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Çѱ¹ÇÏõȣ¼öÇÐȸ / v.34, no.2, 2001³â, pp.106-118
´ëûȣ ÀúÅäÀÇ N, P¹× Si ¿µ¾ç¿° ÇÔ·®°ú Á¶·ù»ýÀåÀáÀç·Â
( The Contents of Nitrogen, Phosphorus, Silicon Nutrient and Algal Growth Potential (AGP) in the Sediment of Taechong Reservoir )
Á¶°æÁ¦;½ÅÀç±â; ÀÎÁ¦´ëÇб³ ȯ°æ½Ã½ºÅÛÇкÎ;°Ç±¹´ëÇб³ Áö¿ª»ýŽýºÅÛ°øÇаú;
 
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´ëûȣ³» 3°³ ÁöÁ¡¿¡¼­ ÀúÅäÀÇ ¿µ¾ç¿°À» Á¶»çÇÏ¿© ¼öÃþ°ú ½Ä¹°Çöûũſ¿¡ ´ëÇÑ »ýÀå ÀáÀç·Â¿¡ ¹ÌÄ¡´Â ¿µÇâÀ» ÆÄ¾ÇÇÏ¿´´Ù. ÀúÅä-¼öÃþÀÇ °æ°è¸é¿¡¼­ DO´Â 0.5 mg $O_{2}$/l ÀÌÇϷμ­ ¹«»ê¼Ò »óÅ¿´´Ù. °ø±Ø¼öÀÇ Àü±âÀüµµµµ´Â ÀúÅ亸´Ù 1.9${sim}$2.6¹è ´õ ³ô¾Ò°í ¼ö½ÉÀÌ ¾èÀ»¼ö·Ï º¯µ¿ÆøÀÌ ÄÇ´Ù. Eh´Â -12${sim}$-148mV ¹üÀ§¿´°í °¡ºñÁßÀº 1.17${sim}$1.30g/cm$^{3}$ ¹üÀ§·Î¼­ Áö¿ª°£¿¡ Â÷À̰¡ Å©Áö ¾Ê¾Ò´Ù. ÇÔ¼öÀ²°ú À¯±â¹° ÇÔ·®Àº °¢°¢ 58%${sim}$72%, 8${sim}$13% ¹üÀ§·Î¼­ ´ï ºÎ±Ù¿¡¼­ ³ô¾Ò°í ¿Áõõ¿¡¼­ ³·¾Ò´Ù. ÀúÅäÀÇ ÀÔµµ Á¶¼ºÀº »çÁúÀÌ 97%¸¦ Â÷ÁöÇÏ¿´´Ù. ÀúÅä³» ÃѼ¼±Õ¼ö¿Í ±ÔÁ¶·ùÀÇ ¼¼Æ÷¹Ðµµ´Â ¼ö½ÉÀÌ ±íÀº ÇÏ·ù¿¡¼­ ³ô¾Ò´Ù. °ø±Ø¼ö¿Í ġȯ¼ºÀÇ Áú¼Ò¿Í ÀÎ ÇÔ·®¿¡¼­ ÀÔÀÚ¼ºÀÌ ¿ëÁ¸¼ºº¸´Ù dzºÎÇÏ¿´°í, ¹«±â Áú¼Ò·Î´Â NH$_{4}$°¡ ´ëºÎºÐÀ̾ú´Ù. ¶ÇÇÑ À¯±â¿Í ¹«±â Áú¼Ò ÇüÅ·Πº¼ ¶§, °ø±Ø¼ö³» Áú¼ÒÇÔ·®Àº ¹«±â Áú¼Ò°¡ ¸¹¾Ò°í, ġȯ¼º Áú¼Ò´Â À¯±â Áú¼Ò°¡ ¸¹¾Ò´Ù. °ø±Ø¼ö ÀÎ ÇÔ·®¿¡¼­ ¿ëÁ¸ À¯±â ÀÎÀÌ ¸¹¾Ò°í ġȯ¼ºÀº ¹«±â ÀÎÀÌ ¸¹¾Ò´Ù. ÀúÅä³» ±Ô¼Ò´Â ġȯ¼ºÀÌ ÃÖ´ë 63%·Î¼­ °ø±Ø¼öº¸´Ù ÈξÀ ¸¹¾Ò´Ù. ´ëûȣÀÇ ÀúÅä´Â À¯±â¹°ÀÌ Ç³ºÎÇÑ ºÎ¿µ¾ç »óÅ·ΠÆò°¡µÇ¾ú´Ù.
The chemistry of porewater and exchangeable nutrients of sediment was determined to define potential influence of sediment nutrients on the water quality and the phytoplankton growth in Taechong Reservoir in March and May of 2000. The sediment-water interface showed almost anoxic state, < 0.5 mg $O_2/l$. Conductivity of the porewater was higher 1.9${sim}$2.6 fold than that of sediment, and its variation was greater in the shallow water. Eh ranged from -12mV to -148 mV and bulk density from $1.17;g/cm^3$ to $1.30;g/cm^3$ and they did not differ among stations. The water content in the sediment ranged from 58% to 72% and organics from 8% to 13%, and they were higher toward the lower part of reservoir. Soil texture was in the order of sand>clay>silt and sandy sediment accounted for 97% of the total sediment. The total bacterial numbers and diatom abundance were high in the downstream of the reservoir. In porewater and exchangeable nutrients of sediment, nitrogen and phosphorus were mostly consist of the particulate form. Inorganic nitrogen was mostly composed of $NH_4$. Nitrogen of porewater was mostly an inorganic form while exchangeable nutrients were composed an organic form. However, phosphorus was composed of dissolved organic fraction in the porewater while inorganic fraction in the exchangeable nutrients. Silicon content of sediment was much exchangeable nutrients with 63%, and it was higher than in the porewater. In summary, the sediments of Taechong Reservoir were mostly composed of organics and assessed to be a eutrophic state.
 
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Exchangeable nutrient;Nitrogen;Phosphorus;Porewater;Silicon;Sediment;Taechong Reservoir;
 
Çѱ¹ÇÏõȣ¼öÇÐȸÁö / v.34, no.2, 2001³â, pp.106-118
Çѱ¹ÇÏõȣ¼öÇÐȸ
ISSN : 1976-8087
UCI : G100:I100-KOI(KISTI1.1003/JNL.JAKO200118317177244)
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