주암호 상수원 상류지역인 죽산천에 위치한 죽산천 인공습지의 수생태학적 특성을 평가하기 위해 수질에서의 영양염류 처리효율, 수생식물의 무기성분 흡수량 및 퇴적물내 화학적 특성을 평가하였다. 수질에서의 영양염류 처리효율은 COD와 SS를 제외하고 전반적으로 낮았다. 죽산천 인공습지의 주요 우점종의 영양염류 흡수량을 조사한 결과, T-N 및 T-P 흡수량은 8월에 노랑꽃창포 > 수련 > 노랑어리연꽃 순으로 최대흡수량을 나타내었다. 퇴적물내 O.M 함량은 시기별로 큰 차이가 없었고, T-N 및 T-P의 함량은 봄에서 여름으로 시기가 변함에 따라 낮아져서 겨울까지 낮은 함량을 유지하였다. 퇴적물내 microbial biomass C:N:P의 비율은 봄, 여름, 가을 및 겨울이 각각 117~140:1~4:1, 86~126:5~6:1, 68~101:2~6:1 및 47~138:2~4:1로 나타났다. 죽산천 인공습지는 질소와 인의 처리효율이 낮고, 겨울철 수질 정화효율이 낮아 습지의 정화효율 향상을 위한 개선이 필요할 것으로 판단된다.
To evaluate the water quality in Juksancheon constructed wetlands for treating non-point source pollution, the removal rates of nutrients in water and the total amounts of T-N and T-P uptakes by water plants were investigated. Chemical characteristics of T-N and T-P in sediment were investigated. The concentrations of BOD (Biochemical Oxygen Demand), COD (Chemical Oxygen Demand), SS (Suspended Solids), T-N and T-P in inflow were 0.07∼1.47, 0.60∼2.65, 0.50∼4.60, 1.38∼6.26 and 0.08∼0.32 ㎎ L?¹, respectively. The removal rates of BOD, COD, SS, T-N, and T-P were ?¹0, 51, 66, -3 and 5%, respectively. The maximum amount of T-N uptake by water plants in August was 368.7 ㎎ plant?¹ in the 2<SUP>nd</SUP> treatment stage by Nymphoides peltata, 1314.6 ㎎ plant?¹ in the 3<SUP>rd</SUP> treatment stage by Iris pseudacorus, 1160.4 ㎎ plant?¹ in the 4<SUP>th</SUP> treatment stage by Nymphaea tetragona GEORGI, respectively. The maximum amount of T-P uptake by water plants in August was 121.7 ㎎ plant?¹ by Nymphoides peltata in the 2<SUP>nd</SUP> treatment stage, 268.7 ㎎ plant?¹ by Iris pseudacorus in the 3<SUP>rd</SUP> treatment stage and 212.0 ㎎ plant?¹ by Nymphaea tetragona GEORGI in the 4<SUP>th</SUP> treatment stage, respectively. Organic matter contents in sediments were not different. Contents of T-N and T-P in sediments were higher in spring. Microbial biomass C:N:P ratios in sediments in spring, summer, autumn and winter were 117~140:1~4:1, 86~126:5~6:1, 68~101:2~6:1 and 47~138:2~4:1, respectively. We could conclude that Juksancheon constructed wetlands show high removal efficiencies of COD and SS. However, improvements of management in winter season should be considered to improve the removal efficiencies of pollutants.