå ¸¹¾Ò´Ù.
A limnological survey was conducted in a reservoir, Lake Hoengsung located in Kangwondo, Korea, from July 2000 to September 2001 on the monthly basis. Phosphorus loading from the watershed was estimated by measuring total phosphorus concentration in the main tributary. Secchi disc transparency, epilimnetic (0-5 m) turbidity, chlorophyll a (Chl-a), total phosphorus (TP), total nitrogen(TN) and silica concentration were in the range of 0.9-3.5 m, 0.1-8.5 NTU, 0.3-32.4 mgChl $m^{-3}$, 5-46 mgP $m^{-3}$, 0.83-3.55 mgN $L^{-1}$ and 0.5-9.6 mgSi $L^{-1}$, respectively. Green algae and cyanobacteria dominated phytoplankton community in warm seasons, from July through October, 2000. In July a green alga (Scenedesmus sp.) was dominant with a maximum cell density of 10,480 cells mL. Cyanobacteria (Microcystics sp.) dominated in August and September with cell density of 3,492 and 295 cells mL ,respectively. Species diversity of phytoplankton was highest (2.22) in July. The trophic state of the reservoir can be classified as eutrophic on the basis of TP, Chl-a, and Secchi disc transparency. Because TP concentration was high in flood period, most of phosphorus loading was concentrated in rainy season. TP loading was calculated by multiplying TP and flow rate. The dam managing company measured inflow rate of the reservoir daily, while TP was measured by weekly surveys. TP of unmeasured days was estimated from the empirical relationship of TP and the flow rate of the main tributary; $TP=5.59Q^{0.45};(R^2=0.47)$. Annual TP loading was calculated to be 4.45 tP $yr^{-1}$, and the areal P loading was 0.77 gP $m^{-2};yr^{-1}$ which is similar to the critical P loading for eutrophication by Vollenweider's phosphorus model, 0.72 gP $m^{-2};yr^{-1}$.
 
Ű¿öµå
Lake Hoengsung;limnological survey;phosphorus loading;trophic state;
 
Çѱ¹ÇÏõȣ¼öÇÐȸÁö / v.37, no.4, 2004³â, pp.411-422
Çѱ¹ÇÏõȣ¼öÇÐȸ
ISSN : 1976-8087
UCI : G100:I100-KOI(KISTI1.1003/JNL.JAKO200418317183509)
¾ð¾î : ¿µ¾î
³í¹® Á¦°ø : KISTI Çѱ¹°úÇбâ¼úÁ¤º¸¿¬±¸¿ø
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