동복수원지 자생식물이 침수시 수질에 미치는 영향 = Effects of submerged Wild Growing Plants on Water Quality in the Dongbok Reservoir

다국어 초록 (Multilingual Abstract)

When wild growing plants such as Alopecurus aegualu var. amurensis were submerged in water for experiment, the conductivity and color of the water increased to a maximum 67 times that of raw water on the edged of Dongbok reservoir. In case of withered matters of Setaria viridis, the variation of color vas small, but when withered matters of Persicaria lapathafolia - which is used for dye materials - were submerged, the increasing rate of water color was very high. The variation of concentration of phosphorus and nitrogen in growing plants such as A. aegualis var, amurensis was 4∼37times and 2.5∼10times higher than that of withered plants(S. viridis and P. lapathafolia). As for treatment method. when ashes of A. aegualis var. amurensis were submerged in water, the concentration of total nitrogen(TN) and total phosphorus(TP) decreased more than that of non-treated. On the contrary, in case of withered matter of Persicaris lapathafolia, when ashes were submerged in water, the concentration of TN and TP increased more than that of the nontreated. Total nitrogen amount from the total plant biomass in the Dongbok reservoir was 12,821㎏ and total phosphorus amount was 1,141㎏. From among them, the amount of TN and TP in Persicaria lapathafolia was larger than that of any other dominant species.