저수지 주변 식물의 침수시 수질 영향

Abstract

In summer and early autumn, eutrophication occurs occasionally in many reservoirs. Lakeside macrophyte which is one of internal pollutants effects on water quality when it issubmerged during water surface is rising after rainy season. This study include examination ofpollutant load, species of plant, community structure and productivity of macrophyte in unitarea at lakeside. The result of this research will be used as a guideline of water qualitymanagement on reservoir through assessing water quality effect of submerged plant. The arealdistribution, composition of species and submerged area of macrophyte changes according torainfall pattern every year, so it is difficult to calculate nutrient load annually from submergedmacrophyte. In this study, the nutrient load from submerged macrophyte assess fromDaecheong and Juam reservoir in 2001. TN and TP load of submerged macrophyte shows0.043% and 0.069%, respectively, of annual discharge load on Daecheong watershed. At lakeJuam, TN and TP shows 0.64% and 1.28% load, respectively. The reason that nutrient load oflake Juam is greater than that of lake Daecheong is that macrophyte distribution area of lakeJuam is 5 times greater than that of lake Daecheong. Total nutrient load of lake Daecheong is 3times greater than that of lake Juam.